Condition
Furnace Clicks but No Ignition
You hear the igniter click but the burner does not light. Igniter or gas supply.
Possible Causes
Cracked Furnace Igniter
Over time, the igniter becomes brittle and cracks, preventing the furnace from lighting.
Root Cause Analysis →Diagnostic Tests
- Visual inspection for cracks
- Ohm test
- Check for glow
Repair Options
Oxidized Flame Sensor
Soot buildup on the sensor causes it to lose its ability to detect the flame, shutting down the furnace.
Root Cause Analysis →Diagnostic Tests
- Inspect for oxidation
- Clean with steel wool
- Check microamp reading
Repair Options