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I have arcoaire thermostat (not digital) with Comfort Air FBA series system, vintage 1998. The bottom of thermostat has selections: ''EM Heat'' ''Heat'' ''Air'' ''Off''. I am not original owner. Q. Should i slide the selector to the EM Heat Position? The heat condensor has been running outside for some time, with snow around it and making a loud noise with fan. or is this normal?

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Yes go into electric heat for awhile. sometimes a heatpump will run constantlly when temps outside are not high enough./em heat mode untill temps rise or unit recovers.your unit should of gone into hot-gas defrost this maybe what your hearing. but remember electric heat is expensive to operate go back to your heatpump mode after system has a chance to recover.

Posted on Jan 31, 2010


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