This washer uses a centrifugal pump which is supplied with 220VAC through a relay. If you hit the "Drain" function with water in the machine (door closed), then you should hear a small click (pump motor relay closing) and the pump motor should immediately run. If it doesn't run, but you hear a faint hum after the click, then the motor is getting power but is not spinning.
If the motor's running but not draining enough, check:
1. Outlet hose no more than 36 inches (0.95m) above floor. Lower gives better draining.
2. Check pump for foreign material and clean as required.
3. Check hoses for foreign material, restrictions, pinching, etc.
If the motor's NOT running but IS getting power (hums):
1. Check pump for foreign material, including behind impeller.
2. If this doesn't fix it, replace the pump.
If the motor's NOT getting power:
DANGER: 220VAC and Water are DEADLY! Don't go further unless you know what you're doing (high voltage electricity and electronics service) ESD (Electrostatic discharge) protection procedures must also be used to brevent electronics damage.
1. Disconnect motor connector, check for 220VAC when the pump should run. Trace back to control board and locate the relay. If relay is closing, look for 220VAC on its input (NOT its coil!); if present, replace relay.
2. If 220VAC is not present at relay input, find out where you're losing it and repair the connections, etc. If the relay isn't closing, look at the coil voltage to see if its the relay or control circuit which isn't working.
3. If you're this far with no fix, replacing boards may mwke sense unless you're a skilled electronics tech--and may still be the only option even then, depending on manufacturer support.
Notes:
1. The pump motor is a PM motor with an AC drive coil, and a 1/4 turn free play in the PM rotor to guarantee successful starting. It uses a stainless steel shaft riding in plastic sleeve bearings. Excessive run time or foreign material in the pump will cause premature bearing wear, which requires pump replacement. This happened to my washer and I had to replace the pump.
2. Run about 1 quart of vinegar in a hot wash, say 70 C or 170 F (no clothes or soap) to clean the machine out.
Mayfair, October 2007
