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Old Feb 3, 2004 | 03:14 AM
  #1  
Bren4x4's Avatar
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no hot air while sitting

While driving to work the other morning....

I had the heat on high and the fan on high.
When i would stop at each light..the hot air would start blowing some what cold...then when i started driving for a minute..the heat would come back.

any idea's
 
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Old Feb 3, 2004 | 03:44 AM
  #2  
85 bronco xlt's Avatar
85 bronco xlt
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Check your water levels.

Then check to see if your water pump is pumping at a near idle.

My wifes subaru did this a few weeks ago. Ended up being the water level was somewhat low.

But the water pump was starting to fail however it would work above 2-3000 rmp.

Replaced the pump and the heat was back
 
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Old Feb 3, 2004 | 10:58 AM
  #3  
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From: Bend,OR
also might replace your thermostat could be stuck open or not opening up all the way.
 
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Old Feb 3, 2004 | 04:22 PM
  #4  
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chech and fill the radiator to the correct level. if this does not fix the problem than your heater core may be partially plugged.
 
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Old Feb 3, 2004 | 10:50 PM
  #5  
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Question

I noticed my F-150 is starting to do that a little bit, but what do you do about a heater core that is partially plugged. I believe thats the problem I'm having on my Bronco, but I'm also noticing that the temp gauge barely gets up off the "C" even after its been running all day. I just changed the thermostat on sunday but that didnt do anything. Any ideas??
 
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Old Feb 4, 2004 | 08:38 AM
  #6  
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From: Loveland, CO.
Low water level. At idle, not enough warm water is pumped back to the heater core. When you start moving and raise the rpm's, there is sufficient flow to get the warm water back to the core.
 
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