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1993 Ranger - Heat abruptly stopped during normal operation !

sjerseyj

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I could really use some help with this (I have a ?93 3.0L with factory air)?.I was cruising along on a cold day with the heater blowing out plenty of heat, then about 40 minutes into my trip, I started to notice that cool, then cold air started to come out of the floor and console vents. I tried shutting off the heat, and moving the heating controls around, but no heat. Vehicle temperature range was fine (right in the middle of the temp gauge) and I didn?t notice any other issues. Checks of heater hoses found both of them hot. Additionally total flush of the system occurred around a year before and the heater core, along with thermostat, were replaced at that time as well.

After some research, I noted that there were discussions around heater control valves or heater control door issues when this problem arose when everything else seemed to be working OK, but when I went to look for the related parts for the 1993 model year, I couldn?t find anything specific to this. Does the 1993 3.0 engine have a heater control valve? If not, what regulates the heat output, a heater ?blend? door mechanism? Any thoughts, insights and/or part numbers would be most appreciated?.
 

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