The answer first
A dishwasher that smells hot, trips a breaker, buzzes at the outlet or gives you a tingle is not a machine to keep using while you think about it. Disconnect it first and diagnose second, because every cause on this list gets worse with each cycle. Work the conditions first; the components are the shorter half of this list. Most of it is settled before a tool comes out.
What you observe
- A tingle or shock when touching the door or a nearby metal surface — A bonding or insulation fault, and the most urgent symptom on this list.
- Buzzing or crackling from the outlet or the machine base — Arcing, which is fire risk rather than an inconvenience.
- A hot plastic or burning smell during or after a cycle — Something in the current path is overheating, most often a connection rather than a component.
- NEAR MISS: the machine simply will not start and nothing smells or heats — That is a start or door-latch fault and it belongs on a different page.
Causes, most likely first
- Loose, corroded or overheated supply connection — First, and first for a reason. It leads on a machine of this class because the appliance is built into a run of units and its supply connection is made once, behind a cabinet, and never inspected again. Connections make heat when they stop making contact, and a dishwasher draws hard while heating. This is the most common source of a burning smell and of scorching at a plug.
- Water reaching a component or junction that should stay dry — Second. A slow leak from a hose, a seal or the tub finds wiring below the tub, and the fault appears at the point in the cycle where the leak is worst.
- Heating element or heat pump breaking down to earth — Third. An element that has failed internally trips the protective device the moment it is energised, which is why the fault appears at the same point in every cycle.
- Earth or bonding fault — Fourth. The reason a shock is possible at all. It is not a fault that announces itself until something else fails, and then it is the difference between a nuisance and an injury.
- Body: Ranked for a Big Chill dishwasher specifically. The order is the value here; the list on its own would be the same list anyone could write.
Where to start, and what comes next
- Switch the circuit off at the breaker before anything else — Every remaining check is done on a machine with no power to it.
- Look at the plug, socket and visible cable for heat damage — Discolouration, melting and a smell of hot plastic all point to the same place.
- Note exactly when in the cycle the fault appears — A trip during heating, during drain or at fill each convicts a different circuit.
- Body: The order below is written to be done with the machine isolated. Nothing here involves energising the appliance to see what happens.
Owner-side checks, step by step
- Isolate the machine at the breaker and leave it isolated — Do not run another cycle to reproduce the symptom.
- Check whether other things on the same circuit are affected — A circuit-wide symptom moves the investigation out of the appliance entirely.
- Write down the point in the cycle at which it happens — Fill, wash, heat, dry or drain: the answer narrows the fault to one circuit.
- STOP. Do not open the machine or test anything live — There is no owner-side test beyond observation for this class of symptom.
Safety, before anything else
Safety
Unplug the appliance or switch off its breaker before removing any panel; a capacitor can hold a charge after the power is off. If you have felt a shock from the machine, leave the circuit off and do not use the appliance again until it has been checked.
When to stop and call
This whole class of symptom is a service call. Isolate the machine and have it checked if it smells hot, trips a breaker, buzzes, scorches a plug or gives anyone a shock. Say whether the machine refuses to start or stops partway: they are different faults.
Nearest pages of this class
What is deliberately not here
This page is written for the appliance class rather than for one Big Chill family or model line. Where a family- or model-specific page exists for your unit it is the more specific answer and should be preferred over this one; the brand and appliance hub linked below routes to everything more specific that exists today.
Links: - [Common BIG CHILL Dishwasher Problems](/blog/big-chill-dishwasher-problems)
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
