Baxi Duo Tec Fault Finding Guide Domestic Hot Water Diagnostics This guide provides a structured fault-finding process for diagnosing issues associated with the domestic hot water (DHW) service on the Baxi Duo-tec Combi boiler range. It covers electrical faults, error codes, and component-level diagnostics for parts like the pump, PCB, gas valve, and various sensors. … Continue reading Baxi Duo Tec Fault Finding