Question about 1992 Chevrolet K1500

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In dash heating/air unit -

My husband replace the in dash heating/air control unit per adivse from someone... it had stopped working out of no where. we ordered the part online - he put it in and.....nothing no lights no action... is ther a fuse or something we are unaware of or i dunno anything? just trying to save hundreds at a shop... can't hurt to throw it out here....

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  • tofast4aford May 21, 2009

    my heating ac unit went dead,i thought it was a fuse so i checked it was good,about a week later it came back on all lights everything,its a 92 chevy 1500 then a week later dead no lights exept the ones that come on when you turn your headlights on ,ive got power at the plug for the unit when you turn the key on and another when you turn headlight on,so i got anther unit from junkyard was the same exept didnt have the recr button on it,would work so exchanged it for one like it it didnt work eather.wonder if it has to have the recerculat button on it?i didnt think that would matter?



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First check the fuse for the heater A/C then check the blower motor relay it is a silver unit mounted right on the heater unit by the blower motor, then check the blower motor resistors mounted on the outside near the heater core if they all checks ok i woud pull the control unit out and check the mail wires that were plugged in to see if there is current battery voltage should be present atleast on two of them then i would check if the black wire is a good ground!!!.

Posted on Nov 15, 2008


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