Updated at: 24-04-2022 - By: micdot

right If your thermostat is stuck closed, this article will help you figure out what to do about it. closed The thermostat in your car is the same as the thermostat in your home. It makes sure that your engine stays at the right temperature. This is done by controlling the flow of coolant through your engine and then back through the radiator so that it doesn’t get too hot. Is there anything that can happen if a thermostat stays closed and open?

When your thermostat is working properly, it opens and closes as needed to let or stop coolant flow, depending on how hot your engine is.

Your thermostat can get stuck in either the open or closed position at any time, which isn’t very good news. People have a lot of trouble if their cars thermostats stay open while they’re on the road.

When your thermostat doesn’t shut off when it should, coolant flows freely through your engine. In the beginning, it may not seem like this is a big deal. (What are the signs of a bad thermostat in a car?)

Symptoms of a bad Thermostat Stuck (Open/Closed)

It’s possible for a thermostat to be broken in two ways.

The thermostat is stuck in the open position:

Temperatures in the engine drop when the thermostat isn’t closed. This happens most often when the car is on a highway in cold weather. A thermostat that is stuck open can also make the heating system not work as well as it used to. The Check Engine light could also come on.

Thermostat stuck closed:

This could cause the engine to overheat. This isn’t the only thing that could happen. If the thermostat case is leaking coolant, the thermostat may need to be replaced.

If you think your thermostat isn’t working right, do a few tests. Remove the radiator cap first, then start the engine when the engine is cold to get it going. There’s a good chance that the thermostat is stuck open if the coolant starts swirling and moving right away.

In this case, the thermostat is most likely stuck closed. After 10 minutes, the coolant doesn’t flow and the temperature sensor doesn’t change. Replace the radiator cap after the engine has been turned off. Find out if the temperature differences in the radiator hoses are too high or too low

If one side of the house is colder than the other, but the other side is hot, the thermostat is probably stuck closed, and it’s not going to open. Always keep your hands away from the front of the engine when the fan and belt are moving.


The last step is to remove the thermostat and check the temperature. Make sure the water is at the temperature set by the thermostat. Then, put a pair of pliers in the water to help you submerge it. Otherwise, you’ll know it’s bad if it doesn’t open when it should.

Contaminated fluid or an old thermostat with weak springs could cause the thermostat to break down. Coolant mix-ups, not replacing the old one, or gaskets or other parts breaking off can also cause contamination of the coolant. When You Find a Bad Thermostat.

In general, taking care of your home will keep you from getting sick, but thermostats can also break down over time.

Is driving with a thermostat Stuck Closed or Open Okay?

Most auto mechanics will tell you that not having a thermostat in your car isn’t a good idea because it can get very hot. You can’t drive a car if your thermostat is stuck in the “closed” position, so your engine will overheat and you won’t be able to drive.

As a result, is it possible to drive with a stuck open thermostat?

Even if the thermostat isn’t open, a car can still run well even if it isn’t. It will run on the warm side, but not all the way through, and it will be enough to keep the inside warm. It will, however, stop the reservoir water from flowing as the outside temperature rises, causing the car to get too hot.

Besides that, how do you fix a thermostat that won’t shut off? The thermostat doesn’t work. What should you do when it doesn’t work?

Make sure your car is parked on a level surface and that the emergency brake is on.

You should wait to go on your trip until the morning or a few hours after you finish your task.

When your car has cooled down, open the hood.

The thermostat should be on the wall, so look for it.

It’s time to remove the radiator cap from the radiator.

Do not start the car yourself. Let someone else do it.

While driving in cold weather, when the thermostat isn’t closed, the temperature of the engine drops below what it should be. A thermostat that is stuck open can also make the heating system not work as well as it used to.


When your engine is always cold, it can hurt your business. You’ll spend a lot of money on gas, and your car’s performance will go down because of it. Also, if you’re traveling on a very cold day, you won’t be getting much heat, which will be both bothersome and uncomfortable for you, so you should think about that.

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This is a simple thing to figure out and fix, whether you take your car to a mechanic or do it yourself.

To avoid paying more for gas and having a car that doesn’t run well until this is fixed, there’s no point in putting it off. As soon as possible, get it fixed.