Isolate Mains Power to appliance as per TOPs P4
Turn off DHW supply at the inlet
Turn off DHW supply at the inlet
Observation:
Remove and check flow switch regulator for blockages and damage.
Note:
Flow switch regulator is located on the outlet of the flow switch, which is connected to the secondary heat exchanger.
Note:
Flow switch regulator is located on the outlet of the flow switch, which is connected to the secondary heat exchanger.
Isolate as per TOPs P4
and refit as necessary