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Q: a/c working fine but approx every 10 mins the air blows hot for couple mins on 1997 Ford Explorer

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
heater switch only works a/c on full, not normal setting
No car image 94a1663db56199c5353592009e34aaa51078a2469bed068bb8d6f0ba43accf97
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Is it the A/C or the fan that only works at the high setting? in other words in the heat mode does the fan operate normally?
the fan works on all speeds. the a/c only works on "high" setting.could the problem be something to do with the hot/cold switch.checking to see if it is vacum or cable operated. thanks
it could be the resistor pack that controls the fan speed....try getting a repacement at a junk yard (aka recycle yard)
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