Dishwasher Parts Issues; Circulation Pump - Impeller - Bosch SHI4302 Manual

VIII. Troubleshooting
VIII. Troubleshooting

Dishwasher Parts Issues

Dishwasher Parts Issues
Water valves....
overtightened -- some valves are damaged from hard water or debris from customer
pipes clogging them so they can't close securely. A damaged valve can allow some
water onto kitchen floors.
Impellers or circulation pumps....
but expectations are high for dishwashers in rarely used summer homes.
Control modules....
"2H" fault codes, modules can fail occasionally. However, many good modules have
been replaced due to unrelated problems.
Heaters & NTC's....
other parts to check as well....
Drain pumps....
Many good pumps have been replaced because high loops were missing.
Dispensers....
Cosmetic damage....
Door latches....
models. Understandable considering how dishwashers are treated.
Aqua sensors....
Water fill assemblies....
have been flipped upside-down, allowing sump water to get into diaphragm.
Circulation Pump
Circulation Pump
Symptom
Impeller won't turn.
Impeller won't turn.
Impeller won't turn.
Impeller won't turn.
WARNING! Unplug dishwasher before starting any repairs.
Most damaged valves occur from being cracked by fittings being
From heater relay solder joints to broken buttons to "F" or
Either one can cause heating problems, but there can be
Check drain hose installation 1st to confirm if it's the pump or not.
Repairs often due to customer abuse.
Dinged doors and broken buttons, often during shipment.
Most problems are due to broken microswitches on integrated
Not crucial to operation, but can affect energy & water usage.
- Impeller
- Impeller
Problem
Impeller is frozen. Replace impeller with impeller kit # 167085. If
Impeller cannot be
broken loose.
Debris binding
pump.
Motor is faulty.
They're improved and perform well,
Microswitches can fail. Can be affected when units
not able to replace impeller, place 8mm
nutdriver on 8mm stud on impeller and rotate
clockwise twice until impeller is freed up (for
temporary fix until impeller can be replaced).
Replace impeller with impeller kit # 167085. If
pump is faulty, replace entire pump assembly.
Open sump & remove sump pump cover, then
carefully remove debris from impeller. Check
for broken glass to avoid being cut.
Check resistance at motor terminals or at
control panel (~ 7 Ω with water switch or 10 Ω
without). Replace motor if faulty.
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Solution