Audi q7 radiator fan runs all the Time ....?
05-31-2015, 08:45 AM
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Audi q7 radiator fan runs all the Time ....?
I have 2009 audi q7 TDI , now Radiator fan runs all the time . when you start engine {even cold] fan start to run after 10 sec then stay running until I turn engine off. Is it normal ? thanks
05-31-2015, 09:48 PM
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if bad temp sensor , should engine light come on or not . no engine light on in dash . what could be wrong with HVAC ? How can I know , which one wrong ? thanks for your help
06-03-2015, 08:24 AM
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The coolant temperature sensor sends a varying signal to the ECU that reflects the engine temperature. It could be sending a higher than normal signal that turns the coolings fans on but not a code.
There only a couple of things that will energize the cooling fan. One is a high engine temperature and the other is the A/C compressor running. The fan assures air flow over the condenser coil located in front of the radiator.
I would suspect a sensor sending the wrong signal. Can you check that and compare it to the actual engine temperature?
edit: there could be other inputs turning the cooling fans on with the diesel engine
There only a couple of things that will energize the cooling fan. One is a high engine temperature and the other is the A/C compressor running. The fan assures air flow over the condenser coil located in front of the radiator.
I would suspect a sensor sending the wrong signal. Can you check that and compare it to the actual engine temperature?
edit: there could be other inputs turning the cooling fans on with the diesel engine
06-03-2015, 07:02 PM
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when I scanned today I got code
001153 coolant fan control curcuit 2 , P0481
001152 coolant fan control curcuit 1, P0480
it start to run fan all the time when I added one can of ac refigerant . then start to run fan all the times. thanks
001153 coolant fan control curcuit 2 , P0481
001152 coolant fan control curcuit 1, P0480
it start to run fan all the time when I added one can of ac refigerant . then start to run fan all the times. thanks
Last edited by jack1568; 06-03-2015 at 07:38 PM.
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