Baxi E13 Fault Code

What causes the Baxi E13 fault?

This fault occurs when the boiler's internal temperature reaches a critically high level, causing a safety fuse to blow and permanently cut the power to prevent a fire or explosion. It is usually caused by a severe lack of water circulation, a major blockage in the heat exchanger, or a complete failure of the internal pump. Unlike a standard overheat, this fuse is a one-time safety component that cannot be reset electronically.