"HvacTech2" wrote in message
...


Hi PrecisionMachinisT, hope you are having a nice day

On 27-Jan-05 At About 07:56:28, PrecisionMachinisT wrote to
PrecisionMachinisT
Subject: Heat pump icing up

P From: "PrecisionMachinisT"


P In a pinch you can force the condensor to defrost by putting the stat
P into cooling mode and setting the inside temp to about 40
P degrees.....the ice should all melt off it in about ten minutes doing
P it that way. Cold air will blow out the registers while that is
P happening.

This won't work due to the fact the outdoor motor will run. the only way
to
defrost it is to also stop the outdoor motor. This should not be attempted
unless you know what you are doing.


Try it sometime--I have on numerous occasions and it works fine on my Lennox
unit, at least in outdoor temps down into the low teens.........

Not to get into a ****ing match, but if airflow is blocked by ice then the
fan is running into a vacuum anyway and so there is no flow.

Granted it does work better if the outdoor fan is disabled, and if the
outdoor temp drops far enough then I suppose at some point it might not work
at all.

--

SVL