96 passat heater problem

It's a Regular engine NOT Diesel one.
Blower works fine, but the air is not hot. All the speeds work.

In the parking mode, blower is blowing non heated air. Even after the
engine reaches it's normal working temperature, the air is still non
heated. Once I put the car in drive mode and start moving forward, hot
air comes through.

Yesterday when I returned to home I put the car in parking and didn't
switch off the engine. Heater worked fine. Hot air was blowing till the
engine was on. I switched off the engine and started it again, the same
problem was there. I had to put in drive and move the car forward to
make the heater work.
 >> Stay informed about: 96 passat heater problem 

So if a USA model the engine is either a 4 cyl (2.0 engine) or a 6 cyl (VR6
engine).

Check for any mechanical/vacuum problems that might cause the fresh air
(heater box) box to allow the air to bypass the heater core and not get hot.
Then with you driving some the vacuum gets strong enough to open or shut
doors/valves in the fresh air box.

I had thought that the fresh air box was controlled by cables, but I could
be wrong.

good luck and let us know what you find.
later,
dave
(One out of many daves)


"PK" wrote in message

> It's a Regular engine NOT Diesel one.
> Blower works fine, but the air is not hot. All the speeds work.
>
> In the parking mode, blower is blowing non heated air. Even after the
> engine reaches it's normal working temperature, the air is still non
> heated. Once I put the car in drive mode and start moving forward, hot
> air comes through.
>
> Yesterday when I returned to home I put the car in parking and didn't
> switch off the engine. Heater worked fine. Hot air was blowing till the
> engine was on. I switched off the engine and started it again, the same
> problem was there. I had to put in drive and move the car forward to
> make the heater work.
>
 >> Stay informed about: 96 passat heater problem