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The high limit thermostat trips and cuts power mid-cycle, causing the dishwasher to stop unexpectedly and refuse to restart.
A malfunctioning thermostat may interrupt voltage to the heating element, leaving dishes cold and wet at the end of the cycle.
A failed open-circuit thermostat prevents the control board from initiating a wash cycle, making the dishwasher appear completely dead.
The 'Clean' indicator blinks repeatedly — a common fault code triggered when the heating circuit fails due to a defective high limit thermostat.
If the thermostat incorrectly shuts off the heating element, water temperature drops below optimal levels, resulting in dirty or greasy dishes after the wash cycle.
💡 Pro Tip: Is Your High Limit Thermostat the Culprit?
Your part is likely the culprit if you notice any of the following:
⚠️ Dishwasher stops mid-cycle and will not restart
⚠️ Dishes come out cold or wet — no heated dry
⚠️ "Clean" indicator light blinking repeatedly with no error on controls
⚠️ Dishwasher heats water but shuts off before completing the wash or rinse phase
🔬 Diagnostic Tip: Before replacing, use a multimeter set to continuity mode and probe both terminals of the thermostat at room temperature. A good thermostat reads continuity (closed circuit). If you get an open reading (OL/infinite resistance), the thermostat has blown and must be replaced. Always rule out a faulty heating element first — these two parts often fail together.
📦 What's in the Box
✅ 1× Dishwasher High Limit Thermostat (1/4" terminals, bracket-mount style) — compatible with WP661566 / 661566
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Disclaimer: Compatibility information, part numbers, and model fitment data on this page are sourced from manufacturer databases and third-party references. While we strive for accuracy, please verify your appliance model number before ordering. Heima is not responsible for errors or omissions in compatibility listings.
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