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Electrical symptoms on a dryer deserve more caution than on any other laundry appliance, because this machine combines a high-current heating circuit with a cabinet full of flammable lint. A trip, a smell or a shock is a stop-now situation. On a Bangson dryer the order below is what makes this page worth reading — the causes are ranked for this kind of machine, not listed alphabetically.
What you observe
- The breaker trips when the heat comes on — Timing is the clue: a trip at the heat step points at the element circuit rather than the motor.
- A hot or scorched plastic smell from the back of the machine — Terminal blocks and heater connections are at the back, and they run hot by design. Overheating there is a connection fault.
- A tingle from the cabinet or the door frame — Take it out of service now. That is current on the chassis, which means the earth path has been compromised.
- Scorching at the plug, the cord or the outlet — A high-current appliance on a loose connection generates heat every minute it runs.
- NEAR MISS — the machine is simply dead with no smell — A no-power complaint with no heat, smell or trip is a supply or start question, not a safety one.
What it usually turns out to be
- Heating element shorting to the drum or the cabinet — First, because the element is the highest-current part in the machine and it sags as it ages. A sagged coil touching the housing trips the breaker the instant the heat is commanded, which is why the timing is so consistent.
- Loose or corroded terminal connections — Second. High current through a loose joint makes heat, heat makes oxide, oxide makes more resistance — it is a self-worsening fault and it produces the scorched smell long before anything trips.
- Lint on live components inside the cabinet — Third, and the reason this category is treated seriously: lint is conductive when damp and flammable when dry, and it collects exactly where the heater terminals are.
- Damaged supply cord or an unsuitable outlet — Fourth. Crushed cords behind the machine and adaptors on a heating appliance belong here, and both are visible without tools.
What to check first, second, third
- Note whether the trip follows the heat or the motor — Run an air-only cycle if the machine offers one. Tumbling without tripping isolates the fault to the heating circuit.
- Check the plug and outlet face for heat damage — Unplugged, with a light. Browning or a loose pin is a finding you can act on immediately.
- Smell around the back panel after a cycle — Connection overheating is smelt long before it is seen, and the back of the machine is where it happens.
Step by step, within the safe boundary
- Stop using the machine and disconnect it — This is step one. A dryer with an electrical fault and a cabinet full of lint is not a machine to keep testing.
About 5 min
- Inspect the cord and the outlet — Look for crushing behind the cabinet, discolouration at the pins and any looseness in the socket.
Tools: flashlightAbout 15 min
- Clear all reachable lint from the screen housing and duct — Reducing the fuel load is worthwhile regardless of the electrical diagnosis, and it costs nothing.
Tools: vacuumAbout 30 min
- Check whether other appliances trip the same circuit — It separates a house fault from an appliance fault before anyone is called.
About 10 min
- STOP — do not open the cabinet on an electrical fault — The heater terminals, the motor and the cut-outs are all in there, and none of them are owner-serviceable.
What has to be off before you touch it
Safety
Cut the power before you start and leave it off until the cabinet is closed again. If the machine is gas-fired, close the manual shut-off at the appliance as well. Should you ever smell gas, switch nothing on or off, leave the building and call the gas utility or emergency services from outside.
When this stops being a home job
There is no owner repair in this category, only owner evidence. Record when it trips, whether anything else on the circuit trips, and whether the plug or the back panel smells hot, then hand it over. Any tingle from the cabinet is urgent regardless of everything else: it means the earth path is not doing its job, and that has to be traced before the appliance is used again.
Nearest pages of this class
How specific this page is
Treat this as the generalized Bangson dryer page. It is written to be true across the platform, which means it stops short of the details that only hold for one family — connector pinouts, specific board revisions, the order the cabinet comes apart in. Those live on the family- and model-level pages linked here, and where one exists for your unit, that page outranks this one.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
