Air Conditioning - AC Unit Has A Mind of It's Own!

Hi! For the last six months, I've noticed a problem with my AC unit [Goodman 10 seer split system heat pump (3 yrs old)] and I'm seeking your experience to better understand what's going on. The outside unit turns on while the inside unit and thermostat/controller are off. In the early spring, when I was outside and the weather was nice, I heard the outside unit going on, and I could not figure out why. I had the thermostat/controller off during this time [this system is for my basement]. Please don't ask, I know for a fact the thermostat was off. In the early spring, it would be the heat that would come on. Now, it is the cooled air. What is happening is that the inside unit does not blow and ice starts to form outside the pipes like a freezer. If the inside blower went on, this cool air would be pushed through the vents; however, it does not, and stays locally within the inside unit. In the early spring, I could smell the heat, but couldn't really feel it blowing out the vents. One other thing to note, the thermostat/controller works fine, when I set a temperture, it will go on and shut off properly. The problem and question to you experts is what is causing the outside unit from going on when the controller is not invoking it?

I had the HVAC guy who installed it come by several weeks ago, and he checked refrigerant levels and indicated that they were fine and noted everything else looked okay as well. I called him on this problem, and we talked about the problem over the phone, but he's apparently "blowing" me off for a lack of a better term. I don't want to beg the guy to come out. Can you educate me here?

THANK YOUUUUUUUUUUUUU

Hi! For the last six months, I've noticed a problem with my AC unit [Goodman 10 seer split system heat pump (3 yrs old)] and I'm seeking your experience to better understand what's going on. The outside unit turns on while the inside unit and thermostat/controller are off. In the early spring, when I was outside and the weather was nice, I heard the outside unit going on, and I could not figure out why. I had the thermostat/controller off during this time [this system is for my basement]. Please don't ask, I know for a fact the thermostat was off. In the early spring, it would be the heat that would come on. Now, it is the cooled air. What is happening is that the inside unit does not blow and ice starts to form outside the pipes like a freezer. If the inside blower went on, this cool air would be pushed through the vents; however, it does not, and stays locally within the inside unit. In the early spring, I could smell the heat, but couldn't really feel it blowing out the vents. One other thing to note, the thermostat/controller works fine, when I set a temperture, it will go on and shut off properly. The problem and question to you experts is what is causing the outside unit from going on when the controller is not invoking it?

I had the HVAC guy who installed it come by several weeks ago, and he checked refrigerant levels and indicated that they were fine and noted everything else looked okay as well. I called him on this problem, and we talked about the problem over the phone, but he's apparently "blowing" me off for a lack of a better term. I don't want to beg the guy to come out. Can you educate me here?

THANK YOUUUUUUUUUUUUU


It sounds like it could be the T-stat is going bad. I once sat on a unit for 5 hours to catch it messing up, only to find the T-stat was bad.

:coffee:

Three possible answers to your problem. One being a bad thermostat (or if battery operated bad batterys) the second possible would be shorted thermostat wires between the system and the thermostat, the third would be a bad circuit board at the air handler. The best way to diagnose would be pull the thermostats from the walls, if the unit cycles then you have removed that as a problem, the next would be to take the low voltage wires that go from the thermostat to the circuit board off the board (provided you have the tech abilities to safely and comfortably do that) if the unit still cycles then it is a circuit board issue.:wall: