1997 Ford Explorer Heater stays on high heat all the time. Ho can I fix this?

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  #1  
Old 03-17-02, 04:27 AM
Hawker
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1997 Ford Explorer Heater stays on high heat all the time. Ho can I fix this?

need some help
 
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  #2  
Old 03-17-02, 11:27 AM
Joe_F
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Burned blower resistor, stuck fan relay or melted switch connector.

See the links in my signature file for some ideas.
 
  #3  
Old 03-20-02, 07:54 AM
Hawker
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Heater on high

Thanks Joe and Knuckles for responding to my thread. In responce to your question, the heater control is a manual one. Recently, I had a new thermostat put in and have had this problem ever since. The mechanic that did the work has cars and appointments booked through the end of April and can't get to my vehicle until then. Is this something I can take care of myself? Someone told me the control was run by vacuum. I don't know.
 
  #4  
Old 03-20-02, 09:45 AM
Joe_F
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Call a Ford dealer and find out where the high blower relay is.

Tap on it with the blower on a setting other than high. If it now works properly, might be a stuck relay.

The control of the fan speed and the vacuum (where the air goes) on a manual system are generally not related. Neither would changing the thermostat.

Are you stating that it only WORKS on high or no matter where the switch is, it blows at high speed? There's a difference

A fan that only WORKS on high and doesn't work at all on the lower speeds is usually a burned out resistor.
 
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