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Old 10-28-2021, 06:14 AM   #1
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New Mach 8 no heat

I have a Fleetwood Revolution with two Coleman heat pumps. My rear unit never worked on heat and I assumed it was a bad reversing valve. I did confirm it was a heat pump my checking the model number. When it died I was able to replace it with a brand new Mach 8 heat pump but I am still having the same issue.

When I installed the new unit I did reuse the existing control board and at the same time upgraded to the MicroAir thermostat. It is set to allow electric heat on zone 2.

Could I need a new control board?
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Old 10-28-2021, 08:37 AM   #2
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Best thing to do is to very carefully go through the set-up procedure for the new thermostat and make sure it was rewired correctly. On the control board in the unit, make sure you did knock off any wires and jumpers when you reinstalled the control board.

Ken
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