I would have thought if the continuity checks out on the gas valve, the engineer then tested the pcb? Safety is paramount for ehc so the comet electric combi boiler comes with a high current thermal cut-out and other built in safety features. With a new energy efficient boiler? Nevertheless, you should still take a look at electric boiler prices even if they are not yet set in stone here are a few electric boiler makes and their prices. We offer -hour emergency service for major plumbing emergencies.