I would have thought if the continuity checks out on the gas valve, the engineer then tested the pcb? This is an effective way to make sure your sink remains unblocked, which you should repeat once a month this video shows you how. Have you reviewed this troubleshooting guide from the manufacture? For environmental and safety reasons, many people prefer to try clearing blocked drains with natural ingredients, before.
Added: 2020-05-12 | Comments: 0 | Category: one