07610-004-45-09-D
24
FAULT CODES
TROUBLESHOOTING
DISPLAY SHOWS POSSIBLE CAUSES REMEDY
“F1 Service needed,”
“No water in Booster”
1. Low or no water pressure.
2. Faulty inlet valve or ll relay.
3. Contactor to booster heater not turning o.
4. Faulty temperature input (P12) on IO
module.
5. Faulty temperature probe (T3).
6. Faulty oat switch allows heaters to
operate with no water in tub.
1. Verify incoming water pressure is 10 ± 2 PSI.
2. Verify that ll relay is supplying voltage to ll solenoid.
Replace faulty component.
3. Check for welded contacts. Verify that output from IO
module turns o when above the set temperature.
4. Substitute a 1.2 kΩ resistor for T3, and verify that booster
heater turns o. If not, replace IO module.
5. Verify that the booster-probe resistance is correct with
respect to temperature (see table on pg. 24). If not, replace
T3.
6. Replace oat switch.
“F2 Service needed,”
“Check booster
thermostat”
1. Contactor to booster heater not turning o.
2. Faulty temperature input (P12) on IO module.
3. Faulty temperature probe (T3).
1. Check for welded contacts. Verify that output from IO
module turns o when above the set temperature.
2. Substitute a 1.2 kΩ resistor for T3, and verify that booster
heater turns o. If not, replace IO module.
3. Verify that the booster probe resistance is correct with
respect to temperature (see table on pg. 24). If not, replace
T3.
“F3 No water in wash
tank,” “Check inlet
water and door”
1. Malfunction of ll solenoid or ll relay.
2. Door is open, which inhibits ll mode.
3. Faulty door switch.
1. Replace faulty component.
2. Close door to activate door switch.
3. Replace or adjust door switch.
"F4 Service needed,"
"Check incoming
power"
1. Incoming power not properly connected.
2. L3 is missing (3-phase machines only).
1. Check connections to heater.
2. Verify that L3 is present and connected properly.
“F5 Service needed,”
“Check booster
thermostat and high
limit”
1. Faulty temperature input (P12) on IO
module.
2. Faulty temperature probe (T3).
3. Faulty high-limit switch.
4. Faulty booster heater.
5. Booster-heater contactor not energizing.
1. Substitute a 1.8 kΩ resistor for T3, and verify that booster
heater turns on. If not, replace IO module.
2. Verify that T3 resistance is consistent with the table on
pg. 24. If not, replace T3.
3. Replace high-limit switch.
4. Check booster heater for proper resistance. Replace if
incorrect.
5. Verify that drive voltage to contactor coil is present
during a call for heat and that contactor closes. If voltage is
present, replace contactor. If voltage is not present, check
wiring.
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