Moyer Diebel MH-6LM5 User Manual

BASIC SERVICE

Models MH-60, MH-6N, and MH-6L use a float switch and circuit board 
to control tank fill and tank heat.

For Model MH-60 only, the built-in booster heat circuit is also controlled 
by the float switch.

1. When dishwasher main power switch is turned on (wash tank empty), the

drain valve closes allowing cycle time to run for a minimum of 110 sec-
onds to fill the tank.

2. The float switch ball rises; its normally open contacts close. 

The fill circuit times out; the fill solenoid de-energizes, and 
the tank heat and booster heat energize.

3. If water level drops below the float level, the float switch ball moves down; heat 

de-energizes. The fill solenoid energizes and the fill cycle runs for a minimum of 110
seconds to refill the tank.

4. If the tank is not full of water at the end of the 110-second fill cycle, then the machine

will cycle again. When the float switch is satisfied, the fill cycle stops after completing
its 110-second cycle.

5. Refer to the float switch troubleshooting chart below (Fig. 16) for a quick guide to 

evaluating float switch problems.

System 
Checks

YES

YES

YES

NO

NO

NO

Wash 

Tank Fills Constantly

Is Tank Full

of Water?

Is the Float

Ball Up?

Check

Drain

Clean 

Float
Assy

Is Heat ON

when called 

for?

Replace  

Float

Check

Solenoid

Valve