Which is not what capacitors are supposed to do at all. Run capacitor have to take continuous operation. This part is leaking electricity like a sieve. Exploding electrolytic capacitors contain corrosive liquids, the fumes are corrosive and unhealthy as well. Phil : A voltage loss of 34% is terrible! Since posting was able to get the test value for the Electric motor shops should have the necessary part or parts. It is connected all the time. Those businesses that sell and install wells will know and so will the pump shops. After the blown start capacitor the 1st thing done was to check the resistance of the motor windings which were OK. Also checked the relay and it was OK. The function is to provide a phasing delta between excitation winding. But that is not the worst of it. The control box is a "town and country". Capacitors *do* wear out and blowing up is actually one of the failure mechanisms, so there may very well be nothing 'wrong'. I had been away from my home, and when I returned I had no water pressure. Re: Well pump control capacitor blew up; Author: Wheelchair (IL) Much depends on where you live and what is available in your area and how far you wish to travel. To begin with it is a 2,200μF capacitor so 943μF is not even close to its marked capacity. Also, in general, if something explodes / catches fire / etc., unless you have a really good idea of what caused it, a good rule of thumb is to try to learn a bit more about what happened before trying a … Replace the capacitor with an identical model and if the next one blows out within a few days, then your problem is the starting torque requirement. Well, you may ask, Why is any of this so bad? Specifics This submersible well pump is a RedJacket 1/3 hp 230V single phase 3 wire Model 33 M1. ... Hello again, it sounds like the pump start capacitor situation might be resolved. I found the well breaker tripped. Best way I can describe it in not so technical terms is it is like holding a carrot on a stick in front of a horse while riding the horse. Major problems with well pump ... so when i inspected the cap i found it was blown. The capacitor for my well pump blew a few days ago. but we should still check the amperage on all 3 legs against the pump motor full load amp rating. I investigated the pressure switch, and the control box, and that is when I found pieces of the capacitor inside the box. Re: Capacitors for well pumps That is a run capacitor. I flipped it, and found the well did not pump.