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Fan starts to blow after turning off engine, for one minute

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If you were in slow driving the car would heat up and it had no cold air to cool it like on open road ,, the cooling fan would cut in even after turning off the key... very normal in modern cars ,,,,

Posted on Feb 13, 2012

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2000 caddy Seville ...after starting and engine warm turn on the heater and it blows cold air. Fan works / waiting for hot air and then all the sudden it kicks in. Engine at normal temp


Low coolant, if there is an air pocket in the engine it will make it to the heater core. Once there , the air coming out is cold/cool. Once the coolant fills the heater core, it gets hot. If the coolant is fine hot or cold, then have the HVAC system scanned.

Oct 09, 2016 | 2000 Cadillac Seville

1 Answer

My ac is acting funky. my ac will blow cold air as im moving. once i stop and idle for longer than 3 or 4 minutes, something will kick on and then it will start to blow hot air. as this happens, my car...


Start by checking to make sure that the a/c condensor and radiator is not full off debris. If the condensor and radiator were full of debris it will limit the air flow from the engine cooling fan which in tern will cause a high discharge pressure on the discharge on the a/c causing poor or no cooling at idle and could also cause vehicle to overheat. Check and make sure that the cooling fan as well as the condensor fan are coming on together when the a/c is turned on if equipped with 2 fans.

Sep 12, 2013 | 2004 Chevrolet Cavalier

1 Answer

My 2008 mazda cx9 fan started blowing after shutting off the engine, blows for one minute and quits


To a limited extent this is normal because the engine goes into a heat soak condition when it is shut down- hot areas with the water jacket surrounding it are still heating up from the residual heat in the engine.

Feb 12, 2012 | Cars & Trucks

1 Answer

Loosing antifreeze but no visible leaks and none in engine oil. Also heater blows cold. Could thermostat be causing it to blow it out of overflow tube?


Hello, you may be right on the money.

How to test the thermostat in most vehicles;

Make sure the heater is off, start the engine and let it run for 6 to 8 minutes, ( this will allow the
engine to reach, " normal operating temperature "), from the inside of the vehicle turn the heater
temperature on high and turn the fan speed on high.
1. Listen very closely for a click sound from the engine, ( most thermostats make a click when
they open )
2. Watch your temperature guage, it should begin to lower as the coolant starts to circulate.
3. Usually within a few minutes the radiator fan will kick.

What the thermostat does;

It seperates your coolant into two parts. The first part is in your engine, the second part is in your
radiator and the coolant reservior. When the coolant in the engine reaches the temperature rating
on the thermostat the thermostat opens to allow the two parts of coolant to change places. Now
the cooled coolant in the radiator and reservior flows into the engine while the heated coolant flows
from the engine into the radiator and reservior to be air cooled by the radiator fan.

I hope this helps you.

Feb 02, 2011 | 2002 Chrysler Town & Country

1 Answer

My heater is not blowing hot air consistantly...the fan works, the ac works, but the heat blows hot sometime and not others


Sounds like you have an air pocket trapped in the coolant system.This will cause intermittent heat and especially at idle with little water pump circulation.Try to remove the reservoir cap when not under pressure and start the engine.allow the engine to reach operating temp and allow any trapped air to escape for about 30 minutes.turn off the engine and allow it to sit without the pressure cap on for around 5 minutes.Top off coolant as needed and replace the cap.Let's see what happens from there.Hope this helps,
Kenneth R.

Oct 08, 2010 | 2003 Volkswagen Golf

1 Answer

I have a MB C220 CDI car (2002). As soon as I turn the ignition key, the suction fan starts moving at the highest speed. The coolant level is ok. One mechanic changed a fuse(7.5) in the CAN bus. The...


possibly be the same fault no power for engine can bus or no power for engine control module if CAN signal not receive the fan control unit from engine control unit fan start run at 100% speed if the same fuse blow again can be wiring short circuit or loose contact some wear or short circuit in the engine control unit when it's become hot.

