Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Remove the two white wires on terminals 3 and 4 of the integral timer and make safe
| WARNING! Mains voltage is expected during test, follow TOPs P4 live testing procedure |
Observation:
Does the Boiler still fire up with no demand?
Isolate as per TOPs P4
and refit as necessary