How to Replace a Dishwasher Heating Element

Confirm the heating element is the problem

Before ordering a replacement, look for the symptoms that point to the heating element. Dishes that come out wet or cold, water that never feels hot, visible cracks or blisters on the coil, and a burning smell during a cycle all suggest the element has failed. A bad element may also be related to dishes not drying or water that does not heat.

Not every drying problem is caused by the element. The thermostat, thermal cutoff, or the drying fan can also be at fault. If the element is exposed and you can see obvious damage, replacement is usually necessary. If it looks intact, test it with a multimeter before you buy a new part. Heavy heating element scale can also reduce performance before the element fails completely.

Safety and preparation

Start by disconnecting the dishwasher from power. Turn off the circuit at the breaker, not just the dishwasher control panel. If the machine is plugged in, unplug it. For hardwired models, the work is done at the breaker, and you can review the electrical connection before touching any wires. Follow the same wiring safety rules you would for any appliance repair.

Turn off the water supply if you need to move the dishwasher or if any hoses block the lower access panel. Place towels below the tub to catch water that drips from the element area. Remove the lower rack and, in many models, the lower spray arm to expose the heating element at the bottom of the wash tub. If the original manual is lost, the maker's support pages often show an exploded view and list compatible parts; Bosch maintains product support pages for its appliance lines, for example.

• Multimeter set to measure resistance
• Screwdriver or nut driver for the access panel
• New heating element and any gasket included with it
• Towels and a small container for stray water
• Pliers or wire connectors, depending on your model

Remove the old heating element

With the interior exposed, locate the heating element. On models with an exposed element, it sits near the bottom of the tub below the lower spray arm and looks like a metal loop or coil. Some dishwashers use a hidden heating element or a heating system built into the wash pump or drying passage; those designs may require removing more parts, so consult the manual for the exact procedure.

Take a photo of the original wiring before disconnecting anything. Remove the mounting nut, bracket, or retainer that holds the element in place. Pull the element out of the tub carefully so you do not damage the tub surface or the gasket opening. If the replacement includes a new gasket, set it aside for installation. If the old gasket is worn, replace it during the same job.

Test the old element with a multimeter

Testing the old part tells you whether the element is really the problem and gives you a baseline for comparing the new part. Set the multimeter to the resistance scale. Touch the probes to the element terminals. A good heating element should show a low resistance reading; a failed one often reads as an open circuit. If the reading does not match the manual's expected range, replace the element.

Also test from each terminal to the metal shell or to the dishwasher ground. Any meter reading in that test means the element is shorted to ground and is unsafe to keep. This check is part of good ground connection practice. If the element passes those tests, look elsewhere before ordering a part, including the thermostat.

Install the new heating element

Insert the new element through the same opening in the tub. Seat the gasket evenly so the new element does not leak. Secure the element with the mounting nut, bracket, or retainer that came with the machine or with the replacement kit. Tighten the hardware firmly, but avoid crushing the gasket.

Reconnect the wires to the same terminals you recorded in the photo. Make sure the wire connectors are snug and that no copper strands are loose. Before replacing panels, check that the wiring is routed away from moving parts and that the element does not touch the lower rack or spray arm. Reinstall the lower spray arm, rack, access panels, and any hoses you moved.

Restore the water supply and the electrical power at the breaker. Run a short cycle with an empty tub and watch for leaks from the element area. If the dishwasher heats and dries without leaking or tripping the breaker, the replacement was successful.

Repair or replace

Replacing the heating element makes sense when the rest of the dishwasher is sound. If the tub, pump, wiring, or control board has also failed, the repair can grow quickly. Compare the repair against the machine's age and condition before ordering parts. The repair versus replacement decision can help you choose.

Modern dishwashers are more efficient than older models. Current ENERGY STAR certified models meet updated criteria from the Department of Energy and the Environmental Protection Agency, and the criteria define standard-capacity and compact-capacity classes for energy and water use. The EPA notes that water supplies are under stress, so a newer dishwasher can save water over time. If your dishwasher is old and you are already repairing a major component, a replacement may offer better drying and lower water use. If you decide to replace it, see the best built-in dishwashers or a brand-focused guide such as best Bosch dishwashers.

What to pick for your use

Questions

Is it safe to replace a dishwasher heating element yourself?

It is safe if you disconnect the power at the breaker and follow basic electrical safety. Treat every wire as live until you have confirmed the circuit is off. If you are not comfortable working around electrical connections, have a professional do the work.

How can I tell if the heating element is bad before I remove it?

Look for cracks, blisters, or obvious breaks in the coil, and watch for water that does not heat or dishes that do not dry. For a definite check, test the element with a multimeter after removing power. A failed element often reads as an open circuit or as a short to ground.

Do I need to test the element with a multimeter?

Not if it is visibly broken, but it is a useful step when the element looks normal. Testing avoids buying a part you do not need and also lets you check the thermostat at the same time.

Can a faulty heating element make the dishwasher trip the circuit breaker?

Yes. An element shorted to ground or with damaged wiring can draw excessive current and trip the breaker. After replacing the element, confirm the ground check is clean before returning the dishwasher to service.

Will every dishwasher heating element be in the same location?

No. Most exposed elements are at the bottom of the wash tub under the lower spray arm. Models with hidden heating elements or integrated dryer heaters can place the heater in a different area, so follow the layout in your owner's manual.

Should I replace the thermostat at the same time?

You do not have to, but it is worth testing it while the old element is out. If the thermostat also fails the multimeter test, replace it while the dishwasher is already open.