Thermostat sticking intermittently

Next I would look at the thermostat but, since increased rpms seems to "cool it down" and, a stuck thermostat won't allow coolant to flow past it so, guessing that isn't it ... unless it's sticking intermittently but, that usually isn't dependent on coolant flow. Then I would look at the coolant temp sensor and the water pump.The first thing to do to solve the Honeywell thermostat troubleshooting is by testing the heat. You need to turn on the thermostat to the heat position. Don’t forget to set the temperature. Because you want to test the heat, it is better to set the temperature as higher. For example, you can set the heat position to 80 degrees Fahrenheit. Jun 04, 2020 · If your thermostat sticks open, you are likely to notice that your engine takes longer to warm up or doesn’t warm up at all. Your heater may also blow cooler air than usual. If your car is equipped with a temperature gauge, you might notice the needle stays lower than the normal range. One sign that you might have a stuck-closed thermostat is rapid temperature increase during normal operation. If overheating is indicated on your dash, do not delay in getting it checked out and repaired. Another symptom may be leaks near the thermostat housing. When blocked, the pressure can rupture gaskets and compromise ....Aug 26, 2021 · The engine management light didn’t appear with the garage until a few days of them road testing, they’ve come back to me telling me “We have carried out further tests and we believe the issue is being caused by an intermittent sticking thermostat. Which would be the reason why it took awhile for the fault to reappear” Jun 04, 2020 · If your thermostat sticks open, you are likely to notice that your engine takes longer to warm up or doesn’t warm up at all. Your heater may also blow cooler air than usual. If your car is equipped with a temperature gauge, you might notice the needle stays lower than the normal range. Jul 20, 2015 · A stuck heat anticipator is another possible culprit if the thermostat is a mechanical model. With the cover off, locate the anticipator by looking for a little metal arm sitting on a circular dial. Push the arm gently in either direction and it should become free. Jul 20, 2015 · Minor thermostat problems can mimic more serious issues with the HVAC system and directly impact cooling system performance and comfort. When thermostat problems develop, they are rarely dramatic events with sparks flying, or where smoke alarms sound. Most thermostat malfunctions cause subtle or sudden changes in the performance of your cooling ... One sign that you might have a stuck-closed thermostat is rapid temperature increase during normal operation. If overheating is indicated on your dash, do not delay in getting it checked out and repaired. Another symptom may be leaks near the thermostat housing. When blocked, the pressure can rupture gaskets and compromise ....the thermostat/radiator light comes on intermittently and sometimes stays on for a minute or two..most times it goesout very quickly(less than 30 seconds). i think i will replace the thermostat and see if that fixes the problem..then the sensor if that does not do the trick..i figure the t-stat is closing temporarily and then opens again or …The most common causes of boost pressure problems are a faulty turbocharger, wastegate, boost pressure sensor, boost control valve or a boost pipe leak. RELATED: 6 Symptoms of a Boost Leak (& How to Find it Easy) 2. Faulty engine sensors. Faulty engine sensors can also cause limp mode.Wait for at least 15 minutes to ensure that temperature is stabilized and giving a correct reading, then compare it to the reading on your thermostat. If the numbers are more than a degree apart, the thermostat is likely not giving an accurate reading. This is a very important factor to know when you speak with the repairman about the problem.The thermostat could be sticking but that is rare that it does it intermittently. I would suspect cooling fans not operating properly. If it is a water pump problem then usually the temperature ...car thermostat last thermostat last cars View All » Question about 2008 Chevrolet Impala. 2 Answers . What would cause the engine to intermittently overheat? Posted ... What would cause the engine to intermittently overheat? Posted by Robert Bedford on Sep 17, 2015. Want Answer 1 ...Aug 26, 2021 · The engine management light didn’t appear with the garage until a few days of them road testing, they’ve come back to me telling me “We have carried out further tests and we believe the issue is being caused by an intermittent sticking thermostat. Which would be the reason why it took awhile for the fault to reappear” If your thermostat is stuck closed (or close to closed) the temperature will climb above 200, particularly at lower speeds like when you are stuck in traffic. If it is stuck open, temperature will drop below 200 at higher speeds (highway driving). If the 'stat is sticking intermittently, the temp will bounce around occasionally.Details for Carrier Thermostat Troubleshooting. Check the Wiring. 