My aprilaire 8400 series was installed yesterday. We set it at 74 and it did fine through the night. I left for a few hours this morning and found it set at 85..no one was home that did this. This happened once yesterday, too. Is there a problem with the thermostat?

Asked by Gail on 07/15/2013 0  Answer

ManualsOnline posted an answer 11 years, 4 months ago

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