HVACopedia

Napoleon · Gas fireplace troubleshooting

Test: spill switch and wall switch/thermostat wiring

What is going on

Isolate a bad switch from bad wiring, and check spill switch continuity.

Likely causes

  • Failed spill switch
  • Failed wall switch/thermostat
  • Damaged wiring

Check in this order

  1. Spill switch disconnect all wires, meter on ohms across the two spade terminals; the manual says replace the switch if it reads 1 ohm or higher.
  2. Wall switch/thermostat with switch leads on valve terminals 1 & 3 (top and bottom), disconnect the leads at the switch end and join them together.
  3. Turn the valve on - if the burner lights, the wiring is good and the switch is faulty.
  4. Warning: a spill switch / vent safety switch may be bypassed only temporarily for testing - it is illegal to leave it bypassed. Restore before leaving.

Applies to: Napoleon gas fireplaces (spill switch applies to natural-vent units)

More gas fireplace guides

Related

Napoleon error codes · Calculators and reference tables

Take it to the job

All guides, error codes and tips work offline in the HVACopedia app.

Open the app

Source: Napoleon (Wolf Steel) Service Manual W415-0118, Part 5 Testing & Adjustments, Testing: Switches p.32; Adjustments: Spill Switch p.42-43. 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.