When does the car cooling fan turn off?
Again, the HVAC is off. Once the car is started, the cooling fan will remain on until the car is shut off. The fan is running as such a high speed you can hear it over the noise of the idling engine. Once I turn the car off the fan shuts off.
Is the cooling fan always on on a Subaru Outback?
Cooling fan is always on, even runs when engine is cold. Our 2011 Subaru Outback 3.6R, which we bought brand new back in Feb ’11 and only has 4k miles, seems to be having issues with the cooling fan. The cooling fan will come on when the engine is cold and it will stay on the entire time the engine is running.
Why does my car run when the ignition is turned off?
With the ignition turned off and the car continuing to run, simply remove the plug from the alternator (DO NOT TRY AND REMOVE THE BATTERY POWER WIRE FROM THE POWER STUD!) and the car should shut off if the alternator is creating the problem. If it does not stop running, your feedback problem is coming from something other that the alternator.
Why does my alternator run when I Turn Off the car?
Generally, an OEM harness will not have the problem of alternator “run-on”, as there is usually a resistance wire in the dash harness to keep this from happening. Solution: To figure out where the problem exists, start the car and with the key in the ON position and the car running, turn off the key.
Why does my radiator fan start at a high speed?
On a cold start, my cars radiator fan starts up but at high speed (sounds like a jet engine). it is below 30 degrees out and i have my heat and a/c off. once it starts up it never stops for the full drive. this started about 3 days ago and now my check engine light came on.
What happens to the coolant when the engine is turned off?
When the engine is running, the coolant circulates from the engine and flows to the radiator, where heat is dissipated. When the engine is turned off, the coolant doesn’t circulate, and the heat stays trapped, therefore prolonging the engine from cooling. Running cooling fans help cool down the engine even after you turn off the car.
Why does the cooling fan come on when the engine is cold?
Every time I go to start the car after it has been sitting for an entire day and the engine is cold, when I turn the key to the “On” position, before the engine is even started, the cooling fan comes on. How is this possible when the engine isn’t even running and the engine is cold. Again, the HVAC is off.
Why are the cooling fans not working on my car?
Many other issues can cause the engine to run hot or overheat. Rather than uncommonly high engine temps, the driver may notice that the cooling fans have stopped running. A faulty or broken relay cannot deliver power to the cooling fans. In turn, the unpowered fans won’t run, leaving the radiator to its own devices.
What to do if your Ford F150 cooling fan runs on high all?
Unplug the cooling fans. Remove the high speed fan relay. With the key on the relay should be getting 2 power pins but no ground pins. If your getting a ground, then unplug the PCM, if your still getting a ground then there is a wire short. If the ground goes away with the PCM unplugged then use a diagnostic tool to monitor the coolanttemp sensors.
On a cold start, my cars radiator fan starts up but at high speed (sounds like a jet engine). it is below 30 degrees out and i have my heat and a/c off. once it starts up it never stops for the full drive. this started about 3 days ago and now my check engine light came on.
Can a bad fan relay cause an engine to overheat?
However, a bad cooling fan relay isn’t the only culprit for excessively high engine temperatures. Many other issues can cause the engine to run hot or overheat. Rather than uncommonly high engine temps, the driver may notice that the cooling fans have stopped running.
What to do if your cooling fan won’t turn on?
Pull the cooling fan relay out of the box. Replace the cooling fan relay with a new one. A stuck closed relay is the only thing that can operate the cooling fan continuously with the key off. The computer looses power with the key off and the same applies to the coolant temperature sensor.
When does a computer fan turn on and off?
The computer turns the cooling fan on and off when it receives a temperature indication from the coolant temperature sensor. When the temperature exceeds a specific value — usually 215 degrees Fahrenheit — the computer will turn the fan on.
When does the thermo coolant fan switch shut off?
As engine temperature rises to a specific threshold, the switch is activated powering on the coolant fan. The coolant fan will continue to run until the engine temperature cools down to a specific predetermined level. Once the temperature reaches this cooling stage, the coolant fan will shut off.
Pull the cooling fan relay out of the box. Replace the cooling fan relay with a new one. A stuck closed relay is the only thing that can operate the cooling fan continuously with the key off. The computer looses power with the key off and the same applies to the coolant temperature sensor.
Why does the cooling fan run after the engine is shut off?
The rise in the temperature of the water after the engine is shut off is because of the residual heat in the engine and the lack of further airflow across the radiator – hence the running of the fan. SteveF
When does a computer turn on a cooling fan?
When the temperature exceeds a specific value — usually 215 degrees Fahrenheit — the computer will turn the fan on. The operating components in the cooling fan circuit include the cooling fan fuse, relay, coolant temperature sensor and the computer.
Again, the HVAC is off. Once the car is started, the cooling fan will remain on until the car is shut off. The fan is running as such a high speed you can hear it over the noise of the idling engine. Once I turn the car off the fan shuts off.
Why are my cooling fans running at all times?
3. Cooling fans stay on at all times. If the cooling fans are staying on at all times, this is another (less common) symptom of a possible problem with the cooling fan relay. If the relay shorts internally, it may cause power to be permanently switched on, which will cause the fans to run at all times.
Cooling fan is always on, even runs when engine is cold. Our 2011 Subaru Outback 3.6R, which we bought brand new back in Feb ’11 and only has 4k miles, seems to be having issues with the cooling fan. The cooling fan will come on when the engine is cold and it will stay on the entire time the engine is running.