What 3 flashes means
The pilot sparks and may light for up to 60 seconds, but the main valve won't open: low gas supply, a false flame signal, or a shorted or disconnected sensor or igniter lead.
Also shown as: IPI 3 flashes, depending on the model.
Likely causes
- Low gas supply
- Sensor or igniter lead problem
Safe first checks
- Make sure the gas supply is fully on and, for propane, the tank has fuel.
When to stop
Lead and sensor checks are for a qualified tech.
Checked against: Hearth & Home Technologies, IntelliFire Plus troubleshooting guide. Codes can differ by model and year, so confirm with your owner's manual.