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Trouble light on / ozone smell / dusty rooms / constant arcing

What is going on

Possible causes and checks for: trouble light on / ozone smell / dusty rooms / constant arcing.

Likely causes

  • Dirty or wet cells
  • Electrical fault (rectifier, power pack caps, ionizing wires, insulators)
  • Bent plates
  • Overload from carpet/construction/leaky ducts

Check in this order

  1. Clean cells & screens, dry fully
  2. Check doors closed, switch, fuses, meter/indicator codes
  3. "dry" switch or run blower
  4. High-voltage probe
  5. Replace broken wires/insulators
  6. Straighten plates

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Source: General HVAC service practice — verify per model. Written in our own words; check the manual for your exact model.

For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.