Close the wash tank drain valve.
Turn on the hot-water and cold-water valves fully.
Check that the tank fills to overflowing in approximately 90 to 100
If the temperature continues to fluctuate, replace the thermostat switch.
c. Calibrate the Mixing Valve.
(1) Adjust the temperature. If the water temperature is too hot or cold you
must adjust the temperature.
(a) Turn the mixing valve handle screw to the hot position.
(b) Loosen the handle screw and remove the handle.
(c) Turn the adjusting screw clockwise to reduce outlet temperature or
counterclockwise to increase the outlet temperature. Refer to figure 3-2.
DO NOT turn the screw more than 1/2 turn at a time.
Figure 3-2. Valve adjusting screw.