1. Either the optional manual reset low gas pressure switch or the optional manual reset high gas pressure switch tripped.
2. The gas pressure switch contacts on the Low Voltage Connection Board are open.
1. - Reset the pressure switches.
- Measure the supply gas pressure to determine cause of failure. Natural gas pressures should be between 4 - 14 inches w.c. and LP gas pressures should be between 8 - 14 inches w.c.
- Correct the supply gas pressure if necessary.
- Check for a loose or misplaced jumper if pressure switches are not installed.
2. Check for a loose or misplaced jumper on the Low Voltage Connection Board.
- Check for the addition of a device wired across the gas pressure switch terminals on the Low Voltage Connection Board.
