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acnerd
19-10-2010, 10:35 AM
I was recently told by a technical department that an ac system that is short of refrigerant would be more apparent in HEAT mode rather than COOL mode; based on air on/off temperatures on indoor units.

I always understood that HEAT mode used heat of compression as well as phase-change to generate really efficient heating that demanded less power input. And in COOL mode you relied only on refrigerant phase-change for cooling effect.

Can someone please explain this to me?
Thanks

Brian_UK
19-10-2010, 11:42 PM
Explain what?

The phase-change statement or the tech dept statement?

acnerd
20-10-2010, 09:02 AM
Explain why a lack of refrigerant is more apparent in HEAT mode rather than COOL mode?