1 Check the wiring. A careful, methodical inspection of the wiring and connections. Something could have pinched the wire bundle or fell on it from inside the wall and damaged it. The thermostat wire is not protected inside the wall (not ran in conduit).Make sure the System switch is set to the Heat mode and raise the thermostat setting so that it is greater than the room temperature. Most thermostats, both mechanical and electronic, will click within a few seconds. Some heat pumps have a five-minute time delay built in as a safety feature.[2] Thanks to reader S.R. for discussing loss of heat due to a thermostat wiring mistake, October 2010 [3] Thank to Mr. Scott Meenen , G&S Mechanical Services , for providing some common thermostat wiring codes also found at Mr. Meenen's web page Malware Deleted 12/9/2014 . Thermostats fail because they become weak, stuck open or stuck closed. When a thermostat is stuck open, coolant constantly circulates and the engine takes longer to reach operating temperature. This affects everything from performance to mileage to emissions and will ultimately take years off the engine’s life. New thermostats for most trucks are relatively inexpensive and are best installed by a certified and qualified mechanic. The cost for parts in this type of repair are normally under $35.00. The labor takes normally about two hours, so depending on the current cost per hour for labor, this repair will normally be under $250.00. One way to tell if the thermostat is stuck open is to check the outlet radiator hose. The hose should not have any coolant circulation while the engine is warming up and therefore should remain cold until the engine reaches operating temperature. If it is the same temperature as the inlet hose during the heating process, it is probably stuck open.Jan 12, 2008 · Intermittent overheating. Thermostat keeps sticking. On fifth new thermostat now. When hot, sending unit to gauge reads 22 ohms. Temp gun reads at 130 degrees on hose side & 230 degrees on engine side of thermostat. Fan cycles normally (we think). All new hoses, water pump, timing belt, radiator, etc. Pressure test shows no leaks in cooling system. libra horoscope september 2022 career lambs bread meaning; bitdefender removal tool without password 4. Accelerator Pedal Position Sensor (APPS) Failure - Cummins 5.9L. The accelerator pedal position, referred to as APPS, is responsible for telling the ECM how depressed the pedal is. This controls throttle and tells the ECM to open or close the throttle body, affecting engine RPM's.New thermostats for most trucks are relatively inexpensive and are best installed by a certified and qualified mechanic. The cost for parts in this type of repair are normally under $35.00. The labor takes normally about two hours, so depending on the current cost per hour for labor, this repair will normally be under $250.00. Pull the thermostat display straight off the base. Make sure that there aren’t any cables sticking out from the wall that might prevent the display from being fully seated. If there are, press them back into the wall. Line up the display and base connectors and press the display straight onto the base until you hear it click into place. Sep 11, 2020 · Bad Thermostat Symptoms. #1 – Temperature Gauge Reading Higher (or Lower) Than Normal. #2 – Sudden Air Temperature Changes Inside Vehicle. #3 – Coolant Leaking. #4 – Rumbling Noises. #5 – Heater Malfunction. Car Thermostat Replacement Cost. Jun 04, 2020 · If your thermostat sticks open, you are likely to notice that your engine takes longer to warm up or doesn’t warm up at all. Your heater may also blow cooler air than usual. If your car is equipped with a temperature gauge, you might notice the needle stays lower than the normal range. anita knutson brother Jul 01, 2018 · Fortunately, a thermostat failure is one of the many car problems your can diagnose and fix yourself. Here are the signs your car thermostat is failing: The temperature gauge reads high and the engine overheats. The temperature changes erratically. The vehicle’s coolant leaks around the thermostat or under the vehicle. Thermostat sticking intermittently. Minor thermostat problems can mimic more serious issues with the HVAC system and directly impact cooling system performance and comfort. ... Thermostat intermittently looses power. 3 ton carrier split system that has randomly and intermittently stopped cooling 3 times this weekend. System was down for about 8 ...If the problem persists, you may need to replace your thermostat. Step 2 Check level Use a bubble level to check whether the subbase is mounted evenly on the wall. Tighten the mounting screws when it's level. Step 3 Move the anticipator. setsendconnectorBut we suspect that a more common cause of TEV valve sticking is the freezing of a droplet of water at the needle valve, holding it stuck. The valve stops working properly. But as we learned from Ontario reader E.T. and her HVACR installation and service company, TEVs may be "sticky" right out of the box from the manufacturer.To troubleshoot this A/C thermostat problem, just go in order. First, check the power button. If that doesn't work, try replacing the batteries. Lastly, go to the breaker box and see if there's a tripped breaker. Any of these things can restore power and get the thermostat working again. 