Heat Problem - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 12-29-2003, 02:51 AM   #1
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Default Heat Problem

I need some help. I have a 93 bonnville and the heat sucks. the heat does come out hot but it doesnt blow strong at all. i have alrady replaced blower motor and checked the resinator also checked the switch inside i can use any help you have thank you.
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Old 12-29-2003, 03:04 AM   #2
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my park ave had the exact problem, what i did was remove the blower motor, and scrub at the core, then use an air compressor to get as much crap out of the fins as possible..warning could make a mess of your interior so id recomend covering it with plastic.
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Old 12-29-2003, 03:55 AM   #3
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There'* a procedure in Techinfo for cleaning the core.

Moving this to Mechanical and Maintenence 92-99.
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Old 12-29-2003, 04:14 PM   #4
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Old 12-30-2003, 01:48 PM   #5
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Default Re: Heat Problem

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Originally Posted by 93BonnevilleSe
I need some help. I have a 93 bonnville and the heat sucks. the heat does come out hot but it doesnt blow strong at all. i have alrady replaced blower motor and checked the resinator also checked the switch inside i can use any help you have thank you.
I imagine your A/C doesn't work either, and most commonly the problem is that the evaporator sprung a leak and covered itself in sticky oil, which traps dirt, and eventually clogs airflow through the car. (The evaporator sits in front of the heater core.) The cleaning procedure in TechInfo is designed to clean as much goop as you can reach from the front of the evaporator. Good luck...
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Old 12-31-2003, 06:16 PM   #6
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Thanks for the advice it worked.
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