Whirlpool, Maytag & KitchenAid Dishwasher High Limit Thermostat Parts — Models & Compatibility

Your Whirlpool dishwasher's high limit thermostat is a critical safety component that prevents overheating during the drying cycle. When it fails, you'll notice dishes coming out wet every time, or the dishwasher refusing to start at all. Part 661566 is the OEM replacement that restores proper heating and drying function across Whirlpool, Maytag, KitchenAid, and Kenmore dishwasher models.

Is This the Right Part for Your Model?

This high limit thermostat (also sold as WP661566, AP6010246, and W10339474) fits hundreds of dishwasher models. Your model number is typically located on the door frame, visible when you open the dishwasher door — it's on a sticker or metal plate along the top or side edge. Match your full model number (including any letters or numbers after the dash) against our compatibility list below.

About This Replacement Part

The high limit thermostat is a thermal cutoff device mounted near the heating element. It monitors temperature during the heating and drying cycles, cutting power if temperatures exceed safe limits. When this part fails, it typically sticks in the open position, which prevents the heating element from receiving power. That's why the most common symptom is dishes that won't dry — the heating element never activates. In some cases, a failed thermostat will prevent the entire cycle from starting because the control board detects the open circuit. This is a direct OEM replacement from Whirlpool that restores factory specifications.

Common Symptoms Indicating Thermostat Failure

• Not drying dishes properly — dishes come out wet after a complete cycle
• Will not start — control panel lights up but cycle won't begin
• Not cleaning dishes properly — inadequate water heating affects wash performance

Compatible Models

This thermostat fits the following dishwasher models (partial list — verify your exact model number):

• WDF520PADM, WDF520PADM3, WDF520PADM7 (Whirlpool)
• WDT730PAHZ, WDT730PAHZ0 (Whirlpool)
• WDT720PADM (Whirlpool)
• WDF330PAHS (Whirlpool)
• WDT710PAYM6, WDT710PAYM4 (Whirlpool)
• ADB1400AGW (Whirlpool)
• MDB7749AWM2 (Maytag)
• 665.13153K701 (Kenmore)
• 665.13213K901 (Kenmore)
• 665.13593K600 (Kenmore)

What's Included

You'll receive one high limit thermostat with wire leads. This is the complete replacement part — no additional components needed. The thermostat comes ready to install with factory-crimp connections.

Installation Overview

Disconnect power to the dishwasher before starting any repair. You'll need to remove the lower access panel or door panel to reach the thermostat, which is typically mounted near the heating element at the bottom of the tub. The old thermostat pulls off the mounting bracket, then you disconnect the wire terminals. Installation reverses the process — new thermostat onto the bracket, reconnect the wires, reassemble panels, restore power and test.