Hobart dishwasher shows E7; wash pump does not start or stops shortly after starting.

Safety first: Disconnect power and allow the machine to cool before accessing the pump area.

• Check for obstructions: Remove lower wash arms and filters to access the sump. Inspect for broken glass, cutlery, or heavy debris that could jam the wash pump impeller.
• Spin impeller by hand: If accessible, gently rotate the wash pump impeller by hand (with power off). It should turn smoothly. If seized, the pump may need replacement.
• Listen for motor behavior: Restore power and start a cycle. A humming sound without rotation suggests a jammed impeller or failed start capacitor (on some models).
• Check electrical components: Only if qualified, test the motor windings and capacitor with a multimeter. Inspect the pump contactor or relay for burned contacts.
• Replace pump assembly if needed: If the motor is open, shorted, or mechanically seized, replace the complete wash pump assembly. This is typically a technician-level repair due to weight and wiring complexity.