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Hobart UW50/ aka dinosaur…Boosters not heating
Our 20+years old UW50 High Temp dishwasher is working fine except for the boosters not heating the rinse water up to temperature. We have the old construction model, i think. In the ‘Catalogue of Replacement parts’ it says (before S/N 851081922) The model with two stainless booster tanks each with a 7000w heater element.
I tested the heating elements and they’re not getting power. In the booster control box the contactor is getting proper voltage but not pulling in, I tested the contactor with the unit de-energized and the contactor seems to be in fine condition.
I believe that there are two circuit boards (one in booster control box and one in the other control box) with a red light labeled ‘heat’ that goes on when the boosters are being energized. Those lights are on yet the boosters still have no power. At one point the light went off when I was looking at it, I adjusted the plastic screw on the board used to set the temperature, the red light came back on and still no power to the boosters.
Anything else I can check? High Limit Protector?
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