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re: Calling AC experts of the OT. AC hits setpoint, warms back to 80+, rinse and repeat
Posted on 7/19/20 at 10:10 am to dualed
Posted on 7/19/20 at 10:10 am to dualed
Hopefully it’s something as simple as a thermostat, they can go bad, but could also be a air flow issue associated with the indoor blower, in the air handler, issue - working, but intermittently, or a faulty relay/control board controlling the indoor blower motor. You just need an experienced tech with a diagnostic mentality to go over if it’s not the thermostat. Motors (compressor or blower motors) may go into thermal overload and shut down and then start working again when they cool.
The tech who checked your refrigerant charge and cleaned your outdoor coil, did he leave you a service sheet that had the refrigerant pressures on it and subcool (SC) and superheat (SH) numbers on it? If so can you post them?
A HVAC in the Deep South has an average life expectancy of 13 to 15 years so hopefully the fix is simple and you have some additional years remaining on the unit but it’s now a good time to be planning/saving for a replacement unit.
The tech who checked your refrigerant charge and cleaned your outdoor coil, did he leave you a service sheet that had the refrigerant pressures on it and subcool (SC) and superheat (SH) numbers on it? If so can you post them?
A HVAC in the Deep South has an average life expectancy of 13 to 15 years so hopefully the fix is simple and you have some additional years remaining on the unit but it’s now a good time to be planning/saving for a replacement unit.
This post was edited on 7/19/20 at 10:58 am
1
Posted on 7/19/20 at 11:40 am to CrawDude
Is your blower on the inside cutting out? My sister had one do the same thing yours is doing and it ended up being the blower motor was going bad and tripping it’s thermal cutoff. It would then cool down and start back up for a while before doing the same thing.
That being said, any decent HVAC tech should be able to watch the pressures, SC and SH, plus amp load on the compressor to figure out if the above or any of the other suggestions so far are the culprit. I think you need a different tech.
That being said, any decent HVAC tech should be able to watch the pressures, SC and SH, plus amp load on the compressor to figure out if the above or any of the other suggestions so far are the culprit. I think you need a different tech.
Posted on 7/19/20 at 1:04 pm to dualed
UPDATE:
Not the thermostat. Got my guy back out and he’s saying it’s the compressor. Something to do with the expansion valves and some other issues. With my unit being old as shite, I’m just ponying up the money and getting him to replace the whole thing. Just gonna run me 2500 with the little for labor he’s charging me for. Thanks for the input everyone!
Not the thermostat. Got my guy back out and he’s saying it’s the compressor. Something to do with the expansion valves and some other issues. With my unit being old as shite, I’m just ponying up the money and getting him to replace the whole thing. Just gonna run me 2500 with the little for labor he’s charging me for. Thanks for the input everyone!
Posted on 7/19/20 at 8:16 pm to dualed
If you have a digital thermostat replace the batteries
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