I would have thought if the continuity checks out on the gas valve, the engineer then tested the pcb? Great customer service, always willing to assist, thorough, professional why would you use any other plumbing company?!? :)”. If you can't get your drain unclogged, a drain snake will help you remove any debris blocking the flow of water these are dirt cheap and you may be able to avoid calling a plumber! To contact us, either call or fill in our simple contact.