New to the forum and full of questions.
I have a 10 year old system in a 2000 SFT dbl wide home, well insulated, 2x6 walls, good windows. Etc.
The outside unit is a Goodman 4 ton unit with a Copeland Compressor, the indor unit is an Intertherm heat strip unit with a 4 ton coil exposed in no case.
6 years ago the compressor actually exploded, the side of the compressor where the wiring enters popped and the compressor was toast. I hired a trusted HVAC installer I have know for years to come out and replace the compressor which was under warranty. He said the compressor suffered from a defect as they normally do not fail in that manner.
All has been pretty much well since then, I do regular maint on the unit, purchasing good filters, keeping the coild clean etc.
Yesterday the condensor fan "GE 1/4hp" siezed and had to be replaced, I removed the cover and the motor and had the unit ready for the repair tech when he got here. He mounted the new motor and fan, and his knee I guess smashed the side of the condensor coils bending some of the fins. When he started the unit up, inside I could here the unit surging, sounded like water being forced through a tube. The high side was too hot to touch the suction side was cold.
I called the tech back from his truck and notified him the high side was red hot, he grabbed his gauges and hooked em up after shutting off the outside unit. Once he turned the unit back on I watched the guages and the outermost ring read 300psi on the high side and about 90 on the low side. He started releasing some freon and asked for a water hose to wash the coil ouside. The pressure went down to about 250-275 once the water was applied. The inside coil stopped making the surging noise.
He claimed at that point that the outside coil was dirty and that it needed to be replaced, cleaning it was not an option. When you hold your hand above the fan outside it feels like it is not moving enough air, and I commeneted on this to him, he disasembled the top and moved the position of the fan blades. Then he added freon back to the system "R22" and the last time I looked at the gauges it was around 300 on the high side and 90 on the low.
The outside air temp was 90 with 70% humidity. The inside temp was 88 with a humidity of 55%. The unit ran from 5:00pm until 4:00am and brought the temp down to 76. Which is where I keep it.
We live in South Texas so summers are usually brutal, not this year, we havent had a single day over 95.
My question is, the surging at the orrifice tube, is this normal, are the pressure normal. And would I be wise to install a TSV? Hope that is the correct name, in place of the orrifice tube. Also, cant this coil be cleaned? I can see through it, and water flows unrestricted through the unit.
Also could there be an issue with moisture and or air in the refridg lines?
Your help and opinions are greatl appreciated.