Originally Posted by Bama Rambler
Iwannacamp-- Our 15,000 BTUH A/C failed shortly taking possession of the unit. On ours the compressor would make a loud buzzing/humming noise and then trip off.
The service tech said that high pressure was causing it to do that. Not sure how he figured that out. If it was then your belief that it was a charge issue makes sense.
High pressure almost has to be dirty, restriction, fan/airflow(aka dirty in most cases) this doesn't go along with premature failures. I guess they could be overcharged from the factory. I suspected under charge.
It could also be some people are running on low speed a lot...if this is controllable. IMHO you should run them on high...most airflow possible. I suspect these are not multi speed compressors. You need all the condenser air you can get...especially in hot weather.
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