PROBLEM: Boiler Produces No Heat
Possible Causes
- Boiler has no power
- Water level is low
- Pilot or electronic burner ignition malfunction
- Thermostat malfunction
- Circuit breaker or fuse controlling the furnace is tripped or blown. Reset tripped circuit breaker. Replace blown fuse.
- Maintain water level at half full. The boiler's automatic filling system using the pressure relief valve should maintain proper water level by maintaining a 12-15 psi pressure. If you do not have a pressure reducing valve you can also manually feed the boiler by oping up the water feed valve until boiler pressure reaches 12 psi.
- Natural gas or propane control valve to boiler burner is closed.
- Pilot light is out. Relight standing pilot.
- Troubleshoot electronic ignition system if boiler has no standing pilot.
- Check that thermostat is in heat mode and has appropriate temperature setting.
- Try moving thermostat setting for temperature up or down a few degrees.
- Troubleshoot thermostat.
