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Message
AC keeps cutting out. ETA Seems to work fine at night when outside temp drops
Posted on 6/25/23 at 4:24 pm
Posted on 6/25/23 at 4:24 pm
I don’t know why. Auxiliary drain pan is empty but it will cut off before hitting set point. Set point is 70 and will shutoff at 73. I know we had some electrical surge issues in the neighborhood but I would think any issue from that would mean the unit wouldn’t work at all.
ETA: it gets even weirder because when it cools off outside at night it will then work fine and get the house all the way down to 69
ETA: it gets even weirder because when it cools off outside at night it will then work fine and get the house all the way down to 69
This post was edited on 6/26/23 at 7:46 am
5
Posted on 6/25/23 at 4:34 pm to thadcastle
Have you checked the float switch itself?
Posted on 6/25/23 at 4:41 pm to thadcastle
I suspect the thermostat.
Posted on 6/25/23 at 5:48 pm to thadcastle
I’d say it sounds like thermostat. Especially if it’s cutting off @ 73° each time.
Posted on 6/25/23 at 5:50 pm to Contender54
quote:
Have you checked the float switch itself?
It wouldn’t come on at all if the float switch was triggered.
Posted on 6/25/23 at 6:00 pm to thadcastle
If you set it to 67 will it shut off at 70?
Posted on 6/25/23 at 6:12 pm to weadjust
quote:
If you set it to 67 will it shut off at 70?
No I’m starting to think it’s a low pressure sensor in the refrigerant system that is causing it to cutoff
Posted on 6/25/23 at 7:17 pm to thadcastle
my son's ac was short cycling and it was a partial clogged drain line. Once enough water drained it would come back on, but quickly filled up and activated float and cut back off.
Posted on 6/25/23 at 7:18 pm to thadcastle
Could be a number of things
This post was edited on 6/25/23 at 7:20 pm
Posted on 6/25/23 at 7:23 pm to MikeBRLA
quote:
It wouldn’t come on at all if the float switch was triggered.
Depends on how the float switch is wired. With mine, all it does is cut off the compressor output. As soon as the float switch is proven again, the compressor kicks back on (auto-reset). The fan continues to run all the time if there is a Y1 call.
Posted on 6/25/23 at 8:39 pm to UPGDude
quote:
Depends on how the float switch is wired. With mine, all it does is cut off the compressor output. As soon as the float switch is proven again, the compressor kicks back on (auto-reset). The fan continues to run all the time if there is a Y1 call.
That’s exactly what I meant. The system wouldnt cool at all if the float switch was triggered. That’s NOT the symptom that the OP is experiencing , thus it’s not his issue.
Posted on 6/26/23 at 1:07 pm to thadcastle
I’d bet high head pressure cut out/ over heating condenser. Are the condenser and evaporator coils clean / replaced filter. Is the condenser fan running the whole time the compressor is on? A flaky cap can allow it to start the fan but drop out or make fan motor run hot and trip the overheat on the fan motor, leading to the compressor cutting out with high head pressure or overheat.
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