There are a few different types of modern boilers on
There are a few different types of modern boilers on the market, and deciding between them can be difficult. I would have thought if the continuity checks out on the gas valve, the engineer then tested the pcb? Even with a referral it is best to hire a plumber to do a simple, everyday maintenance task for you first so you can judge his or her work if you're happy with it, save their contact information so.