Thermador Dishwasher Error Code E22 — Wash Motor Circulation Pump Fault
What this means
Error E22 on Thermador dishwashers indicates the main wash motor (circulation pump) has failed or is not reaching the required flow rate. The circulation pump is the core component that sprays water through the spray arms during the wash cycle. Without proper pump operation, dishes will not be cleaned. Causes include a jammed pump impeller, a failed pump motor, a clogged filter restricting flow, or a wiring fault. This code is sometimes intermittent if debris periodically blocks the impeller.
Alternate codes: E:22
Step-by-step fix
3 stepsClean the filters thoroughly
Remove and clean the drain filter, coarse filter, and fine mesh filter. Food debris accumulating in the filters can restrict water flow to the circulation pump, triggering E22. Clean the sump area beneath the filters as well.
Thermador recommends running a maintenance wash cycle with a dishwasher cleaner monthly. Heavy use without filter cleaning is a common precursor to E22.
Check for impeller obstructions
With the filters removed, check the wash pump impeller area. On some Thermador models, you can see or reach the impeller through the sump opening. Remove any objects (glass, bones, plastic) that may be jamming it. The impeller should spin freely.
A grinding noise during the wash cycle is a strong indicator of a foreign object in the circulation pump.
Test the circulation pump motor
Disconnect power. Access the circulation pump motor beneath the tub (requires removing the bottom panel and possibly pulling the dishwasher out). Disconnect the wire harness and test the motor windings for continuity. No continuity confirms a burned-out motor.
On newer Thermador dishwashers, the circulation pump and motor are a single sealed unit — they must be replaced together.
When to call a professional
Circulation pump replacement on Thermador dishwashers requires removing the unit from the cabinet and working underneath. If you are not comfortable with this level of disassembly, professional service is recommended.
Related error codes
Information compiled from manufacturer service manuals, official troubleshooting documentation, and appliance repair industry resources. This guide is for informational purposes only — always consult a qualified technician for complex repairs.
Learn more about our sourcesParts you may need
Wash Motor / Circulation Pump Assembly
Part #00655638 · $120–$250
If motor has no continuity or impeller is broken
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