2. Engine overheating.Mar 14, 2018 · Look to see if the coolant is swirling/flowing immediately — that means the thermostat’s stuck open. If the coolant doesn’t flow after 10 minutes or so and continues to be stagnant after the temperature gauge indicates it’s hot, the thermostat’s likely stuck closed. Replace the radiator cap and turn off the engine. Stick with the workout routine below and enjoy the benefits of having bigger, stronger, and more muscular legs in less than 10 minutes daily. 23 BEST EXERCISES ON HOW TO GET BIGGER LEGS AT HOME. 1- Lunges. 2- LEG EXTENSIONS. 3- BARBELL SQUATS. 4- STIFF- LEGGED DEADLIFTS. 5- SQUAT JUMPS. 6- SPRINTS/FAST RUNNING.The RZR series price range is $10,299-$27,499. Polaris Ace series: Polaris Ace is a line of off-road ATVs with a single, centered seat like a cockpit. It is meant to have the comfort of a side-by.When its acting up the top radiator hose is hot and the bottom one cold (or much cooler), and the radiator fans aren't running - Im pretty sure because there is no coolant circulating due to the thermostat being stuck closed.Next I would look at the thermostat but, since increased rpms seems to "cool it down" and, a stuck thermostat won't allow coolant to flow past it so, guessing that isn't it ... unless it's sticking intermittently but, that usually isn't dependent on coolant flow. Then I would look at the coolant temp sensor and the water pump.3. Maytag Dryer Knob Is Stuck Causes. When the knob on your Maytag dryer timer is stuck, it might be due to wear and tear over time. If this is the case, the only option is to remove the knob and replace it with a new one. On the timer shaft, the knob is located inside the knob assembly. You'll find the timer shaft on the control console ...Likewise, if the thermostat is "stuck" open, the flow of coolant is constant, it results in the vehicle's engine temperature never reaching an optimum level of heat, creating performance problems and accelerating the wear-down of parts. There are 4 common symptoms associated with a bad or failing thermostat. 1. High-Temperature Reading ...- 43k miles, carfax indicates that the termostat and water pump was replaced again as well as the thermostat housing and coolant temperature sensor. - 80k miles I replaced thermostat and drained coolant, replaced with G13 coolant Possible issues: - Thermostat: Symptoms still sound like a sticking thermostat. Could have gotten a bad thermostat.car thermostat last thermostat last cars View All » Question about 2008 Chevrolet Impala. 2 Answers . What would cause the engine to intermittently overheat? Posted ... What would cause the engine to intermittently overheat? Posted by Robert Bedford on Sep 17, 2015. Want Answer 1 ... 130gr barnes ttsx Aug 26, 2021 · Is there such a thing as an intermittent sticking thermostat? I brought a 2013 A Class from an approved dealership two weeks ago. The next day the engine management light appeared. Sent car back to dealership to be looked at. The engine management light didn’t appear with the garage until a few... Test it: pull the thermostat out, and carefully slip a thin piece of metal in between the poppet and the body. With the thermostat closed - it's natural state - it will grip the piece of metal tight. Then hang the thermostat from that piece of metal, and suspend it in a pot of water on your kitchen stove.pull the thermostat and hang it in a pot of water put the heat on. the thermostat will have a number on it in the water put a kitchen thermometer in the water when it reached thermostat temperature see if it is open or at least partially open. at 210 boiling point it should be fully open. this test will only cost you a tube of silicone and a ...Answer (1 of 6): Q: Can a car thermostat fail intermittently and work on and off? A: Yes, that is possible * That is why we used to change thermostats regularly * Modern thermostats are extremely reliable so we try to check other things first * Make sure that there is the proper level of coo... Mar 14, 2018 · Look to see if the coolant is swirling/flowing immediately — that means the thermostat’s stuck open. If the coolant doesn’t flow after 10 minutes or so and continues to be stagnant after the temperature gauge indicates it’s hot, the thermostat’s likely stuck closed. Replace the radiator cap and turn off the engine. Jul 20, 2015 · Minor thermostat problems can mimic more serious issues with the HVAC system and directly impact cooling system performance and comfort. When thermostat problems develop, they are rarely dramatic events with sparks flying, or where smoke alarms sound. Most thermostat malfunctions cause subtle or sudden changes in the performance of your cooling ... A sticking thermostat, intermittent cooling fan, or plugged radiator will not cause the coolant to go low after you fill it up. A leaking head gasket will cause the coolant to leak into the combustion chambers and be shot out the exhaust pipe with the exhaust gases. You won't see any coolant leaks, but your coolant slowly goes down over time.Intermittent overheating. Thermostat keeps sticking. On fifth new thermostat now. When hot, sending unit to gauge reads 22 ohms. Temp gun reads at 130 degrees on hose side & 230 degrees on engine side of thermostat. Fan cycles normally (we think). All new hoses, water pump, timing belt, radiator, etc. Pressure test shows no leaks in cooling system.Jan 12, 2016 · The thermostat itself isn’t stuck in any one position, but it will still produce false readings and cause issues with coolant regulation. 