My son had a similar problem and we found out the unit had a small leak at the flare (sniffer found it). So we sucked gas out, re did flare (my fault as I was not as careful as I should have been originally) and filled using weight not psi.
Interestingly, the unit worked OK for cooling, but not heating. The tech at Gree told me about checking for a leak. Trying to get schematics for these units is tough.
Now works like a charm. I hope it is that simple for you.
Thanks for ALL your posts in the past!
Steve
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consulting on geothermal heating/cooling & rational energy use since 1990
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