Car Thermostat Stuck Open

Thermostat stuck open. Start your vehicle to let the engine idle.

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In this video i will be teaching you the difference between a car thermostat being stuck open and being stuck closed and if it is dangerous and what are the.

. If it was stuck fully open I wouldnt have temp issues in warm weather while on the highway. If a thermostat is stuck in the closed position it will never allow coolant to circulate fully so no heat for you. How to Tell if Your Cars Thermostat Is Stuck Closed Method 1 Method 1 of 3.

If a thermostat was stuck open the lower radiator hose would start warming up as soon as the engine is started. Method 2 Method 2 of 3. An open thermostat would be the normal position for a warmed-up engine.

The range varies by manufacturer and you would have to look them up for your vehicle. Poor heater operation and excess fuel consumption would be caused by slow warm-up. In cases where the thermostat is stuck open youll notice that the temperature needle moves up much slower than usual and likely stops before it gets to its normal mid-point on the gauge.

The thermostat in this car works properly. Low Engine Temperature. The Check Engine light may come on too.

The heater doesnt provide warm air even after the engine has been running a while though there are other possible causes including a bad heater core. A stuck-open thermostat can also cause lack of heat from the heating system. Observing the Coolant Flow.

Open the hood of your vehicle and. The thermostat should open and close as the engine temp moves up. If it was stuck closed Id be overheating constantly.

If you notice this try cranking up your heater and if it doesnt blow warm air out of the vents youve pretty much confirmed a broken thermostat. A stuck thermostat is only one possible cause of a car overheating but it can be the easiest cause to fix. The engine thermostat speeds engine warm-up by restricting coolant flow until a predetermined temperature is reached.

You see a check engine light. Measuring the Engine and Hose Temperatures. Take the cap off of your radiator.

Your vehicles heater works in conjunction with the engines cooling system. Idle is also a crapshoot ranging from 180 to 210 dependent on ambient temp. So from this I assume that my thermostat has stuck partially open.

If a thermostat was stuck closed there would be no flow even after the engine reached the operating temperature and the lower radiator hose would remain cool. A stuck-open thermostat would not cause overheating. It the heater is cold and takes ages to warm up and is lukewarm then it stuck open.

Yes it can fail to open fully get stuck fully or partially open or stick closed. The temperature gauge stays on cold all the time. When the thermostat is stuck open the engine temperature drops below normal when driving especially on the highway in cold weather.

Good first step in replacing the thermostat and the coolant is good for a few more years and a lot of miles so you can save yourself some there. Similarly you may ask is it OK to drive with a thermostat stuck open. Monday June 04 2012 517 AM permalink stuck open thermostat will result in excessive fuel consumption and fumy exhaust due to the engine management running in open loop from too low temps.

Or all the above. The heater is also an obvious one. Stuck open thermostat symptomsSign of a stuck open thermostatCar thermostat not workingCar thermostat how it worksTroubleshooting thermostatCar thermost.

In most car models it does also says coolant in text on the cap of it. If your car is running unusually cool and not building up any heat in the engine its likely that your thermostat is stuck open and is letting too much coolant through.

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