4. Coolant Leaks Around Thermostat Housing or Under Vehicle. Another indication may be leaking coolant, which can occur when the thermostat does not allow coolant to flow when stuck in the closed position ... Jul 20, 2015 · A stuck heat anticipator is another possible culprit if the thermostat is a mechanical model. With the cover off, locate the anticipator by looking for a little metal arm sitting on a circular dial. Push the arm gently in either direction and it should become free. gy6 139qmb valve adjustmentNew thermostats for most trucks are relatively inexpensive and are best installed by a certified and qualified mechanic. The cost for parts in this type of repair are normally under $35.00. The labor takes normally about two hours, so depending on the current cost per hour for labor, this repair will normally be under $250.00. That relay powers the fan. Yes relays can fail intermittently but your issue is the sensor suddenly going to -128. That has nothing to do with the relay. I think when that happens the DME is seeing that low number and and kicking on the fan by default to protect the engine. You get the thermostat stuck open code because the temp is too low.Sep 11, 2020 · Bad Thermostat Symptoms. #1 – Temperature Gauge Reading Higher (or Lower) Than Normal. #2 – Sudden Air Temperature Changes Inside Vehicle. #3 – Coolant Leaking. #4 – Rumbling Noises. #5 – Heater Malfunction. Car Thermostat Replacement Cost. Sticky thermostat would be the first thing to consider. Cheap enough to just replace unconditionally. Also if the radiator fan is electric, it may not always be starting when it needs to. This could cause overheating when sitting still or in slow traffic, but not at speed. E exranger06 Thread starter Joined Jan 25, 2008 Messages 4,463 LocationJun 19, 2022 · In case the thermostat becomes stuck open, there will be a steady flow of coolant to the engine which will not allow the engine to reach a certain level of heat resulting in performance issues. If the reverse is the case, there will be no coolant passage to the radiator for cooling purposes, resulting in engine Overheating. Troubleshooting Broken Thermostats - The main connection between the air conditioning and heating system and the end-user is the thermostat. Beyond the air conditioning and heating thermostat, many people know nothing about the HVAC systems that keep them comfortable year-round. While the thermostat may be the problem, make sure you eliminate other possible heating and cooling problems.Oct 22, 2021 · Most Engine Thermostat Problems Happen, In One Of Two Ways: 1-Stuck Open Thermostat There is continuous flow of coolant into the radiator; causing the engine to run cold. Also, overcooled engines, run inefficiently. Which leads to, increased fuel consumption and higher emission levels. As a result, engine parts enduring more wear. 3. Loose connection to thermostat or system. 4. Furnace Lock-Out Condition. Heat may also be intermittent. 5. Heating system requires service or thermostat requires replacement. 1. Re-light pilot. 2. Set System Switch to HEAT and raise setpoint above room temperature. 3. Verify thermostat and system wires are securely attached. 4.Jun 19, 2022 · In case the thermostat becomes stuck open, there will be a steady flow of coolant to the engine which will not allow the engine to reach a certain level of heat resulting in performance issues. If the reverse is the case, there will be no coolant passage to the radiator for cooling purposes, resulting in engine Overheating. Become a Patron: https://www.patreon.com/myrvworksParts and Tools Links: https://myrvworks.com/resources/darrens-tool-list/Service Manuals: https://myrvwo... Checking For the Signs of a Bad Thermostat. If you suspect a faulty thermostat, run a few checks. With the engine cold, remove the radiator cap and start the engine. Look to see if the coolant is swirling/flowing immediately — that means the thermostat's stuck open. If the coolant doesn't flow after 10 minutes or so and continues to be ...Intermittently the temperature sensor will read "---" instead of a legitimate temperature. This will last for 5-15 miles, then it comes back on for an unknown amount of time (5-100 miles) and repeat. ... thermostat keeps the "---°F" away I will give it a week or two and see if the code clears itself / was related to the stuck thermostat. EDIT ...I replaced the thermostat yesterday after the temp guage on the dashboard was at about 30%, running