Frigidaire FDB125RHS0, FDB125, MDB125, F71C12 Service Data Sheet

Exploded View of Wash System

980526 (MECH)

and cause the pump to air lock. The drain
loop on the side of the tub must be kept in
place after servicing.

The main pump can easily be removed by
disconnecting the drain pump connector
hose and the wiring harness connections
made at the circulation motor. Once the
pump assembly is removed from the
dishwasher, the motor/impeller assembly
can be removed from the sump by taking
out the five (5) T-20 Torx head screws from
the plastic motor bracket and then the three
(3) T-20 Torx head screws from the volute
cover. Using a large flat head screwdriver
inserted between the impeller screw and
the sumps volute, the motor/impeller
assembly can be gently pried out of the
sump. Use the screwdriver as a lever.

Pump Assembly

The pump assembly is driven by a

1

/12 HP,
shaded pole motor. Rotation is in the
counterclockwise direction at 3100 to 3200
RPM. The motor drives a pump which
supplies 100 percent filtered water at a rate
to approximately 12 GPM.

Draining is accomplished by using a small
separate synchronous drain pump mounted
to the side of the sump. The drain pump is
connected to the main pump by a small
rubber hose. The drain check valve is
located at the entrance to the drain pump.
The drain hose is attached by a worm gear
clamp to the discharge of the drain pump.
The drain is then routed up the side of the
dishwasher and attached to the side of the
tub. This drain loop insures that an air
pocket cannot form near the drain pump

900 Watt Heater

Refer to the cycle chart on the reverse side
to determine when the heater is on during
the wash cycle.

Voltage checks of the heater should be
made with the timer set in the main wash.

Drain Hose

Heating Element

Filter

Soil Director

Volute Cover

Drain Motor

Connector Hose

Sump

Incoming Water Supply

Impeller Screw

Water Valve

Water Inlet Tube

Impeller

Barrel Rear

Spacer

Barrel Front

Circulation
Motor

Motor
Bracket

Seal

Nut

Lower Spray Arm/Tower Assembly

Tub and Door Seal

The door seal is pressed into the tub
channel for an interference fit. Center the
gasket (marked on back) at the tub top
center and press in place without stretching
or bunching. The gasket takes a short turn
at the bottom of the tub channel before
ending at the channel end wall.

Mounting
Rib

Tub
Interior

Gasket Cross Section

Short Turn

Product Specifications

Water Supply

Minimum incoming water temperature .........

....................................... 120°F (49°C)

Pressure (PSI) min./max. ................ 20/120

Connection (NPT) ..............................

3

/8

Consumption (Normal Cycle) ....................

......... 7.2 U.S. gal., 6.0 imp. gal., 27.3 liters

Electrical

Rating . . . .. . . . .. . . ................ 120 Volts, 60Hz

Separate Circuit . .. 15 amp min.- 20 amp max.

Motor (HP) .......................................

1

/12

Motor (Amps) .................................. 3.4

Heater Wattage ................................ 900

Total Amps (load rated) ....................... 9.5

Trouble Shooting Tips

Electric Shock Hazard

Check the list below each symptom. Repair or replace defective components as encountered.

Symptom. . .Dishwasher will not operate when
turned on (wait at least 90 seconds).

1. Fuse (blown or tripped).

2. 120 VAC supply wiring connection faulty.

3. Timer (contacts open or defective)

4. Motor (inoperative, check resistances).

5. Door switch (open contacts).

6. Door latch not making contact with door switch.

7. Selector switch (open contacts).

Symptom. . .Motor hums but will not start or
run.

1. Motor (bad bearings or locked rotor).

2. Motor stuck due to prolonged
non-use.

Symptom. . .Motor trips out on internal thermal
overload protector.

1. Improper voltage.

2. Seal faces binding.

3. Motor shaft binding.

4. Motor windings shorted.

5. Glass or foreign items in pump.

Symptom. . .Dishwasher runs but will not heat.

1. Heater element (open).

2. Timer defective.

3. Wiring or terminal defective.

Symptom. . .Dishwasher will not pump out.

1. Drain restricted.

2. Timer contact defective.

3. Defective drain pump.

4. Air lock in drain hose.

5. Make sure hose is attached in proper position on
side of tub.

6. Blocked impeller.

7. Open windings.

Symptom. . .Dishwasher will not fill with water.

1. Water supply turned off.

2. Defective water inlet fill valve.

3. Check fill valve screen for obstructions.

4. Defective float switch.

5. Timer contact defective.

6. Wiring defective.

7. Float stuck in UP position.

Symptom. . .Timer does not advance.

1. Timer motor (stalled or open.)

2. Check timer for power to timer motor.

3. Timer shaft binding to or knob interference with
escutcheon.

Symptom. . .Dishwasher water siphons out.

1. Drain hose (high) loop too low.

2. Drain line connected to a floor drain not vented.
(Install air gap at counter top.)

3. Drain hose not connected to side of tub.

Disconnect electrical power at the fuse box or circuit breaker box before
adjusting or replacing components. Failure to follow this warning could
result in death or serious injury .