Overheating stumped?

Zman6000 · May 6, 2018

Hi guys I have an Audi TT 2001 225 it’s had everything and I mean everything replaced but it’s properly overheating now temp in the red yesterday outside my mates fans didn’t kick in, but when I turned it off fans kicked in? Is there any common issues with the fan speeds or relays? If anyone knows anything it would be greatly appreciated.
Hope everyone’s enjoying this sunny weather

desertstorm · May 6, 2018

Fans won't kick in until the sensor at the bottom of the radiator sees the water coming past it being too hot. If for some reason you have poor flow through the radiator or cooling cct it won't see temps that hot so won't bring the fans on. So I presume you have fitted a new water pump and thermostat?. Was the stat fitted correctly and was it a genuine item ?.
Check the wiring on top of the battery where the fuses are and make sure it's not fried. Does it overheat when driving or when standing in traffic?.

Zman6000 · May 6, 2018

desertstorm said:
Fans won't kick in until the sensor at the bottom of the radiator sees the water coming past it being too hot. If for some reason you have poor flow through the radiator or cooling cct it won't see temps that hot so won't bring the fans on. So I presume you have fitted a new water pump and thermostat?. Was the stat fitted correctly and was it a genuine item ?.
Check the wiring on top of the battery where the fuses are and make sure it's not fried. Does it overheat when driving or when standing in traffic?.

Yup fitted thermostat and water pump, and cts sensor, it wasn’t a genuine thermostat but never had a prob with one really and changed a fair few, it’s 27 degrees outside today this is the first time it’s actually overheated previously the temp would rise over half way but never go to the red? I’ll check the wiring and fuses ASAP and only overheated at stand still traffic? thanks buddy

Zman6000 · May 6, 2018

desertstorm said:
Fans won't kick in until the sensor at the bottom of the radiator sees the water coming past it being too hot. If for some reason you have poor flow through the radiator or cooling cct it won't see temps that hot so won't bring the fans on. So I presume you have fitted a new water pump and thermostat?. Was the stat fitted correctly and was it a genuine item ?.
Check the wiring on top of the battery where the fuses are and make sure it's not fried. Does it overheat when driving or when standing in traffic?.

Fuses and wires on top of the battery are fine, I’ll remove the battery tomorrow and check underneath, was thinking maybe one fan motor has packed up or thermostat switch on the rad might be faulty? May have to run a direct feed to see if the motors are working

Zman6000 · May 7, 2018

desertstorm said:
Fans won't kick in until the sensor at the bottom of the radiator sees the water coming past it being too hot. If for some reason you have poor flow through the radiator or cooling cct it won't see temps that hot so won't bring the fans on. So I presume you have fitted a new water pump and thermostat?. Was the stat fitted correctly and was it a genuine item ?.
Check the wiring on top of the battery where the fuses are and make sure it's not fried. Does it overheat when driving or when standing in traffic?.

Pulled fuse 16 both fans spinning, so am guessing it’s the control module buddy

Zman6000 · May 21, 2018

desertstorm said:
Fans won't kick in until the sensor at the bottom of the radiator sees the water coming past it being too hot. If for some reason you have poor flow through the radiator or cooling cct it won't see temps that hot so won't bring the fans on. So I presume you have fitted a new water pump and thermostat?. Was the stat fitted correctly and was it a genuine item ?.
Check the wiring on top of the battery where the fuses are and make sure it's not fried. Does it overheat when driving or when standing in traffic?.

Changed the control module still overheating when sitting in traffic no steam or smoke? Really scratching my head here buddy...

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Overheating stumped?

Zman6000

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Zman6000

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