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79porsche · Posted: Fri Dec 29, 2006 3:06 am Post subject: Lazy Heater Fan

The heater fan on my 79 does not hardly move enough air to tell that it is actually "on" when driving the car. The fan does blow...and when I move the lever from low to high....I can tell that the fan speed increases. But just in gereral....it runs way too slowly. Anybody had similar problem and what solved it? Wanted to get a head start before I tore things apart. Thanks guys!

Ozzie · Posted: Fri Dec 29, 2006 6:36 am Post subject:

The bearings on the fan are probably dried out and wearing away.
Nearly time for a new one I'd say.
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Porsche 924 1984 (UK import) NA
Its AUTO and its BLACK
Montego Black on black/red
Engineer of Electro/Mechanical Systems Maintenance

79porsche · Posted: Fri Dec 29, 2006 8:11 am Post subject:

What should the voltage levels be at the fan motor for the various fan blower lever settings?

Rasta Monsta · Joined: 12 Jul 2006 Posts: 11733 Location: PacNW

I would bet position 3 is 12v.
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WeiBe (1987 924S 2.5t) - 931 S3

Joes924Racer · Posted: Fri Dec 29, 2006 8:51 am Post subject:

or the vent channels various connections from the heater to the outlet
become seperated and the air ends up not reaching the vents

.. the heater motors have brushes right. .. maybe there worn out.
or need adjusting .. I had to solder a wire back on there..
once and took a look around though it was a while ago.
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1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.