Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Remove gas valve impulse tube
Observation:
Visually inspect the impulse tube for general condition and blockages.
There are 2 types of gas valve for this boiler the impulse tube will differ depending on the gas valve but the test remains the same.
There are 2 types of gas valve for this boiler the impulse tube will differ depending on the gas valve but the test remains the same.
Isolate as per TOPs P4
and refit as necessary