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16008333
© 1996 Maytag Corporation
TEMPERATURE CONTROL BOARD
Model: PAV5000
The temperature control board receives information from
the water temperature switch about the user’s water
selections. The thermistor located in the water valve,
provides inputs to the board, as it detects the incoming
water temperature. This information combined with the
selections on the temperature control switch determine
the output signals to the water valve. The target cold
temperature is 75° F, ± 5° F. The target warm temperature
is 95° F, ± 5° F. The temperature control system is
intended to warm wash fills when necessary to the target
temperature. It will not cool a fill when the inlet temerature
exceeds the minimum target temperature.
The analog board monitors the water temperature and will
turn the valves ON and OFF to maintain proper water
temperature. When the water temperature is set on
WARM, both valves are on. The longer the valve is ON,
the lower the water temperature will drop in the water
lines. As the temperature drops the automatic tempera-
ture control will cycle the water valve to maintain the
proper water temperature. Rinse fills are not temperature
controlled unless warm rinse is selected.
Analog Automatic Temperature Control (ATC) Table
The analog automatic temperature control (ATC) table
depicts the philosophy of how the automatic temperature
control board operates. The thermistor temp represents
the temperature sensed by the thermistor in the water
valve. The outputs are indicative of the board sending
voltage to the water valve solenoids.
Note: With the temperature control selector in the
ON position.The only combinations where
the temperature control board is active
(BOLD) are warm and cold.
When cold is selected and the temperature sensed by
the thermistor is too low at the valve, the hot valve will be
activated.
When warm is selected and the temperature sensed by
the thermistor is too cool, the cold valve will be shut off.
Water Temp
Selections
ATC Selector Thermistor
Temp
Hot Valve
Output
Cold Valve
Output
Hot Off Low On Off
Warm Off Low On On
Cold Off Low Off On
Hot Off High On Off
Warm Off High On On
Cold Off High Off On
Hot On Low On Off
Warm On Low On
Off
Cold On Low
On
On
Hot On High On Off
Warm On High On On
Cold On High Off On
16023083
SECTION 9. TROUBLESHOOTING 9-10