jtt633 -
Time for a new shop, IMHO. Some things are easy to do wrong, even for a very good pro. This may very well be one of them. The best of us make mistakes, or don't know certain things.
But. Let me tell you a story.
A few weeks back my (former) girlfriend's heat pump started making a hideous noise at times. So she called a pro. He came out, spent an hour "doing stuff." Made a small adjustment. Said "If this doesn't work, you need an entirely new system." Charged her $100.
Did not work. She called her handyman over. Nothing. Her brother, who is a degreed mechanical engineer and a home inspector (yes, I know). Nothing.
I asked to LOOK at her circuit board. 20 seconds after I looked at her circuit board, I pointed to something and asked "what do you see?" she said "it looks like something exploded." Yup. Now, I paid someone to find such an explosion once (different piece), replace a board once more, and have done it (on a new system) myself once, so it was cheating a bit.
BUT. He SHOULD HAVE SAID "Lady, I don't know what's wrong. But the next thing we should do is replace the circuit board. (Good lord! Freon, mechanical fit, wires, relays, and a circuit board. Eh?) No guarantees, though. . ." :fft: