Regardless of the brand or design of water level switch used on Whirlpool, Maytag, Kenmore, GE, Frigidaire washers, it’s main function is to manage the amount of water that enters the tub. The moment the correct water level is reached in the washer, the switch completes a routine to the timer motor, machine motor and agitator control.
Through the fill percentage of the washing machine cycle, a routine is completed through the pressure switch contacts to either one or both of the water control valves on the water inlet, permitting water to enter the washing machine.. because the timer motor does not operate before proper water level is reached, not operating time is lost through the fill process.
Earlier models of washers used a float-type switch to manage water level in the washer. Because they are now obsolete we’ll keep our discussion to the pressure-type of water level switches. Modern washers now use a pressure-type switch علت بیرون زدن کف از ماشین لباسشویی. A hose is connected to an air bell on the underside of the outer tub. It then connects to the pressure switch – which is usually mounted behind the control panel. Whilst the washer is filled with water, an air pocket is formed in the plastic hose. Whilst the water rises in the tub, the air pressure in the tube increases until it’s sufficient to cause the diaphragm in the pressure switch to actuate the switch contacts; thus, opening the circuit to the water control solenoid, or valve, and stopping the flow of water in to the washer. Whilst the water drains out from the tub the air pressure in the hose gradually decreases allowing the pressure switch diaphragm to reset the switch contacts. When these washer pressure hoses split or rupture within a fill cycle your washing machine may overflow water on to the ground and cause unwanted damage.
One reason for overflow that I’ve seen on numerous occasions is a stress hose clog. Remember, the pressure switch receives air pressure that is generated from the basket water that exerts it’s pressure to the air bell in the outer basket housing. This air pressure is sent to the pressure switch in top of the control panel with a pressure tube, which sometimes gets clogged with undissolved laundry detergent. An easy way to avoid this is to run the laundry cycle in the warm/warm or hot/warm water temperature setting. This will make certain that the detergent properly dissolves and is not deposited in the air-dome or pressure tubing.