Heater switch problem

77CapriceClassic · #1 09-01-2007, 01:52 AM

Back in April or so I bought my 77 Caprice. When I bought it, the heater/fan/defrost and all that worked just fine. Then I took apart the dash and put everything back how it was and never touched the heater controls and was careful not to move it too much. Well I put everything back to how it was and went to use the heater and defrost to see if it worked and it didnt. I could feel heat trickling out of there but the fan wasnt blowing. Then a few weeks ago my friend was messing around with it and randomly got the fan to start blowing. Is there something I should look for thats loose maybe? Or how should I go about fixing this? Any help would be greatly appreciated.

silicon212 · #2 09-01-2007, 02:35 AM

The switch probably needs replacing. Not the motor switch, but the heater switch (the slider on top). These have a plastic clip in them that tends to break, and when they do - you lose most everything.

77CapriceClassic · #3 09-01-2007, 02:38 AM

Quote:

Originally Posted by silicon212

The switch probably needs replacing. Not the motor switch, but the heater switch (the slider on top). These have a plastic clip in them that tends to break, and when they do - you lose most everything.

Are you talking about the one thats inside the car above the radio? If so are they easy to find?

silicon212 · #4 09-01-2007, 02:40 AM

Quote:

Originally Posted by 77CapriceClassic

Are you talking about the one thats inside the car above the radio? If so are they easy to find?

Yes and yes. It was a very common part - yours will interchange with mine and vice versa. Used on LOTS of GM cars from the 70s into the 90s.

When the plastic clip broke on mine, I put it back together with a locknutted bolt instead. It's a trick to get the three springs inside lined up properly, though.

77CapriceClassic · #5 09-01-2007, 02:46 AM

Quote:

Originally Posted by silicon212

Yes and yes. It was a very common part - yours will interchange with mine and vice versa. Used on LOTS of GM cars from the 70s into the 90s.

When the plastic clip broke on mine, I put it back together with a locknutted bolt instead. It's a trick to get the three springs inside lined up properly, though.

Alright then, thanks for the help!

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