Question about Hobart AM14-253 Free-standing Dishwasher

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AM14 tank heaters--when are they energized?

The heaters for the tank in the AM14 I'm working on are energized only during the wash cycle (and maybe rinse cycle too--I didn't check). But when the unit is idle (meaning while waiting for another load of dishes), and with normal tank water level, the heaters are off, and come on again only during the wash cycle. Is this normal? If so, I would wonder how effective they would be in heating the water. With such a short wash cycle, the wash water's temperature drops. (PS: checked the heaters & they are all receiving normal power when the contactor is energized.)

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  • Anonymous Mar 02, 2009

    Yup, it's an AM14. The incoming water temperature is low (about 120 deg) & that's why I'm wondering why the heater contactor is only energized during the (relatively short) wash cycle. Between wash sessions the tank is not drained, and I'm told (but have not personally observed) that the temperature stays around 97 degrees.

    During the rinse cycle the display shows what appears to be the correct water temperature (about 135 degrees) so I don't think there's a problem with the display or the rinse thermistor. And the actual tank water temperature seems to be displayed correctly, so I'm ruling out any malfunction in the sensors or display.

    I don't know the history of the previous owner. It's possible that he had a booster heater, so this wasn't a problem. Somehow I'm wondering if the tank heater temperature scheme can be adjusted?


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How hot is the wash temp?It should be 150-165 degrees.The model is an am14 not an am15?I'm hobart tech and repair these units weekly.Let ne know.

Posted on Mar 02, 2009

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Kid 60 s10 please give fault codes

Hi Roger, Hope this helps......CHEERS..


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1 Answer

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When are AM-14 tank heaters energized?

Lee,goto your other post and i posted some solutions.Bigg T

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Feb 17, 2009 | Hobart AM14-253 Free-standing Dishwasher

1 Answer

Hot water blasting out of relief at top right of hot water input

sounds like you have a booster heater. Hatco maybe or one built on the machine next to the pump motor.? the valves on top the chrome one is a vacuum breaker. easy to put 15.00 kit in. the electric one just fills and rinse gauge just tell pressure . Did a valve on the booster heater leak or its tank maybe. The AM14 is very simple crect temp and presure water going in and your in business if the machine is ok. Boosters have a saftey valve that will go pad and they let water out. just like all home water heaters do. they screw into the tank. yours should have a line to the drain. so if it does leak it goes down the drain not on the floor. all the things you describe on the upper right of your sishwasher are just the nopremal fill and rinse. both the crome thing and the electric have kits that can be put in. I would call hobart and say sendf me a itamized estment of repair so you know what your paying for. with part discritions and numbers and prices. Or call me LOL kidding

Aug 05, 2008 | Hobart AM14-253 Free-standing Dishwasher

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