The Temp Sensor in my four button CCC went bad and wouldn't turn the furnace off. Replacing a four button CCC is an expensive project since they aren't in production any more and to convert to a five button involves changing both control; boards in the Air Conditioners. I already had one of these in my rear zone and it works fine so I just added this new one to the front A/C control board and all is well again. I believe the location of the new sensor id better located than the CCC so I win on two counts.
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