Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Remove air intake tube to gain access to flow thermistor
Observation:
Flow and return thermistors should be fitted as illustrated and mounted securely on the pipe.
Are the flow and return thermistors fitted correctly?
Are the flow and return thermistors fitted correctly?
Isolate as per TOPs P4
and refit as necessary