cold, Suggesting the thermo was stuck open, Also the heating inside the car wasnt great, further suggesting the same problem. The temp guage went back to 50%, (12 o clock) which is normal and the heating returned to normal. Quite hot.If your temp gauge is showing in the blue range when you drive, you need to replace the thermostat, yours is stuck open. Use the cluster test as Doug suggested to see what your temp is while driving. It should be around 95C +- after a 20 minute drive on the highway at a constant speed.The cost for parts in this type of repair are normally under $35.00. The labor takes normally about two hours, so depending on the current cost per hour for labor, this repair will normally be under $250.00. It should be noted that the cost of coolant may be added to the total cost. Thermostats can be relatively easy to replace if the housing ... who owns medely The cost for parts in this type of repair are normally under $35.00. The labor takes normally about two hours, so depending on the current cost per hour for labor, this repair will normally be under $250.00. It should be noted that the cost of coolant may be added to the total cost. Thermostats can be relatively easy to replace if the housing ...Jul 20, 2015 · Minor thermostat problems can mimic more serious issues with the HVAC system and directly impact cooling system performance and comfort. When thermostat problems develop, they are rarely dramatic events with sparks flying, or where smoke alarms sound. Most thermostat malfunctions cause subtle or sudden changes in the performance of your cooling ... Answer (1 of 6): Q: Can a car thermostat fail intermittently and work on and off? A: Yes, that is possible * That is why we used to change thermostats regularly * Modern thermostats are extremely reliable so we try to check other things first * Make sure that there is the proper level of coo... Disconnect the pipe at the pump inlet. The fourth and less likely possibility is a failure of the pressure pump that pushes water through all the machine's pipes. In this case, you will have to disassemble the coffee machine further to get to the pump and replace it. Check here a complete article about this issue.The most common causes of boost pressure problems are a faulty turbocharger, wastegate, boost pressure sensor, boost control valve or a boost pipe leak. RELATED: 6 Symptoms of a Boost Leak (& How to Find it Easy) 2. Faulty engine sensors. Faulty engine sensors can also cause limp mode.Experienced intermittent temp increases. Ran Vag-Com, no codes...guessed at thermostat. Yup. Haven't heard of any thermostat issues with 4.2 V8. Thank goodness for extended warrantee. Had dealer do early timing belt, water pump, tensioner, rollers, etc. while in there. Now it's time...[2] Thanks to reader S.R. for discussing loss of heat due to a thermostat wiring mistake, October 2010 [3] Thank to Mr. Scott Meenen , G&S Mechanical Services , for providing some common thermostat wiring codes also found at Mr. Meenen's web page Malware Deleted 12/9/2014 . Question - I HAVE A HONEYWELL HOME THERMOSTAT WHICH IS INTERMITTENTLY - N3. Find the answer to this and other HVAC questions on JustAnswer. We use cookies to improve your experience. By continuing to use this site you consent to the use of cookies as described in our cookie policy, unless you have disabled them.To fix a vibrating inducer fan, follow these steps: Power down your furnace. Turn off the power disconnect to your furnace so it won't turn on while you're taking it apart. Remove the access panels to your furnace. Specifically, you need to remove the panel that gains you access to the inducer fan assembly.Chevy Silverado 1500 Overheating Issue. shadetree63 Member Posts: 1. June 2014 edited June 2014. I have a 2006 Pickup, 5.3L with an overheating issue. Initially, the overheating was intermittent, so i figured it was a thermostat (sticking at times). I replaced the thermostat and the problem still persisted, and actually the engine seemed to be ...Aug 26, 2021 · Is there such a thing as an intermittent sticking thermostat? I brought a 2013 A Class from an approved dealership two weeks ago. The next day the engine management light appeared. Sent car back to dealership to be looked at. The engine management light didn’t appear with the garage until a few... My guess would be that the thermostat (Item 13 in Section 3) is sticking open. Could be a loose connection but I would vote for the thermostat. Jiggling the timer would also jiggle the thermostat. Instead of jiggling just turn the temperature knob back and forth a few times if it fires up then replace the thermostat.Chevy Silverado 1500 Overheating Issue. shadetree63 Member Posts: 1. June 2014 edited June 2014. I have a 2006 Pickup, 5.3L with an overheating issue. Initially, the overheating was intermittent, so i figured it was a thermostat (sticking at times). I replaced the thermostat and the problem still persisted, and actually the engine seemed to be ...It turns the a/c off in case the outside temp is below freezing to protect the compressor from damage. It also turns on