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You are watching: 1990 chevy 1500 climate control not working


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Ok everyone new here and new to car forums so right here we go. Currently working on restoring/modernizing my "90 k15 and also when I obtained it had to rewire a many things within the dash area to obtain somethings consisting of heater to job-related properly. Currently I acquired my blower to job-related via my control module and put out warmth without leaking after additionally putting in a heater core. Brand-new problem is hardly any air is coming the end the vents, and when I press my defroster switch the digital display begins to speed the defroster symbol and also the temperature display and also the air control display. No idea what is wrong need some pointers whereby to look and get me part air blow so once I re-do mine AC that will job-related properly as well. Many thanks in advanced
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Greg2001 Silverado 2500HD xcab lengthy bed 8.1/Allison 1000"The just thing essential for evil to triumph is for good men to do nothing."
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Thi is that only begins to flash once defroster is selected I have a video
Is the the original manage panel for the 1990? i wasn"t positive however I assumed 88 - 91 didn"t have actually the "RECIRC" button however maybe simply the 88 - 89 didn"t? This will make a difference because you"ll have actually a High pressure shutoff switch on the earlier of the compressor as well as the Cycling switch on the low side. The older ones didn"t have actually the HP switch. As far as her panel lamp flashing when transforming on the defroster, I"d imply disconnecting the mix door motor and also see if it stops flashing. That motor might be illustration down the voltage to the point the lights don"t get sufficient power to continue to be on. The motor might be the end of place (trying to move against a dead stop), shorted, or have actually a weak ground.
That to be the one that come out of my 91 the I supplied to drive however is now a components truck, however problem is when I choose defroster that blows waiting for perhaps a minute yet then once the flashing begins it quits.

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