What the manual says
Manufacturer manualIndicates if the boiler is receiving power and the thermostat is calling for heat.
From this model's manual
This code was read directly from the manufacturer service manual for this model.
DIY fix possible
Check that your room thermostat is set to a temperature higher than the current room temperatureEnsure your programmer or timer is set to an 'ON' periodCheck that the boiler temperature control knob is not turned to the 'OFF' position
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All 30 fault codes on the Solo PF
Seeing a different code? Every code this model can display, in one place.
Boiler OnBoiler On (Orange LED)Burner LED GreenBurner OnBurner On light offE01E03E24E26E26 186E26 219E26 221Fan OnFan/Flue LED GreenIndicator light inside box litLockoutLockout lightLockout light onOverheatOverheat (Red LED)Overheat indicator lightOverheat Neon IlluminationPeripheral / Pump LED GreenPilot OnPilot On lightPilot On light onPilot/Ignition LED GreenPower LED GreenPower On (Green LED)