Hi all, So my wife calls me while I’m at work to tell me that the air con has shut down and the thermostat screen has powered off. Which is perfect since we live in South Florida and my mother-in-law is visiting from out of state. So I head home. I trace the issue to a failed 220-24VAC 40VA control transformer which I replace. My wife is all proud of me as the thermostat lights up and starts to boot. But then it powers off and the control transformer starts to smoke. It’s now 8:30pm and I can’t buy a new control transformer without paying a $100 surcharge. I ended up going to Home Depot and buying a 120-24VAC 20VA doorbell transformer. I then went through the system and attempted to locate the fault that was causing the transformer to burn out. I tested all the control wiring, ohming out each wire to the others and to ground and found all the wires to be in good condition. I ohmed the compressor contactor and got 20 ohms. Then I hooked the doorbell transformer up to each individual portion of the circuit along with an amp probe. I tested the compressor contactor, that was good. I tested the fan relay next, and that was good. Finally, I tested the thermostat and that appeared to be good. All I’m after is air conditioning so I left off the heater control wire and anything that was connected to the heater I disconnected. I turned on the unit and everything has been great ever since. But nothing has been fixed because I know that if I reconnect the heater side I’m going to fry that control transformer. So my question is: where is the fault? Is it in the thermostat or in the heater? Evaporator: RBHC-21J11SFG with electric heat Condenser: RAMC-042JAZ Thermostat: First Alert TERM-500 Thanks in advance, Ozzie

Once it gets in the 90s it’s typical for my heat pump to run all day to cool the house. Seems to “struggle” as compared to new. It’s a completely new Lennox system installed in 2015. Are these air bubbles normal (95F out today)? I feel I’m seeing them more often than I used to. Once the warm weather hit this year my AC had trouble kicking on for an entire day that I was at work. I flipped it to heat to get the heat pump going then I turned it back to AC and it began working. Instant read infrared thermometer says 10F spread between intake and vent but if I hold the “instant” read on there it widens up to about 14-15F spread. Heres the video of the air bubbles. I’m located in Missouri [url]https://youtu.be/YfhroRRiPhk[/url]