Problem Possible causes Solution
The boiler is not working.
The temperature set point for the heating
is too low.
Increase the value with the CH temperature knob
or if a room thermostat is connected, increase the
temperature on the room thermostat.
No demand for heating. Ensure that timers & thermostats are calling for
heat.
No power supply. Check that the boiler is being supplied with power.
Check the fuses and switches.
The water pressure is too low (< 0.5 bar). Re-pressurise the system.
The boiler is indicating an error. Press the Reset button.
Correct the error, if possible.
The gas pressure is too low. Check whether the gas isolation cock is fully open.
Open the gas isolation cock.
Condensate drain blocked. Check drain, especially any external runs in freez
ing temperatures.
If the boiler is not working also check section "Operation checking proce
dure and basic fault identification" or contact your Installer.
8 Troubleshooting
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