Will pass on the uploader valve info to customer's A/C tech. Other than that, breaker is only a couple of months old now and busbar appeared to be fine. Keep in mind noise was with old breaker and now again with new breaker. Could the breaker be being pushed to trippage point causing the buzzing noise? Obviously, the LRA's of 145 has to be partly to blame. What do you think?
A high head pressure caused by a bad unloader valve makes the amperage increase. The noise is the breaker getting ready to trip. If it doesn't and the compressor starts, then it is overcoming the high head.There should be a WOOSH of air when te compressor stops, if not the valve is stuck or shot.
Will review and discuss with customer and A/C tech and I am very grateful for the valuable information. Thank you! Might be contacting you again in near future to continue the topic.
Palm Beach County, Florida