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No Hot Air from Heater/Defroster - 1994 Blazer
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bald1247
New User
Jan 24, 2007, 10:44 AM
Post #1 of 2
(1789 views)
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No Hot Air from Heater/Defroster - 1994 Blazer
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I have a 1994 Chevy Blazer 4x 4. Recently had the water pump, thermostat and heater line hoses replaced.
Last year I replaced the dash controls and blower motor.
I have unplugged the electrical wires going into my AC/Compressor as the bearings went out and I have not replaced the compressor.
My problem is that I am only getting cold air blowing when I turn on my defroster or heater. The heater hoses going to the heater are warm.
My mechanic thinks it is a vacuum issue to the outside vent doors. He replaced the one controller on the firewall I think. When he tests the vacuum system and puts it under pressure the doors close. When he takes off the tester, the doors open again.
Any suggestions?
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Jan 24, 2007, 11:33 AM
Post #2 of 2
(1787 views)
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Re: No Hot Air from Heater/Defroster - 1994 Blazer
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A very plugged heater core could do this or still some problem with the diverter doors or the controls of them, T
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