10
Fault Potential Corrective Actions
Central Heating will not
switch on
Check that the timer tappets are set to the outer edge of the dial.
Rotate the room thermostat knob until the set point is 30ºC.
Check that the power to the boiler is switched on.
Check that the “Mode” knob on the front of the boiler is in the winter
position.
Check that the link wire in the incoming mains connection to the boiler
is in place across the room stat connections (see boiler installation
instructions).
Check that the Timer On/Timed/Off switch is on (or the unit is timed on)
Stand next to the boiler holding the room thermostat for 5 mins. If the
central heating switches on then the room thermostat was either too far
away from the boiler or there were unsuitable materials between the
boiler and the room thermostat. Re-position room thermostat.
Change the batteries in the room thermostat.
Replace both the RF Timer and the RF Room Thermostat for a new pair.
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