Our heat pump could blow hot air but always had a hard time blowing cold since we installed it. The pipe outside was frosted and it would try to blow cold air and give up after 5* below ambient giving a sawtooth waveform at the output temperature.
Put .8 lbs in and it started running as expected. Been 2 weeks without issue.
My unit is now 2 years old and am again using it this summer after recharging it last fall when it had leaked all the refrigerant. It is working great and hasn't leaked any more as far as I can tell. Very satisfied with the product.
Works amazing, recharged my Mini split!
With the use of a clamp on BPS valve, recharging was easy and the unit is cooling again. Still not able to find a leak with pressure back to normal. Probably won't know if sealant has worked until next summer.