Fall Kickoff Sale - Save 10%
  • Home
  • Why does my dishwasher smell like burning? Causes and fixes

Why does my dishwasher smell like burning? Causes and fixes

By: Reliable Parts • August 2026

A burning smell from a dishwasher is most often caused by a plastic item melting on the heating element, an overheating pump or motor, or an electrical fault at the element terminals or wiring. Melting plastic is the common cause; a hot electrical smell is the serious one. Stop the cycle, disconnect power, and find the source first. Identify your dishwasher’s model number to order the correct replacement parts.

Need step-by-step instructions for your specific brand and model? Visit our DIY Repair Guide and filter by appliance and brand.

Safety information

Disconnect power at the breaker at the first burning smell and before any inspection - dishwashers are typically hardwired, and the element circuit is the highest-current path in the machine. Let the element cool fully before touching it. If you find scorched wiring, melted terminals, or any smoke, do not restore power until the damaged wiring is repaired; if there is ever open flame, close the door, leave, and call the fire department.

Most common causes

  1. Plastic melting on the heating element — a lid, utensil, or container dropped through the rack onto the element; the most common cause by far, with a distinct melting-plastic odor.
  2. Overheating pump or wash motor — a failing bearing or a motor straining against a jam runs hot with a sharp electrical smell.
  3. Heating element terminal fault — corroded or loose element connections under the tub arc and overheat their wiring.
  4. Wiring or connector damage — a chafed harness or moisture-corroded connector melts insulation; the most serious source.
  5. Detergent or food residue baking on the element — a film burning off produces an acrid smell, usually early in ownership or after heavy soil.
  6. New-machine break-in — a faint hot smell for the first cycle or two as coatings cure; a strong or persistent smell is never break-in.

Step-by-step diagnosis

  1. Stop the cycle, let the machine cool, and disconnect power at the breaker. Don’t run further cycles to see if the smell fades - melting plastic and electrical heat both get worse with time, not better.
  2. Open the door and inspect the heating element - the exposed loop at the tub floor on most models. Look for melted plastic fused to it: a lid, spatula, or fallen container is the usual finding. Remove the debris once fully cool; hardened residue scrapes off with a plastic scraper after a warm soak.
  3. Check the tub floor, sump area, and lower rack for the item that dropped - and for anything else hanging below the rack line. Small plastic lids and cutlery slipping through the rack are the repeat offenders; use the covered sections of the cutlery basket for small items.
  4. After clearing debris, restore power and run a short heated cycle empty, staying nearby. A faint residual odor as the last film burns off is normal once; any renewed or different burning smell means stop and continue the diagnosis on the electrical side.
  5. Inspect the heating element terminals. With power off, remove the kick panel and check the two element connections under the tub for discolored, melted, or corroded terminals. Damaged terminals must be cut back and replaced with high-temperature terminals, and a heat-damaged element replaced with them.
  6. Check the pump and wash motor. Clear the sump of debris, confirm the impellers turn freely, and sniff at the motor area after the assessment cycle - a motor that smells hot or trips out has failing bearings or windings and should be replaced.
  7. Inspect the wiring harness and junction box last. Look for chafed insulation where the harness passes the frame, moisture tracks into connectors, and browned wire nuts in the junction box. Repair damaged wiring properly before the machine returns to service.

Replacement parts to consider

Common parts for a burning smell: heating element, high-temperature terminal repair kit, wash motor or pump assembly, wiring harness section, cutlery basket (to stop repeat drops). Enter your dishwasher’s model number on reliableparts.com for the exact parts for your specific model.

Related FAQs

Why does my dishwasher smell like burning plastic?

Almost always because plastic is burning: a lid or utensil slipped through the rack onto the heating element and is melting against it. Stop the cycle, let everything cool, and peel the plastic off the element. The smell lingers a cycle or two after cleanup, then fades - if it doesn’t, keep diagnosing.

Is a burning smell from the dishwasher dangerous?

Melting plastic caught early is smelly but manageable; a hot electrical odor is the serious one - arcing element terminals or damaged wiring are genuine fire risks inside a wooden cabinet. Either way the response is the same: stop the machine, kill power, and find the source before the next cycle.

How do I get melted plastic off my dishwasher heating element?

With power off and the element fully cool, pick off the bulk by hand, then soften the rest - a bag of hot water laid on the spot or a brief no-heat rinse - and scrape gently with a wooden or plastic scraper. Never use a knife on the element’s surface. A hazy stain left behind is cosmetic.

Why does my dishwasher smell like burning only during the dry cycle?

The dry phase is when the element runs hottest with no water over it, so residue or plastic traces on the element announce themselves then. It also exposes marginal element terminals working at full load. Clean the element first; if the dry-phase smell persists, inspect the terminals underneath.

Can I keep using my dishwasher if the burning smell went away?

If you found and removed a melted item and the smell faded over a cycle or two, yes. If the smell stopped without a found cause, be cautious - intermittent electrical faults quiet down and return. At minimum, inspect the element terminals and run one watched heated cycle before trusting it unattended.