jbarsalou

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!

__________________
1997 Blazer 2 door 4wd AT
1998 Blazer 2 door 4wd M5
2002 Mecham TA #002 M6
2002 Trailblazer LTZ 4wd

vando002

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!

MT-2500

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

BlazerBoyLT98

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!!!!!!!!

jbarsalou

Manual controls. I'll check for vacuum. Do the shutters run off vacuum? Thanks!

__________________
1997 Blazer 2 door 4wd AT
1998 Blazer 2 door 4wd M5
2002 Mecham TA #002 M6
2002 Trailblazer LTZ 4wd

MT-2500

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