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AC Water Pump tripping breaker
Posted: April 16th, 2017, 12:30 am
by cpoint
Here we go new season, new problem

I turned up the seacock on to de-winterize the AC unit. then I went to turn power on and all well. Then I switched the AC water pump and breaker tripped. Did it 2-3 times same. There is quiet a bit of rust, not sure that has anything to do with, maybe loose wiring? It worked flawless last season. So there is power, when I turn AC power on power comes on behind the kitchen table. But trips when I turn the water pump for AC on.. Do I need to replace the whole pump? or the thing hanging from it? see pictures. Thanks guts in advance.
Re: AC Water Pump tripping breaker
Posted: April 16th, 2017, 1:12 am
by g36
That's a capacitor in the box crazy amount of rust the pump is shorted there's probably a leak going on on the pump seal to the motor it would be best to replace the whole pump imo
Re: AC Water Pump tripping breaker
Posted: April 16th, 2017, 5:18 am
by mjk1040
Yep! I think it's toast!
Re: AC Water Pump tripping breaker
Posted: April 16th, 2017, 8:21 am
by waybomb
Capacitor is testable.
Disconnect power.
Take a screwdriver and short between the two connectors.
Now pull the wires off.
Get a an old analog meter like a Simpson..
Set to the middle range of ohns.
While watching the meter, touch both leads to the capacitors posts. Does not matter with which lead to which post. A good cap will show the meter move to the right, then sweep back to the left as it charges.
Now short the leads out again, if that's a good cap it will shock you if you don't short it out.
Note check each post to the case of the cap.
Should not see continuity.
I bet the cap is bad and can be bought at almost any heating and air conditioning shop.
Re: AC Water Pump tripping breaker
Posted: April 16th, 2017, 10:01 am
by g36
Yes the capacitor can be tested but with all that rust there's something going on with pump seals I think it's going to still be a problem wat er and a 120v volt motor wont get along
Re: AC Water Pump tripping breaker
Posted: April 16th, 2017, 3:50 pm
by cpoint
Thanks guys, i agree with you. Was not too expensive. So i ordered new pump. Looks like an easy swap. I'll update you guys nex week after replacing.
Re: AC Water Pump tripping breaker
Posted: April 16th, 2017, 11:02 pm
by RGrew176
My A/C seawater pump died last summer. I ordered a new pump. Mine was a sealed unit most likely easier to replace than try to repair.
Re: AC Water Pump tripping breaker
Posted: April 20th, 2017, 12:49 am
by cpoint
One other question, is this just a connector (Y or T)? I looked online and cant find one exactly like it. Can I use a PVC T connector? I am talking about the T connection that's attached to the white part of the motor with one IN and 2 OUT hoses
Re: AC Water Pump tripping breaker
Posted: April 20th, 2017, 6:07 am
by Midnightsun
Yep, just a T connector to what I must assume is supplying 2 AC units. PVC will work fine as this is what is used in the picture. Personally I would come out of the pump with a single line and then a little farther away use a Y in place of a T as the flow will be less restricted. Something like this comes to mind, just need the correct size and glue in the hose barbs for your application.
https://flexpvc.com/cart/agora.cgi?p=PV ... inc=detail
Re: AC Water Pump tripping breaker
Posted: April 20th, 2017, 6:48 am
by Viper
Why not use the current setup? Did it get damaged?
By the way, did you check to see if that unit is ignition proof?? On a tip from a distributor, I confirmed that not all the models of that type of pump are. Since that tip, I always check now and have found a few installations that were not safe for a gasoline engine compartment. To err on the side of caution, I go with sealed units now. Not only is there no guessing if they're safe, but they're submersible, so if you get water on them for what ever reason like during winterizing a system, you don't have to worry about it.