This capacitor keeps blowing up regularly. I turn off the switch and a few seconds later hear a "contact like noise"(like relay contacts either making or breaking). I disconnected all the high-power components (transformer, magnetron, and capacitor), but it keeps blowing the fuse. I ran it with it opened and it was shooting smoke and some oil out the top edge of the cap. ••• More options. Step 1 - Test Plug With Multimeter. The start capacitor would normally be energized only a few seconds. Next Last. The deluxe box has external overloads you can manually reset. Buying a New HVAC Capacitor A new Capacitor should always be installed with a new motor. My AC keeps blowing the run motor capacitor. This is the switch opening the aux winding circuit with the start capacitor. Jul 23, 2014 #6 Can you post a picture of the parts in question? I found the well breaker tripped. A start capacitor can be damaged by a sticking relay, which will cause it to stay in the circuit longer than normal and overheat. Joined Jul 17, 2008 Messages 2 Location Modesto, CA. Single phase motor blowing run capacitor. The PTC, or positive temperature coefficient, is another part of the start up relay system. The run capacitor of the refrigerator is an important component in its start up relay. I don't know if you would be better to replace the capacitor and square thing, or to just get a new control box. Installed new capacitor, new motor, new timer. i replaced the burnt capacitor with same microfarad rating, and it blew up again, replaced it with a higher reting microfarad capacitor, still the same thing happened. In the past month we have had 3 separate incidents that left us sweating. Once you have access to the electrical items inside your pressure washer, you can start to look at the following parts. Capacitors blowing by: Andy . I want to replace the box, and hope that fixes my problem. Once the motor is started the start-cap can be disengaged. Joined May 16, 2013 Messages 9. All capacitors have a maximum voltage and their destruction depends upon the internal construction. Registered. and replacement start capacitor have used this sequence. Likes: 0. I checked the capacitance with my Fluke meter and the capacitor went bad . S. snowluck2345 Registered. I get water but it will blow the capacitor anytime I need to do something that requires allot of water, like laundry. Specifics This submersible well pump is a RedJacket 1/3 hp 230V single phase 3 wire Model 33 M1.