A few years ago, the motor capacitor from my pressure washer exploded, it was a large 50uF non-polarized, plastic-cased run capacitor for a 230V, 2750W motor. Interestingly, it didn't stop the motor right away but it couldn't restart when shut down.
Its case read ILCEA K 45 5000 50uF +/- 5%b 450V HPFPU.
Because the device was over ten years old, I didn't bother to repair it but kept it anyway, until a few months ago when someone gave me four large alumin(i)um-cased caps: 13uF 13uF 14uF and 10uF (non polarized,450V max or so, all from Bosch).
So I decided to wire them in parallel in place of the old one, and it worked as before even under maximum load.
After 10 minutes of use, I stopped the motor to make sure the capacitors were not overheating and found that the two 13uF caps were hotter than the others (still able to touch them with my bare hand, but the two others were still at room temperature).
Does it mean that only those two actually work, do you think it's safe to continue operating the device, or will they keep heating up until they meet their fate too?