Field pattern: dishwasher not cleaning (hot water, filter and spray arms before the pump)
Modern dishwashers use little water, so cold water in the supply line, a clogged filter or blocked spray-arm holes ruin cleaning long before a wash pump fails. Techs check incoming water temperature, the filter, spray arms and loading first. Replacing the circulation pump on a filter or water-temperature complaint is the expensive wrong turn.
Before you start
- Unplug or turn off the breaker before reaching into the sump area
- Watch for broken glass in the filter and sump
Diagnostic steps
Unlock all 7 steps with expected values
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