Hello, We have two heat pumps for dual heating and cooling. The upstairs one seems to have a problem. First of all, we have digital thermostats installed and when the heat comes on upstairs to heat to the temp setting, it runs for a while and does not reach the set temp, the emergency (auxiliary) heat kicks on to bring it to the correct temp. What could be wrong with the heat pump. Our downstairs unit is fine which has larger ceilings and a bigger space. Help??
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