heater blows cold

1990 FORD BRONCO
168,000 MILES • V8 • 4WD • AUTOMATIC
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SURVEYOR680
  • MEMBER
  • 1 POST
my heater blows cold air i flushed and changed the coolant and replaced the thermostate
Jan 13, 2011 at 7:40 PM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Check the heater core,heater control valve and the air blend door.
Jan 13, 2011 at 7:56 PM
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FORD MAN
  • MEMBER
  • 115 POSTS
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
Jan 13, 2011 at 9:04 PM
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