Isolate Mains Power to appliance as per TOPs P4
Observation:
Inspection 1:
Carefully remove sump plate below heat exchanger taking care to accommodate water that may be inside, check that the drain hole to the condensate trap is not blocked.
Inspection 2:
Inspect the heat exchanger flueways for restrictions/blockages
and for good general condition, pour water through and make sure
it drains via the sump and trap.
Note:
Before reassembly check the integrity of all disturbed
gaskets and seals and replace as necessary.
Carefully remove sump plate below heat exchanger taking care to accommodate water that may be inside, check that the drain hole to the condensate trap is not blocked.
Inspection 2:
Inspect the heat exchanger flueways for restrictions/blockages
and for good general condition, pour water through and make sure
it drains via the sump and trap.
Note:
Before reassembly check the integrity of all disturbed
gaskets and seals and replace as necessary.
Isolate as per TOPs P4
and refit as necessary