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Discussion Starter · #1 ·
the heater in my 94 sonoma wont get hot is this a common problem? I thought that maybe I had pulled one of the vacuum hoses lose when I pulled my stereo wires through but when I checked they where fine. I've replaced my thermostat and that didnt work. could it be my switch do those go bad????
 

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Mud Dummy
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Don't hold me to this but I'm 99% sure the vacuum controls the heat control valve, you may not have pulled it off inside but outside at the control valve. Good luck
 

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Discussion Starter · #3 ·
by outside do you mean the engine compartment? And where is it the control valve
 
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