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  1. A

    1996 ford explorer with fluctuating temp gauge

    I had this same problem and, after dealing with this off and on for years, I noticed that it doesn't happen when on max air conditioning or if the heater selector is off. Both these settings cause the vacuum-operated heater bypass valve to bypass the heater core. It seems that there is not...
  2. A

    1996 Explorer 4.0L Fluctuating Temperature Gauge, Steam Thumping - Fix

    Same problem and solution I had the same problem and came to the same conclusion after a lot of parts replacement. I finally noticed that when the heater selector was on no heat or max air that the problem went away. Then I realized these were the only two positions where the heater core was...
  3. A

    1996 Explorer 4.0L Fluctuating Temperature Gauge, Steam Thumping - Fix

    Same problem and solution I had the same problem and came to the same conclusion after a lot of parts replacement. I finally noticed that when the heater selector was on no heat or max air that the problem went away. Then I realized these were the only two positions where the heater core was...
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