Dryer occasionally trips the household circuit breaker or RCD.

Safety first: This involves potentially dangerous faults. If you are not experienced, contact a qualified technician.

• Isolate timing: Note whether the breaker trips immediately on start, after some heating, or randomly.
• Inspect power cord and plug: Look for damage, burns, or loose connections. Replace if suspect.
• Test heater to ground: With the dryer unplugged, use a multimeter to check resistance between heater terminals and chassis. Any low resistance indicates a ground fault; replace the heater.
• Check for moisture: Inspect the base tray and control area for water. Dry thoroughly and fix any leaks.
• Motor test: Test motor windings for shorts to ground. Replace the motor if faulty.