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re: Replacing AC capacitor.
Posted on 6/14/24 at 12:50 pm to OysterPoBoy
Posted on 6/14/24 at 12:50 pm to OysterPoBoy
Some AC units have a protective mode that won't allow a capacitor to start again after a power cycle.
Usually will stay off for about 30 minutes IIRC
Usually will stay off for about 30 minutes IIRC
This post was edited on 6/14/24 at 12:50 pm
0
Posted on 6/15/24 at 10:25 am to tigerfoot
quote:aannnddddd like clockwork. My rear unit stopped cooling correctly at 7pm Friday. Four hours late.
AC guy out there to check for leaks or such in the coil before it is an emergency on a Friday at 3.
God I HATE these units in this house. I think I’m replacing this system. But the new coil, the second one in three years, is under warranty. And I am cheap. But I also like a cool house.
Posted on 6/15/24 at 12:49 pm to WigSplitta22
quote:
Was all that bs really necessary?
I learned from it.
Posted on 6/15/24 at 1:26 pm to tigerfoot
Change the capacitor.
Posted on 6/15/24 at 1:32 pm to OysterPoBoy
what a timely thread. ac quit cooling yesterday evening. outside fan isn't spinning. manually got it spinning and I noticed the lights in the house flickering every few minutes.
Assuming it's the capacitor causing small surges. Ordered a new one which will be here tomorrow. Fingers crossed that the capacitor is the issue.
Assuming it's the capacitor causing small surges. Ordered a new one which will be here tomorrow. Fingers crossed that the capacitor is the issue.
Posted on 6/16/24 at 6:29 pm to OysterPoBoy
You can test the capacitance of the capacitor with a $20 volt meter to verify whether your capacitor is good or bad.
On mine, after confirming a good capacitor, I went to verify 240 volts incoming (good) and then went to verify 24 volts at the contactor (the low voltage from the thermostat that tells the contactor to switch the outside unit on). Touching the probes to those connections jiggled the contactor and caused it to make contact and told me the contactor was loose (and also showing signs of scorching when I removed the cover). Swapped out the contactor for a $15 Amazon replacement, back up and running.
If you do this and find that you don’t have 24 volts at the contactor, then you get to follow that circuit back through the float switches and other safety switches that may indicate you have a stopped drain and the float switch is keeping the ac from turning on.
Voltmeters are invaluable for diagnosing and working with electrical issues.
On mine, after confirming a good capacitor, I went to verify 240 volts incoming (good) and then went to verify 24 volts at the contactor (the low voltage from the thermostat that tells the contactor to switch the outside unit on). Touching the probes to those connections jiggled the contactor and caused it to make contact and told me the contactor was loose (and also showing signs of scorching when I removed the cover). Swapped out the contactor for a $15 Amazon replacement, back up and running.
If you do this and find that you don’t have 24 volts at the contactor, then you get to follow that circuit back through the float switches and other safety switches that may indicate you have a stopped drain and the float switch is keeping the ac from turning on.
Voltmeters are invaluable for diagnosing and working with electrical issues.
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