I live in Montreal, Canada....
This time of year it is approx 65 and the nights get as low as 55 to 60 degrees.
Today I have noticed snow/frost build-up on 60% of the surface of
the heat pump, is there something I should be doing about that?

Marcus Miller
Dear Dan:
Thank you for writing to me. When the temperature gets below 55 sometimes the heat pumps will ice up as the coil is about 20 degrees colder than the outside air temperature. That is normal. Then when they get too much ice the heater will either shut down and wait until it defrosts, or if the heat pump is so equipped, it will go into a hot gas defrost cycle and melt the ice and start heating again. Most heat pumps don't have that feature as it is expensive and they just wait until the next day when it warms up a bit to start heating again. There are also some situations when it is in the 60's and 70's and the heater ices up. That could be a low freon situation or a bad fan motor, and the heater will need to be looked at by a heating and cooling company. I hope that helps.

Asa Strong
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