Hello all (especially Tech):

The air flow from my defrosters seems weak. Even on max fan, if I switch to the cabin vents air pours out.
Selecting the foot/floor vents only or defroster only it seems very weak and you can hear the air pressure in the system change, or build up.

Since winter is upon us, I need good defroster capability.

My questions:

Is the air flow control(s) vacuum or electric? (I am used to the vacuum modules on most cars but I do not know if Volvo uses these)

How does one access the defroster control module/motor to inspect/replace it?

Any adjustments?

Thanks,
Ron Y
1999 C70 Convertable

 

It is an electric motor.

It might need to be recalibrated. (Dealer only)

They are located in the air box under the dash on the drivers side.

I forget which one is for the Defrost though. There should be 3 there.

 

Thanks Tech. I will call my dealer.

How was your trip back from NJ a few months ago? Too bad we could not connect. I think I left my email after you were on the way up.

Thnaks again,
Ron

 

The trip was ok.
I was driving a convertable car that the top stopped Half way down on the trip.
Also had no radio.
But all was good.