Sep 06, 2010 | 2002 Mercedes-Benz C-Class

1 Answer

Cooling fan blowing relay


Generally speaking, any time you have issues with a relay or fuse blowing again and again, there is a short somewhere in the circuit. It could also be the fan motor going bad, but I believe that is less likely. Does the fan motor spin freely when the engine/key is off? Does it happen when turning the air conditioning on or when the fan starts from the engine coming up to temperature or both?

Jan 05, 2010 | 2003 Chevrolet Malibu

1 Answer

No heat air is blowing cold


First you have to identify what causes the problem.
To do this you have to:
1) When engine is cold check the level of coolant. If it is low fill it up.
2) Start engine and check if engine reaches regular temperature. If your engine is not heated enough it means your thermostat does not work properly and should be replaced.
3) If engine temperature is normal, then check the temperature of pipes that go to/from heater core. These pipes are located up the fire wall (easier access is from the passenger side). If pipe/pipes are cold (even engine is worm) it means you heater core is plugged and should be flushed. Keep in mind, flushing the whole cooling system is different from flushing heater core.
4) If pipe/pipes are hot/warm, turn off the fan, switch controller to the hot position, wait for 3-4 minutes and turn on the fan. Note if the cold air blows first or warm air blows first but it cools down in 5-10 seconds. If the air blows cold than it is most probably the problem with blend door or blend door actuator.
5) If air blows warm first and then cools down, then while running engine and remaining the transmission in PARKING position, press on the gas pedal until your engine reaches 3,000 RPM. Check if your heater blows warm/hot air. If it does, then your water pump does not work properly and should be replaced. If the air still cold, I would suggest to flush the heater core.

Oct 22, 2009 | 1998 Ford Taurus

1 Answer

MY 1998 FOR TARUS HEATER WILL NOT WORK.WAS DRIVING


It is most probably the problem with blend door or blend door actuator. But just in case I would suggest to follow the entire procedure:

First you have to identify what causes the problem.
To do this you have to:
1) When engine is cold check the level of coolant. If it is low fill it up.
2) Start engine and check if engine reaches regular temperature. If your engine is not heated enough it means your thermostat does not work properly and should be replaced
3) If engine temperature is normal, then check the temperature of pipes that go to/from heater core. These pipes are located up the fire wall (easier access is from the passenger side). If pipe/pipes are cold (even engine is warm) it means you heater core is plugged and should be flushed. Keep in mind, flushing the whole cooling system is different from flushing heater core.
4) If pipe/pipes are hot/warm, turn off the fan, switch controller to the hot position, wait for 3-4 minutes and turn on the fan. Note if the cold air blows first or warm air blows first but it cools down in 5-10 seconds. If the air blows cold than it is most probably the problem with blend door or blend door actuator.
5) If air blows warm first and then cools down, then while running engine and remaining the transmission in PARKING position, press on the gas pedal until your engine reaches 3,000 RPM. Check if your heater blows warm/hot air. If it does, then your water pump does not work properly and should be replaced. If the air still cold, I would suggest flushing the heater core.

Oct 17, 2009 | 1998 Ford Taurus

1 Answer

Heater not working


First you have to identify what causes the problem.
To do this you have to:
1) When engine is cold check the level of coolant. If it is low fill it up.
2) Start engine and check if engine reaches regular temperature. If your engine is not heated enough it means your thermostat does not work properly and should be replaced.
3) If engine temperature is normal, then check the temperature of pipes that go to/from heater core. These pipes are located up the fire wall (easier access is from the passenger side). If pipe/pipes are cold (even engine is warm) it means you heater core is plugged and should be flushed. Keep in mind, flushing the whole cooling system is different from flushing heater core.
4) If pipe/pipes are hot/warm, turn off the fan, switch controller to the hot position, wait for 3-4 minutes and turn on the fan. Note if the cold air blows first or warm air blows first but it cools down in 5-10 seconds. If the air blows cold than it is most probably the problem with blend door or blend door actuator.
5) If air blows warm first and then cools down, then while running engine and remaining the transmission in PARKING position, press on the gas pedal until your engine reaches 3,000 RPM. Check if your heater blows warm/hot air. If it does, then your water pump does not work properly and should be replaced. If the air still cold, I would suggest flushing the heater core.

Oct 17, 2009 | 1998 Ford Taurus

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