Tappan Dishwasher Not Rinsing, Silent in Rinse Mode: Circulation Pump Replaced in Mountain View
An older Tappan TDB210RFS7A in Mountain View went quiet during the rinse. The circulation pump motor was not running, so I replaced the pump assembly and its seals.
Repair at a glance
| City | Mountain View, CA |
|---|---|
| Appliance | Dishwasher |
| Category | Major Brands |
| Brand & model | Tappan TDB210RFS7A built-in dishwasher |
| Repair date | |
| Customer complaint | The dishwasher didn't rinse. It stayed silent in rinse mode, with no spinning or any sounds. |
| Diagnosis | The dishwasher circulation pump was not working and needed to be replaced. |
| Repair cost | $367 (parts and labor) |
| Warranty | 6 months on parts and labor |
| Outcome | Repaired |
What I found
The tenants said the dishwasher used to work normally, just a bit noisy, until it stopped rinsing. In rinse mode it stayed silent: no water spraying and no motor sound at all.
I checked the circulation pump underneath and it was not running. The dishwasher is quite old, but overall it was in good condition, so replacing the pump made sense.
How I replaced the circulation pump
I disconnected the dishwasher, pulled it out of the cabinet and turned it so I could reach the pump assembly at the bottom of the tub. After removing the wiring and hoses, I took the old pump out and set it next to the new one to compare the mounting and the seal rings.
The new pump went in with fresh seals so it would not leak at the sump. I reconnected everything, set the dishwasher back into the cabinet and ran it to confirm it filled, circulated and rinsed.
Result
The dishwasher rinses again with the new circulation pump. The total was $367 with a 6-month warranty on parts and labor.
Part replaced: circulation pump assembly.
Photos from this repair
The Tappan dishwasher before the repair. 
The dishwasher pulled out to reach the pump. 
The circulation pump in place under the tub. 
The removed circulation pump. 
The old pump next to the replacement. 
Comparing the tops of both pumps. 
The new pump and seal rings ready to install.
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