Replacement options for paragon 8145-20

[Magoo]

Get a paragon with a pressure reset, not totally time driven defrost controller.

[jgroberson]

Don't forget that many mfgs refer to a defrost period as an oil return period
and the 8145-20 has a termination solenoid that can be wired to a temp or pressure control if it's not being used, You can buy a clock with pressure termination but they are about 3 times higher than an 8145-20

Excessive run time may be an indication of box insulation failure especially when you have an ice operation with possibilities your thawed product is getting into the cooler insulation. I have seen many walk ins torn down that had so much water in them they couldn't be carried by human means and I have added foam to the outside on many boxes to bring down excessive heat gain until replacement could be done.

I had a walk in on R-12 that ran 24hr at +15f. Did a core sample on the panels and she was full of ice. Added 4 inches of foam to the outside and the next service call complaint was "You next to fix that damned freezer because it's -40f in there and my shoes stuck to the floor and so did my bare feet when I walked out of one shoe" The thermostat had been turned all the way down previous and not reset. Long runs and big power bills are not always caused by the compressor and can not be corrected with different controls. Frost on the inside of a ceiling or wall panels is your first indication of water inside and the old fiberglass seems the worst. If so
get out your hole saw and attempt a core sample and I say attempt because if it's solid ice you can't drill through it on a freezer and a cooler wall will be full of water
that runs out on the floor around the failed panels

Good Luck to you and thanks for letting me share with you