Whirlpool dishwasher not draining is a known issue affecting WDT730PAH series. Our technicians specialize in Whirlpool-specific diagnostics and repair.
Whirlpool dishwasher not draining is typically caused by clogged drain hose or failed drain pump. Whirlpool-specific factor: chopper blade blockage in sump — hard food debris jams the macerator. Repair costs $100-$250 with free diagnostic and 90-day warranty.
Chopper blade blockage in sump — hard food debris jams the macerator
Drain solenoid failure preventing drain valve from opening
Drain motor/pump assembly burnout from extended blockage
Check ball valve stuck from grease and mineral accumulation
Garbage disposal knockout plug not removed during installation
Other Whirlpool models may also be affected. Book a free diagnostic for confirmation.
Seeing one of these codes? It likely indicates not draining.
Bay Area Whirlpool dishwasher drain problems frequently trace to garbage disposal connections — during kitchen remodels, contractors sometimes forget to remove the disposal knockout plug, leaving the dishwasher drain hose connected to a blocked port. This is especially common in San Francisco and Oakland renovations where existing plumbing is adapted rather than replaced.
Remove lower spray arm and cylindrical filter — inspect chopper blade area for hard food debris (bones, fruit pits, glass fragments)
Check garbage disposal connection: disconnect drain hose, verify knockout plug was removed (use flashlight inside disposal inlet)
Run Whirlpool diagnostic drain cycle: press Heated Dry + Normal + Heated Dry + Normal within 6 seconds — advance to drain step
Test drain solenoid with multimeter — should read 30-40 ohms; infinite reading means coil is open and solenoid needs replacement
The technician removes the filter and sump assembly to inspect the chopper blade area. Hard debris is cleared and the blade is tested for free rotation. If the drain solenoid has failed, it is replaced on the drain valve body — a 30-minute repair with the unit pulled out. The technician also checks the air gap and disposal connection, removing any forgotten knockout plug if present.
| Diagnostic | Free |
| Typical repair | $100–$250 |
| Repair time | 1-1.5 hours |
| Warranty | 90 days parts + labor |
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Refrigerator Repair
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Dishwasher Repair
San Francisco, CA
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Washing Machine Repair
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