Outside temp too low, so outside thermostat and it's settings will not allow the heat pump to work. But insist on the ausilary heat to work instead. Heat pumps usually do not produce enough heat when below 40F outside temp. If you have Gas heat, it may be more economical than the heat pump below 40F. If electric auxilarry heat, it may compete at 32F. Talk to your dealer, installer, or manufacture.
Ok...I do live in Indiana...and its been cold! This unit is in my all seasons room...and I've had it for 5 years...I just don't ever remember the compressor NEVER kicking in. However, no error codes or funny noises. So, I'll wait for spring and see?! I haven't found anyone in my area who will work on...so, this is why I posted. I sure appreciate your time!
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