Whirlpool Dishwasher Heating Element Replacement — Testing, Wiring & Installation

The heating element in a Whirlpool dishwasher is a circular or horseshoe-shaped resistance coil mounted at the bottom of the tub, submerged in the wash water. It serves two functions: heating water during the wash cycle to improve cleaning performance (Whirlpool heats incoming water from your home's 120 degree F supply up to 140 degree F), and generating radiant heat during the dry cycle to evaporate moisture from dishes.

When the element fails, you get two symptoms simultaneously: dishes are not as clean (because wash water never reaches optimal temperature), and dishes come out wet (because the dry cycle has no heat source). If you only have one of these symptoms, the element might not be the problem.

Testing the Element Before Replacing

The heating element is easy to test with a basic multimeter. Disconnect power at the breaker first.

Continuity test: Access the element terminals under the tub. Remove the lower access panel (two 1/4-inch hex screws) and locate the element terminals — two insulated wires connecting to threaded studs on the underside of the tub. Disconnect the wires and set your multimeter to ohms. Measure across the two element terminals:

• 15-30 ohms — element is good. The problem is elsewhere (control board relay, wiring, or thermostat)
• Open circuit (infinite/OL) — element wire has burned through internally. Replacement required.
• Very low resistance (under 5 ohms) — element has an internal short. Replacement required.

Ground fault test: With wires still disconnected, measure between each element terminal and the metal tub body:

• Open circuit — normal, no ground fault
• Any continuity reading — the element insulation has broken down and current is leaking to the chassis. This can trip your GFCI breaker or the home circuit breaker during the heating portion of the cycle. The element must be replaced even if it still heats.

The Element-Thermostat Safety Pair

The heating element works in tandem with a high-limit thermostat (typically mounted on the tub near the element) that cuts power to the element if the water temperature exceeds a safe limit (typically 195 degrees F). If the thermostat has failed open, the element receives no power even though the element itself is fine. Always test the thermostat continuity before condemning the element:

• Thermostat should show near-zero ohms (continuity) at room temperature
• If open (infinite) at room temperature, the thermostat has tripped permanently and needs replacement ($10-20)

Part Numbers and Cost

Step-by-Step Replacement

Tools needed: 1/4-inch nut driver, adjustable wrench or pliers for terminal nuts, multimeter, towels

1. Disconnect power at the breaker
2. Remove the lower access panel (two 1/4-inch hex screws)
3. Place towels under the tub — residual water will drip when the element is removed
4. Locate the element terminals underneath the tub — two threaded studs with wire connectors and nuts
5. Photograph the wire connections
6. Disconnect the wires from both terminals (note which wire goes where)
7. Remove the terminal nuts holding the element to the tub — these are typically 3/8-inch or 7/16-inch
8. Push the terminals inward through the tub floor
9. Open the dishwasher door and remove the lower dish rack
10. Lift the old element out from inside the tub — note the routing path around the spray arm post
11. Place the new element in the same position inside the tub, routing it around the spray arm post identically
12. Push the terminals back through the tub floor from inside
13. From underneath, install the rubber or fiber sealing washers (included with the new element) onto the terminal studs
14. Thread the terminal nuts and tighten — snug but not over-tightened, or you risk cracking the tub material around the holes
15. Reconnect wires to the correct terminals
16. Reinstall the lower rack and close the door
17. Reinstall the access panel, restore power, and run a short cycle to test both heating and leak-free seals

Critical Installation Detail

The sealing washers between the element terminals and the tub floor are what prevent leaks. These washers compress to create a watertight seal when you tighten the terminal nuts. If you reuse the old washers (which have taken a permanent compression set), the connection will leak. Always use the new washers included with the replacement element. If your element did not come with washers, order them separately — they cost $2-5.

Common Mistakes

• Over-tightening the terminal nuts — the tub material (plastic on many models) cracks around the holes, creating a permanent leak that requires tub replacement ($400+)
• Not testing the thermostat — replacing a $50 element when a $12 thermostat is the actual problem
• Ignoring the ground fault — a tripping breaker during the wash cycle is almost always a ground-faulted element, not a wiring problem
• Forgetting to test after installation — run a short cycle immediately and check under the unit for drips at the terminal seals

Lifespan

Heating elements in Whirlpool dishwashers typically last 8-15 years. They fail most often from mineral scale buildup on the surface (hard water areas), which insulates the element and causes it to overheat locally, eventually burning through the resistance wire. Periodic descaling with citric acid or white vinegar can extend element life significantly.

FAQ

My Whirlpool dishwasher trips the breaker — is it the element?

Most likely. A ground-faulted element leaks current to the chassis, which trips GFCI or standard breakers. Test by measuring between each element terminal and the tub body — any continuity indicates a ground fault.

Can the heating element cause the dishwasher to not clean well?

Yes. Whirlpool dishwashers heat incoming water from 120 to 140 degrees F. Without the element, detergent does not dissolve fully, grease does not emulsify, and enzyme-based cleaning agents do not activate. The wash cycle runs but cleaning performance drops significantly.

How can I tell if it is the element or the control board relay?

Test the element with a multimeter first (15-30 ohms = good element). If the element is good, test for 120V AC at the element terminals during the heating phase. Voltage present but no heat = element failure. No voltage = board relay or thermostat issue.

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