WATER TEMPERATURE CONTROL

Cold water is supplied via the dispenser when the prewash valve opens. If COLD WASH / COLD RINSE is selected, the heater is not activated. If another WASH / RINSE temperature is selected, the heater still is not activated during the PREWASH unless the water temperature is lower than 85° F (29° C).

At the beginning of the prewash cycle, COLD water is supplied via the dispenser when the prewash valve opens. Then HOT or COLD water is applied as required to create a wash of the programmed temperature, as shown in the table below.

As used in the chart, the set point is the specified temperature setting (hot, warm, and cold) as recommend by clothing manufacturers. In times past, HOT was whatever came out of the hot water faucet, COLD was whatever came out of the cold water faucet, and WARM was what happened with both valves opened. The washing machine uses a thermistor and computer to regulate the water input, adding hot or cold water as needed to adjust the temperature. If the washer cannot achieve the desired temperature with the addition of hot water to the tub, the heater will be activated and continue to operate until the desired temperature is achieved. When the desired setting is reached, the heater is turned off, and it will not come on again unless the temperature of the water in the tub decreases by 36°F (20° C.)

For example, in the case of a HOT wash, the water is heated to 122°F (50° C.)

In example 1, on the next page, HOT / COLD temperatures are chosen for a NORMAL cycle. The prewash valve is opened and cold water is supplied briefly, then the hot valve is opened and water fills the tub until it reaches 131° F. As 131°F is hotter than the set point for HOT washing (122° F), the cold valve is opened to regulate the temperature to 122° F and the heater is never energized because the water temperature meets the target.

A		Prewash valve opens, cold water is supplied.
B, D, and F	Hot valve opens to raise the water temperature to 131° F. 
C, E, and G	Cold valve opens to lower the water temperature to 122° F.
H		No water is supplied because the water level reaches the target.

In example 2, HOT / COLD temperatures are chosen for a NORMAL cycle. The prewash valve is opened and cold water is supplied briefly, then the hot valve is opened and water fills the tub to the target water level. This water never reaches the set point, so the heater is energized. When the water temperature reaches 122° F, the heater is turned off.

A	Prewash valve opens, cold water is supplied.
B	Hot valve opens to raise the water temperature to 122° F. 
C	No cold water is supplied because it has already reached the target level.
D 	Heater is not turned on because the target temperature of 122° F is reached.

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