Heating unit is freezing

[doc2critters]

I don't understand why but my heat pump unit is freezing the vent openings on two sides. The house is keeping temperature okay, but the unit sounds really loud when it cuts on.. Any thoughts as to what the problem could be. A Service man came out about a month ago and found some minor connectors that needed replacing. It wasn't working then. been working fine except noticed the freezing..

Please help...

[irregularjoe]

sounds like low freon.

Did you ever see OHM'S mother in LAW?...... SHOCKING!

[doc2critters]

[quote]Originally posted by irregularjoe

sounds like low freon.

I have the heat on, not the AC why would freon be an issue.

[irregularjoe]

Freon is used in both cooling AND heating in a heat pump.
And usually when you have icing on the coils it indicates low freon.
Of course it could be other problems too, like a bad reversing valve.

http://energyoutlet.com/res/heatpump/how.html

Did you ever see OHM'S mother in LAW?...... SHOCKING!