--OOOO--Audifox

In the last couple of months, the temperature has been cool in the car. I had the thermostat and two sensors replaced in the engine compartment. One is located behind the head, and the other is at lower radiator hose. The temp is still cooler than it used to be. Has anybody had this problem? A vag-com checked out ok. My car is a 2002 A4 1.8 Automatic. Thanks, Tony.

MikTip

after driving your car for a bit, until it reachs normal operating temp.

Then park it, shut off the ignition.

Then with your hand reach up and touch the black plastic parts above and to the left of the gas pedal.

This is where the heater core is.

The plastic should be rather warm-to-hot, so be careful!

--OOOO--Audifox

So what am I looking for? If it's too hot or to cold? Do u think it needs to be replaced? Thanks

MikTip

the heater core is right there, and it should be hot!

My guess, one of your electric flap motor drives is stuck...

--OOOO--Audifox

I will post a thread asking how I may be able to find this with vag-com.

MikTip

In the Bentley manual, describes testing and troubleshooting for the Positioning motors for climate control system and potentiometers -

Central Air Flap Motor V70
Central Flap Motor Position Sensor G112

Air Flow Flap Motor V71
Back Pressure Flap Motor Position Sensor G113
Defroster Flap Motor V107
Defroster Flap Motor Position Sensor G135

Recirculation Flap Motor V113
Recirculation Flap Motor Position Sensor G143

Left Temperature Flap Motor V158
Left Temperature Flap Potentiometer
Actuator G220 ,
Right Temperature Flap Motor V159
Right Temperature Flap Potentiometer
Actuator G221<ul><li><a href="http://www.rb.com">http://www.rb.com</a</li></ul>

Omega

I had the same problem where the heat was cold even though the engine was at 90C. It was because of air in the heating system. Their should be a tsb on it.

--OOOO--Audifox

Thanks Omega.

MikTip

Technical Service Bulletin, Audi sends to dealerships, about problems and fix's...