1999 Chevrolet Blazer No Floor Heat

CHEVROLET BLAZER
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GLEN133
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1999 Chevrolet Blazer. 4.3 Engine 85270 miles: My Heater will not blow onto floor. it will switch to defrost or Panel {face} only. you can switch it to floor but it comes out up top. any suggestions. :(
Feb 6, 2007 at 7:52 AM
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SERVICE WRITER
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Sounds like it may have a broken control lever that operates the vent flap (valve) to allow air to move. It's in the heater box, in the dash.
Feb 6, 2007 at 10:00 AM
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FFAS23
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[quote:71bbec707d="GLEN133"]1999 Chevrolet Blazer. 4.3 Engine 85270 miles: My Heater will not blow onto floor. it will switch to defrost or Panel {face} only. you can switch it to floor but it comes out up top. any suggestions. :([/quote:71bbec707d]

Get a flashlight and take a look under the dash. It may just be a vacuum hose that disconnected that opens that duct.
Feb 7, 2007 at 12:20 AM

Suggested Repair

Inspect the heater box under the dash for a broken control lever that moves the vent flap, and check for a disconnected vacuum hose that opens the floor duct.

Conversation Summary

A 1999 Chevrolet Blazer heater will not direct air to the floor; selecting floor still sends air to the upper vents, while defrost and panel modes work. An expert suggested a broken control lever for the vent flap inside the heater box. Another reply suggested checking under the dash for a disconnected vacuum hose that opens the floor duct.

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