Humming noise
#1
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Humming noise
After the unit cycles and kicks off I noticed a humming noise in the outside unit when it is not running. What would be drawing power when the unit is not running? Is this normal?
#2
Yes it's normal.
It's the reversing valve coil keeping the unit in cooling.
If it really bugs you you could turn off all power, open the unit and tighten the nut or screw that holds the coil on the valve.
It's the reversing valve coil keeping the unit in cooling.
If it really bugs you you could turn off all power, open the unit and tighten the nut or screw that holds the coil on the valve.