Heat pump frost

[Dsorgnzd]

I have two heat pumps, one for the first floor, one for the second floor. They are identical as far as I know. The outside units are located side by side (about 3' apart). Recently I noticed that, on humid days, when frost forms on the outside units, one of them will have a uniform layer of frost from the top of the coils to the bottom, while the other has frost only on the top 3/4 of the coils. Might that indicate a less than full charge on the unit that develops no frost on the bottom 1/4 of the coils, or any other problem? Or is it normal? I've lived in this house less than two months, after 19 years in a house with gas forced air heat, so there's a lot about heat pumps I don't know yet.

[Bubba]

Impossible to tell from what you posted. You dont even know if the two units are exactly the same. Did you ever think to maybe bend down and read the model numbers to see if they are the same? NO, I didnt think so. That would take some effort on your part. Is the temperature and humidity on the first and second floor exactly the same at all times? Do both units come on at exactly the same time? Run the same length of time? Shut off at the same time? It could be low charge, overcharge, poor air flow, excess air flow or they could both be running perfectly fine. Find a good tech that knows how to do superheat, subcooling, static pressures and can read charging charts. Simple enough, eh? Bubba

[bill a]

are all hvac people rude, or just the ones that post here?????

[Bubba]

Are all top posting homemoaners that stupid or just you? Im sorry you cant handle the truth. Bubba