My thermostat plays Jazz and I don't know what to think about that.

Excellent! I bet it sounds quiet warm now that your AC is fudged. Try some vibration control under the heat pump and let us know if you hear any improvement. 

Nest - just hook up the yellow wire for cooling season and unhook it for heating. Somebody saw you coming.

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@fuzztone - Actually was the O wire. It wouldn’t stay on for more than 30 minutes at a time. 

An in wall subwoofer should be your next upgrade;-)

Is the AC front or back ported?

@erik_squires So sad.

You and I both know you had the ability to troubleshoot that yourself and I'm sure next time you'll be slower to call the repairman.  

Jerry

@carlsbad2 - Thank you for the vote of confidence, but when I moved in here I had no idea what I was looking at. I could now!! The last two years were a very expensive learning experience for me. This is my first home and the first time learning about how heat pumps work, so I was happy to leave it to the experts.

Now, if I had had a bad breaker, light switch or other such thing I’d be the one fixing it, if not causing it!  To confound the issue, it happened when the sun was hitting the roof the hardest, so everyone thought it was the heat pump or air handler getting overworked.  It was instead just the thermostat getting tired of holding the O wire up.

One thing I learned, that I can actually make an analog for in the audio world is the value of measurements to fix problems. Having a temp/humidity monitor that logged the data and let me easily send the charts to my techs is what convinced the techs that I had a real problem to begin with and it led us to understanding how the system behaved when they weren’t here. They’re super cheap too, like $20 or something.

This is what we call in IT a Dancing Frog from the WB cartoon. A problem that only showed up when no one else was looking at it.

One of the techs made the point, correctly, that part of the issues today is so many of us work from home, and we may never have even known these problems existed.

Cool jazz?

First home and heat pump?

Apologies.

It sounds like you determined the in incompatibilities of the Nest for your system. Sorry it was so costly.

Yes, first time with a mortgage instead of renting and first time being a dad two two heat pumps. 

Erik,

A Scotsman in a kilt stepped over a man's head while he was lying down and looking up. The man on the floor sat up and said to the Scotsman, "I always thought you were crazy, now I see your nuts!"

Erick you obviously got the deluxe model just replaced the HVAC here for $7K with a smart thermostat but no Alexa and no tunes. My poor tube amps will have to suffice. 😉