Mechanics

HEATER BLOWS COLD

1990 Ford Bronco • V8 4WD Automatic • 168,000 miles

My heater blows cold air I flushed and changed the coolant and replaced the thermostate
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Surveyor680
January 14, 2011.



Check the heater core, heater control valve and the air blend door.

Rasmataz
Jan 14, 2011.
You may have an air bubble stuck in the heater core. Also the heater control valve might be stuck if you back - flushed the system without removing it. The thermostate might not be any good, & needs to be tested to see if it opens.

Ford Man in Michigan

Tiny
Ford Man
Jan 14, 2011.