The engine is not overheating and everything else is working fine. However, the engine fan comes on as soon as I switch the car on.
Will this cause problems as the winter sets in? The engine usually reaches operating temperature in about 15 to 20 minutes. That's when the cooling fans kick in. I have a Chevy Express I changed the coolant sensor and the thermostat but my temperature gauge is still on cold. What can be the problem at this point? Check the wiring and connection between the gauge and the sender or switch.
You may need the wiring diagram for your model and a test light or digital multimeter. You can find in your vehicle repair manual. If you don't have the manual, stop by your local auto parts store. This other post may help:. Internal leak: A leaking head or intake gasket could be the problem. Other possibilities include a cracked head or block. External leak: On some Ford Explorer models the cowl can actually leak rainwater into one or more plugs.
Water seeps through the well and can cause a misfire. But check the boot and well for signs. Yes, you can replace the thermostat housing. Go to your local auto parts store or order online. I have Honda Civic.
How to Troubleshoot a Faulty Car Thermostat | YourMechanic Advice
Temperature gauge shows normal reading when fan off, but when I turn the heat on, the temperature gauge drops to minimum. AC works fine. What could be the reason? I have a PT Cruiser. I checked the radiator cap on it.
It was bad so I replaced it. I thought that was the problem.
How to replace a car thermostat
My temperature started to rise, so I cut the car off, let it cool for a while, then put water back in the radiator. Then I noticed coolant was leaking from the top of the radiator but the radiator seems fine.
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Could a faulty thermostat cause it to do that? I have a BMW E46 and every 2 months the expansion tank cracks. Do I have to replace the thermostat? I have a Toyota Yaris model and started overheating after one hour drive on speed. What could be the problem? There could be several reasons for an engine to overheat. A faulty thermostat is only one of them. This other post can help you diagnose and, possibly, fix the problem. I have "Top-up Coolant" warning light coming on an off sporadically in my car.
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The garage has charged me for a turbo valve but the problem is persistent. I am convinced it is a thermostat issue but no one will believe me as my vehicle is not showing any other faults in a diagnostic test. Can you please help? Check the coolant level sensor.
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There could be something wrong in the circuit or the sensor itself. You probably can do it if you have the repair manual for your model. I have a Toyota 80 series Cruiser. I hooked my float up to go to an event. Drove 30kms and it overheated. I drove home unhooked and drove kms to the event with no float no problems. What could the issue be? Check the fan hub, probably the oil is leaking or there's something wrong with the assembly. This is usually the problem.
Without a thermostat, the engine will never reach the correct operating temperature. Besides an engine running below efficiency, engine components wear will accelerate. So, it's not a good idea to run an engine without a thermostat. Sign in or sign up and post using a HubPages Network account. Comments are not for promoting your articles or other sites. Your theremostat is probably working fine. The problem could be in the radiator cap, or some other component in the system. You need to track down the source.
A clogging radiator, worn coolant, bad airflow, faulty cooling fan Hi there I have changed my thermostat twice in my 99 polo and rad and rad temp switch and temp sensor and warwe pump and still my car overheats but when I take out the thermostat it runs OK what would make this happen? Coz I'm out of ideas unless maybe the housing on the car????
If the thermostat has been in service for a few years, it's better to replace it, since it'll fail sooner or later. Most likely the overheating is because of the leak. Remove all traces of the old gasket under the thermostat housing, install a new gasket and install the new thermostat. This other post can help you here:. The engine needs a thermostat. After replacing it, make sure to bleed the cooling system, otherwise, there's a change air pockets will create hot spots that will lead to overheating.
This post will give you an idea about bleeding the system:. Hai Dan, good day to u. Every time temperature is abit cold the engine will just die. My Dodge Ram Magnum v6 is overheating. Already changed the waterpump and than the thermostat but now its leaking antifreeze from the 2 bolts that are on the thermostat. I also flushed out the heater core. But, if you feel too much heat coming through the vents though, a heating valve must be leaking. Have the AC system checked.
Could tjis be my thermostat going or gone bad? Most car shops wood suggest replacing the thermostat as good measure when replacing the upper radiator hose specially or doing some work on the cooling system, even though there's no service interval for the thermostat. It's just preventive maintenance. Mechanic recommending new radiator hoses and if doing so, should replace thermostat. Is the thermostat replacement necessary? It seems the computer is acting on faulty information from a sensor, possibly the coolant sensor.
Water Pump Problems
Have you checked that yet? What about DTCs trouble codes. Even if you don't see the CEL come on, scan for codes. You need to make sure you don't have a blown head gasket. Do a compression test, even a vacuum test can give you valuable information. Hope this helps. Wondering if you could help me out? I have a Ford fiesta ghia , about , km on the clock. A few months back I noticed my cars radiator fan would keep running once I reached my destination after a long drive it never really did this before. After a couple of weeks of this my radiator burst after about 5 minutes driving.
The temperature warning light came off and I was able to turn the car off straight away, we let it cool and the mechanic took it away and replaced the radiator. About a month after that we had a hose burst towards the back of the motor not sure where exactly. This time the temperature warning light came on and then turned off, so I kept driving not knowing the pipe burst. I drove about 4km before the light came on solidly, then I stopped and there was still quite a bit of coolant coming out on to the ground. Once again, we let it cool and the mechanic took it away and replaced the pipe.
For a while the car was difficult to turn on, but once it was on I could drive it long distances with no loss in power and nothing weird on the temperature gauge.