Dishwasher Not Washing or Spray Arms Not Spinning? Circulation Pump 9788191 – Fix No Wash Action Fast
When your dishwasher runs a full cycle but dishes come out dirty, the spray arms aren't spinning, or there's no washing action at all, the circulation pump is the primary suspect. In most Bosch dishwashers, the circulation pump pressurizes water and forces it through the spray arms to clean the load. When it fails, water may fill and drain normally but never circulate — leaving dishes completely unwashed or with standing water pooling at the bottom. ⚡ Common failure point in Bosch dishwashers — especially after debris ingestion or bearing wear over time. Part 9788191 is the genuine OEM replacement that restores full water pressure, spinning spray arms, and effective wash performance.
❓ Is This the Right Part?
This is the correct fix if ALL of the following are true:
- ✔ Dishwasher powers on and the control panel responds normally
- ✔ Water fills and drains correctly — the tub fills and empties as expected
- ✔ Water supply pressure confirmed OK — inlet valve is functioning
- ✔ ONLY problem is no wash action, weak spray, or dishes not getting clean
Not sure? Send us your model number — we'll confirm before you order.
🔧 Common Symptoms
- Dishwasher runs full cycle but dishes come out dirty or unwashed
- Spray arms not spinning or barely moving during cycle
- Humming or grinding noise during wash cycle with no water movement
- E-series error code related to wash motor or circulation fault
✔ If these symptoms match, this is the most likely failed component in the system.
✔ In most cases, replacing this circulation pump restores full wash performance immediately.
📦 Part Details
- Part Number: 9788191
- Type: Dishwasher Circulation Pump (Wash Motor / Spray Arm Pump)
- Brands: Bosch
- Application: Dishwasher wash cycle water circulation and spray arm pressurization
While the pump is out, inspect the spray arm nozzles for clogs and the sump filter for debris buildup — a blocked filter is often what caused the pump to fail in the first place. Clean or replace both before installing the new pump to protect it from the same fate.
⚙️ Installation
Skill Level: MODERATE — 45–60 minutes. Disconnect power and water supply before servicing. Remove the lower spray arm, filter assembly, and sump cover to access the circulation pump. Disconnect the wiring harness and water lines, remove the pump mounting, and swap in the new unit. Reassemble in reverse, restore power and water, and run a short cycle to confirm full spray arm rotation and wash performance.
✓ Compatible Models
Compatible with select Bosch dishwasher models. Contact us to verify your model number before ordering.
✓ Model-Specific Repair Pages
💡 Pro Tip
A severely clogged sump filter can mimic a dead circulation pump — the motor runs but can't move water. Before ordering, remove and clean the filter completely, then run a cycle. If the pump still doesn't circulate water after a clean filter, the pump itself is the fault and this is the correct replacement.
✅Compatibility & Cross Reference
Not sure about your model number? Call 1-877-899-7278 and we’ll help you confirm. All brand names are the property of their respective owners and are used for compatibility reference only.
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