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  1. Heater only blows when the dash is hit

    Heating and Air Conditioning
    I recently bought a 1st gen 1994 s15 Jimmy. The people who owned it before me told me that the fan wont work for the heater unless you hit the top of the dash hard with your hand. Im wondering what the cause of this could be. I tried searching the forums and around online for what the issue...
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