Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Remove & disconnect internal programmer/receiver assembly from the boiler (several types can be fitted)
CH demand from any external controls fitted, i.e. room stat etc
CH demand from any external controls fitted, i.e. room stat etc
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Observation:
With internal programmer/receiver disconnected, does the boiler light for a heating demand ?
Isolate as per TOPs P4
and refit as necessary