Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Isolate cold mains input into the boiler
Remove dhw flow switch assembly from boiler
Ensure precautions are taken against water loss from pipe work
Remove dhw flow switch assembly from boiler
Ensure precautions are taken against water loss from pipe work
Observation:
Inspect the flow switch assembly for any blockages and its overall condition?
Isolate as per TOPs P4
and refit as necessary