Relays are used to control almost everything in your car, including the cooling fan. When you turn on your engine, the relay is triggered by an electrical current flowing into it through the ignition system. The relay then turns on the cooling fan to help keep your engine cool. When you turn off your engine, it turns off as well.
This system works great until something goes wrong with one of its parts. If there’s no power getting into the relay or if its wiring has been damaged somehow, then it won’t be able to turn on anymore and neither will anything else controlled by that relay.
What is the problem with my car fan?
Check the temperature gauge in your car. If it’s at or near the red zone, turn on the AC for a few minutes to see if it triggers the fan to turn off. If not, try turning off all other electrical devices in your vehicle and see if that helps kickstart the fan.
How to fix a car fan that won’t turn off?
Make sure the fan selector is set to off. If it’s not, then the fan won’t turn off. Check under the hood for any loose wires or belts, which could be keeping the fan running. Check for any debris that may be covering up your car’s fuses and preventing them from working properly.
Check the electrical connections to make sure they’re tight. If your car has a fuse box, try resetting the fuse to ensure it’s not blown. If your fan still won’t turn off, you may need to replace the relay.
The relay is responsible for turning your fan on and off at certain temperatures. It may be stuck in either position or broken altogether, which can cause the problem you’re experiencing.
Why do car fans tend to run longer than they should?
The reason a car fan tends to run longer than it should is that the engine hasn’t fully cooled down. You may have noticed that when you turn off your car, the fan keeps running for a few minutes after. This is because it’s still trying to cool down the engine and its components.
Cars are designed to be able to handle this extended cooling period, but they don’t do so well with an extended period of cooling off as well which is why letting your car sit idling while you’re waiting in line at the bank or grocery store can cause damage.
To avoid this damage and make sure that everything cools down properly, try turning off your car when you park it and only restarting it when you’re ready to go again.
The fuse or relay is faulty
Fuses are little pieces of wire that get hot when electricity flows through them, and they can’t handle too much current without blowing. They’re usually pretty easy to find in your car just look under the dashboard for a box with a bunch of wires coming out of it. If you see a fuse that looks like this one.
Then you’ve probably got a blown fuse. You can replace it with a new one that looks just like the old one but make sure not to touch any metal parts while you’re working under the hood. To install your new fuse, just unplug the old one and plug in the new one in its place.
The engine is overheating
If your car’s engine is overheating, then it’s probably because your fan isn’t turning off. This can happen for a few reasons, but the most common is that you’ve got a clog somewhere in the system.
The reason fans turn on when your engine gets hot is to help keep it cool. If you have an older car, it might be that there’s some dust or dirt built up in the fan itself you should check this first. If it looks okay, then try cleaning out any clogs in the system with a wire brush or other tool of your choice.
The car fan won’t turn off because it’s a safety feature, and it’s meant to keep the car cool when you’re not using it. If your car is parked outside and it gets too hot in there, then the fan will turn on automatically at a certain temperature and stay on until it cools down again.
This is so that your car doesn’t get too hot inside, which can damage the interior or even cause a fire. If you don’t want your car to ever turn on its fan, then you can adjust the settings so that it will only work when the AC is turned on.
When you park your car outside in the sun and walk away with no AC on, there won’t be any danger of overheating.