Whirlpool Dishwasher Thermal Fuse & Harness Parts — Models & Compatibility

Your Whirlpool dishwasher won't start, the control panel's dead, and you've already checked the breaker — twice. Before you call for service, there's a $36 part that fails more often than most techs will admit: the thermal fuse and harness assembly. This safety component cuts power when it detects overheating, and once it blows, your dishwasher becomes an expensive drying rack until you replace it.

This hub covers the 675813 thermal fuse and harness assembly, which fits multiple Whirlpool dishwasher series including DU920, DU940, DU943, DU945, and DU948 models. We'll show you how to verify compatibility with your specific model and what makes this a straightforward fix for most homeowners.

Is This the Right Part for Your Model?

The model number on Whirlpool dishwashers is typically located on the inside edge of the door frame — open the door and look along the top or side. You'll see a plate with your complete model number, which might look like DU920QWDB4 or DU945PWPQ2.

Cross-reference that exact model number (including the suffix number after the letters) with the compatibility list below. The thermal fuse assembly is model-specific because the harness connector must match your dishwasher's wiring configuration. Installing the wrong harness means you'll be doing this job twice.

About This Replacement Part

The 675813 thermal fuse serves as your dishwasher's primary overheat protection. It's a one-time safety device — when internal temperatures exceed safe limits (usually from a failed heating element or blocked vent), the fuse opens permanently and cuts all power to the control board. Unlike a circuit breaker, it won't reset. You're replacing it.

This assembly includes both the thermal fuse and the wire harness with connectors, which is why it costs more than a standalone fuse. The harness portion is actually the smart part to replace — those wire terminals corrode over time from dishwasher humidity, and trying to reuse old connectors often leads to intermittent power issues down the road.

Whirlpool didn't put this fuse in an easy spot. You'll need to pull the dishwasher out from under the counter to access the lower front panel, then locate the fuse assembly near the base of the tub. The actual replacement takes about 10 minutes once you've got the machine accessible. The real time investment is disconnecting water and power, then sliding a 100-pound appliance without scratching your floor.

Compatible Whirlpool Dishwasher Models

This thermal fuse and harness assembly (part number 675813, replaces AP3115186, 3375557, 3376359, and 679723) fits the following Whirlpool dishwasher models:

• DU920QWDB4, DU920QWDB0, DU920QWDQ4 — Whirlpool DU920 series
• DU920PFGQ3, DU920PFGB3, DU920PFGZ2 — Whirlpool DU920 series
• DU940PWKB0 — Whirlpool DU940 series
• DU943PWKQ0, DU943PWKB0, DU943PWKT0 — Whirlpool DU943 series
• DU945PWPQ0, DU945PWPQ2, DU945PWSQ0 — Whirlpool DU945 series
• DU948PWKQ1 — Whirlpool DU948 series

This part also works with select Kenmore, KitchenAid, and Maytag dishwashers that share the same platform. If your model isn't listed above, check the full compatibility data or contact us with your complete model number.

What You're Getting

The 675813 replacement kit includes the thermal fuse component factory-attached to approximately 12 inches of wiring with the correct female spade connectors for your dishwasher's main wiring harness. You're not splicing wires or crimping terminals — this is a plug-and-play replacement that connects exactly like the original factory part.

Before you order, make sure you actually need the thermal fuse. If your dishwasher has power to the control panel but won't run a cycle, you're probably dealing with a different issue (door latch, control board, or pump). The thermal fuse kills all power — no lights, no display, nothing. Test for 120V at the dishwasher's junction box first. If power's there but the control board's dark, the thermal fuse is your likely culprit.