On Sunday, June 3, 2018 at 5:06:08 PM UTC-5, Scott Frederick wrote:
I have an outside unit AC. Air handler and condenser unit all in one.
I keep on getting an intermittent failure of the compressor to kick on.
I've noticed it for off and on for several weeks.
The house will be warm. Tstat says cooling is on, but temp is 3-5 degrees warmer and just the fan running.
Sometimes it quits at night and then kicks on at mid-morning.
The fan kicks on, but no compressor or condenser fan operation.
Then it works fine for five days.
Then today it never kicked on from about 10am until around 4. It was in the mid to upper 80s outside. Working and cycling perfectly fine right now..
Where should I go from here?
Thanks

Your AC unit could have a capacitor that's going bad or a bad connection. Quite often a 1/4" Faston connection will go bad somewhere in the wiring. Another problem I've found in outdoor units is ants. The contractor(big relay) has power flowing through its coil all the time because of the heat anticipator circuit in the thermostat. This electrical current actually makes the contactor warm. The warmth attracts ants which often decide its a good place for a nest. I've even pulled cockroaches out of the dang contactors before. I'd open the control box on the outdoor package unit and look for bugs, living, dead or electrical. ^_^

[8~{} Uncle Bug-eyed Monster