Brrrrrrr N-n-n-n-no h-h-h-h-h-heat

[Ti Kan]

George Selby writes:
> While I was waiting for the sheets of ice to melt off my other car, I had 
> opportunity to look at the 89 Audi 80 heater situation again.  The 
> reservoir was empty (?)  but I filled it up again.  I let the car warm up 
> (fan going off and on) but still there is very little heat.  I set the 
> selector to defrost, and the windshield is slowly deicing, but if you put 
> your hand over the defrost vent the air feels cool.
> 
> I went under the hood, and felt all the hoses.  All the hoses are 
> pressurized and hot to the touch - except one of the heater lines is cool 
> to the touch (the other is the same temp as the rest.)  Is there some type 
> of heater valve in under the dash?

The type 89's heater system is supposed to have hot coolant flowing through
the heater core at all times, and the air temp is adjusted by mixing
cool ambient air with the heated air via air flaps.  So, if you're
getting no heat, either your coolant thermostat is stuck open, the
heater core is clogged, or the air flap isn't opening up the heated air
passages.

-Ti
2003 A4 1.8T multitronic
2001 S4 biturbo 6-sp
1984 5000S turbo
1980 4000 2.0 5-sp
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