Bryant 517E inside and 661CJ024-B outside unit.
i have observed that;
when fan is blowing air down, there is frost on the outside.
when fan is blowing air up the coils have less frost. this lasted about 15
minutes, so I suspect this is the defrost cycle?
is this correct for this unit?
Actually, frost build up is normal on the outside unit of a heat pump. The
defrost control will defrost if the coil temperature is below freezing for
more than a predetermined time (1/2 to 1 hour). The outside fan should be
OFF during defrost. The inside resistance heating should be ON and the
inside fan should be on during the defrost cycle.
Frosting is normal, depending on humidity and temps. When a heat pump is
running, many people assume wrongly that the frost indicates a low charge
Its the reversal of the fan thats getting me....somethings out of whack
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.