both cooling fans in case the engine is overheating. This is why the fan turns on and may run after the car is turned off. With the temp sender being the possible cause I decided to replace it.A slow or sticking thermostat will cause these problems. When the block begins to overheat, the pressure builds as well and can exceed the cap pressure rating of 16 psi. This causes pressure and coolant to be released through the cap. A flush-n-fill would also be advisable if it hasn't been done in the last couple of years.Become a Patron: https://www.patreon.com/myrvworksParts and Tools Links: https://myrvworks.com/resources/darrens-tool-list/Service Manuals: https://myrvwo... Jul 20, 2015 · A stuck heat anticipator is another possible culprit if the thermostat is a mechanical model. With the cover off, locate the anticipator by looking for a little metal arm sitting on a circular dial. Push the arm gently in either direction and it should become free. The cold control thermostat senses freezer temperature and turns on the compressor to keep the freezer compartment cold. If the cold control sensor fails or the internal contact inside the cold control isn't sending current to run the compressor, the freezer won't cool. If the compressor runs but doesn't stay on long enough to keep the freezer ...If the problem persists, you may need to replace your thermostat. Step 2 Check level Use a bubble level to check whether the subbase is mounted evenly on the wall. Tighten the mounting screws when it's level. Step 3 Move the anticipator. setsendconnector3. Check Your Thermostat. Reason number three is a bad thermostat or a thermostat working incorrectly. Now I say working incorrectly because perhaps it could just be dead or weak batteries. When batteries are weak your display will still be on but the batteries don't have enough power to close the switch to make a call for cooling. sussex police numberman united flag gif Jul 20, 2015 · Minor thermostat problems can mimic more serious issues with the HVAC system and directly impact cooling system performance and comfort. When thermostat problems develop, they are rarely dramatic events with sparks flying, or where smoke alarms sound. Most thermostat malfunctions cause subtle or sudden changes in the performance of your cooling ... Answer (1 of 6): Q: Can a car thermostat fail intermittently and work on and off? A: Yes, that is possible * That is why we used to change thermostats regularly * Modern thermostats are extremely reliable so we try to check other things first * Make sure that there is the proper level of coo... When its acting up the top radiator hose is hot and the bottom one cold (or much cooler), and the radiator fans aren't running - Im pretty sure because there is no coolant circulating due to the thermostat being stuck closed.Got home as soon as I stopped, needle spiked to red. I popped hood and cap had steam coming out. Also there is coolant coming out a small pipe sticking out of firewall below heater core.There is burnt coolant coming out of vents in cab like steam. Overflow bottle is at full line. Prior to this the heat would work intermittently. Blow hot then cold.It's time to troubleshoot an air conditioner for a faulty or broken condensing unit when you notice issues like: No cooling or inadequate cooling. System turning on and off rapidly (short cycling) System running continuously or for unusually long periods of time. Frost or ice on the coil or copper refrigerant tubing.My guess would be that the thermostat (Item 13 in Section 3) is sticking open. Could be a loose connection but I would vote for the thermostat. Jiggling the timer would also jiggle the thermostat. Instead of jiggling just turn the temperature knob back and forth a few times if it fires up then replace the thermostat.Messages. 7. Apr 20, 2017. #1. I just bought a 1998 Sea Ray 230 BR with the 5.7 L EFI, Bravo 3. I noticed that it intermittently will idle at 1200 RPMs. This occurs AFTER I have started and driven the boat. The only way to "fix" the high idle is to turn off the motor and restart it. Then it idles at 600 RPMs.Aug 26, 2021 · The engine management light didn’t appear with the garage until a few days of them road testing, they’ve come back to me telling me “We have carried out further tests and we believe the issue is being caused by an intermittent sticking thermostat. Which would be the reason why it took awhile for the fault to reappear” May 07, 2021 · Your vehicle needs a functional thermostat to regulate coolant temperature and keep the engine performing at its best. Overheating Engine. You may be dealing with a faulty thermostat if your vehicle’s temperature gauge reading is high into the red mark. This could mean that the thermostat is stuck closed, causing the engine to overheat. The fix was pulling the sensor plug off and cleaning the contacts and plugging back in. Problem solved. The sensor is on the back of the engine block on the passenger side behind the exhaust manifold. I think it is vulnerable to heat there and makes an intermittent connection. 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