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Problem for Hobart AM14-253 Free-standing Dishwasher
Hobart AM-14 water temperature not maintained
By lshipman01 on Oct 01, 2009
Helping a business owner with a Hobart AM-14 dishwasher with electric heat but without a booster heater. With normal water level but between wash cycles (dishwasher idle), should the water temperature be automatically maintained? The heater contactor is energized only during the (short) wash cycle, but is deenergized at other times. This allows the water temperature to become too low to be effective. Thanks.....Lee
Solution #1
posted on Oct 04, 2009
The AM14 when filled, will control the wash heat on the thermostat and high limit controls, putting power to the wash heat contactor. I believe it is 2CON. This circuit is not timer cycle dependant.
There are two types of control board form the AM14. The older has a black metal heat sink in the center, You set the wash set point by holding the wash heat button on the board. This will cause the display to flash with the set point. Turn the trim pot on the board, near the top to adjust.
There are a variety of versions for control voltages. Most are 24v ac. Check your schematic inside the control box, or look at the spec of 2CON for the coil voltage. Put a meter on 2CON coil to monitor the control. If power remains on the coil but the contactor drops out, you have a coil that is opening with heat. If the power drops prior to set point, trace the loss of power through the controls.
There are two types of control board form the AM14. The older has a black metal heat sink in the center, You set the wash set point by holding the wash heat button on the board. This will cause the display to flash with the set point. Turn the trim pot on the board, near the top to adjust.
There are a variety of versions for control voltages. Most are 24v ac. Check your schematic inside the control box, or look at the spec of 2CON for the coil voltage. Put a meter on 2CON coil to monitor the control. If power remains on the coil but the contactor drops out, you have a coil that is opening with heat. If the power drops prior to set point, trace the loss of power through the controls.
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