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#1
06-19-2007, 12:16 AM
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98 Blazer heating problem
My 98 Blazer's heat only comes out of the top of the dash no matter which setting is on the selector. Any ideas? Thanks!
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2008 GMC Sierra Denali AWD 2002 Mecham TA #002 M6 2002 Trailblazer LTZ 4WD 
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#2
06-19-2007, 11:24 AM
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Re: 98 Blazer heating problem
Take out the panel where all the switches are and see if something got disconnected. There might be a plastic piece that moves the vents from the windshield to the front vents that's broken. My Breeze did the same thing all winter then in the summer I turned on the a/c and now those damn front vents work again!
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#3
06-19-2007, 12:46 PM
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Re: 98 Blazer heating problem
Automatic or manual ac/heater controls?
Got good engine vacuum from engine to it?
__________________
Remember proper testing gives us the answer to many problems. MT
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#4
06-19-2007, 05:26 PM
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Re: 98 Blazer heating problem
I would agree with MT sounds like a vacuum issue.
__________________
2002 Pontiac Gram Am K&N Air Filter Mobil1 5W-30 Extended 15K 2 JL Audio 12" Subs Sealed JL Audio Box Coustic 400 Watt Class D Mono Amp Pioneer Head Unit 50X4 MP3, WMA, AAC Super Tuner Polk DB750 6.5" all around Yankees Suck!!!!!!!!
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#5
06-20-2007, 12:20 AM
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Re: 98 Blazer heating problem
Manual controls. I'll check for vacuum. Do the shutters run off vacuum? Thanks!
__________________
2008 GMC Sierra Denali AWD 2002 Mecham TA #002 M6 2002 Trailblazer LTZ 4WD
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#6
06-20-2007, 09:42 AM
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Re: 98 Blazer heating problem
Yes a lot of it is vacuum controlled.
Check vacuum line at engine and vacuum tank. MT
__________________
Remember proper testing gives us the answer to many problems. MT
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