A/C goes on and off

[alan1]

An interesting thing is going on. When I turn on one of my A/C units, it runs for a while then shuts down, the fan stays on only the compressor stops. This happens, even though it has not brought the temperature down to the set point. After a minute the compressor starts up again. After 15 or 20 minutes the cycle starts again. The unit puts out cold air when running. I am thinking capacitor or freezing up. Any ideas?

[GUS2000]

Could be the freeze sensor thats either gone bad or it is actually freezing up..

[OMMM4747]

How old is the unit? Have you ever cleaned the coils? The capacitor wont freeze, but the coils may if they're dirty and not getting good airflow which may be the reason for the short cycles.

I would not suspect freezing if it starts acting up right away, but if the unit is running for a while before it starts acting up, then possibly freezing. If not freezing the only other thing you can do is replace the capacitor. If you go that route, be careful. The bad capacitor still has and will hold a charge even with all power removed from the rig.

HVAC Segment @ 6:45. I prefer the green can (Nu-Calgon). It doesn't foam up as much and allows me to better aim the stream between the fins. The blue cans create a lot of foam on contact. The green cans also appear to clean better.

https://www.youtube.com/watch?v=FOiS...TodayisSomeday

Good luck

[YC1]

Are you on 30 amp shoreline?

[alan1]

Thanks guys, kinda what I was thinking. Always nice to have agreement before I clime on the roof. I will do the capacitor first as I have a spare one.
Again thanks.