I wonder if its inrush related, because they are switching on/off every day?
Anyway, we had a run cap on our compressor on our thermal chamber constantly blowing.
But yes, if you can get to it yourself, i would just put something in there. I would guess that eg Panasonic or Siemens do good ones.
I think these run caps do get big current surges now and again...and since they dont have wet electrolytic, they arent well robust against this. AYK, "wet electrolytic" is the master of handling enormous surge currents.
Maybe your/our electrician accidentally puts starter caps in there....?...these, AYK, arent as durable as the run caps.
What about making up a board of X2 caps in pllel, to get the value...then just wire that in instead?...sounds more durable.
And what about putting a "transient catcher" in there as well as the run cap......just a big bank of electrolytics behind a diode bridge, with a slow discharge resistor...this 'lytic bank will soak up the transient, instead of the run cap...so make it last longer.