Model # ATF6000FS1
, the complaint on this washer was it would continuously fill for several minutes, then it would display an E10 error message and begin to pump out the excessive amount of water. Overfilling conditions are usually the result of a problem with the pressure switch so that is where I began my checks.How Pressure Switches Work
The pressure switch is the component most washers use to determine the amount of water inside the wash tub. To do this, the pressure switch is connected to a hose which will connect to an air gap mounted to the bottom side of the wash tub. As the water level increases, the pressure inside the tube increases which then presses against a bellows located inside the pressure switch. The bellows is then attached to a set of switch contacts that will close when the preset pressure has been met. If you remove the pressure hose and blow into the switch, you will hear the contacts close and should measure continuity through the the switch terminals. Some washers utilize a pressure switch with multiple or infinite water settings. These switches operate the same way, but the amount of pressure required to close the switch can be adjusted by turning a selection know. That way if you want a higher water level, more pressure will be required to close the switch.The Pressure Switch in this Washer
The pressure switch on this washer works much like the above description, but it utilizes a solid state or digital pressure switch which has no internal switch contacts but instead uses a crystal that will change resistance as pressure is applied to it (just like a digital scale). These switches will have three wires leading to them (5vdc, 0vdc, and a signal line reading between 0~5vdc) and need to have voltage applied in order to test their operation. A word of caution, the connector to the Frigidaire pressure switch can go on two ways, wires pointing down is correct, wires pointing up will result in you getting a new switch.Back to the Repair
Because this unit also displayed an E10 error code (E10 really doesn't exist in the error list, but it will display E10 and then log and E11) which indicates a long fill, I used my meter to check the connector at the pressure switch and found my 5vdc, but nothing from the signal line indicating this switch has failed. After I installed a new pressure switch this washer was again filling to it's proper water level.
FRIGIDAIRE Switch - Pressure, part number: AP4298882