Medium
H.01 – .21 on Baxi Eco Compact

Your boiler is heating up too quickly when you turn on the hot water, likely because water isn't flowing through the system as fast as it should.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

Technical description

Temporary error – flow temperature increasing too fast in domestic hot water (DHW) mode, insufficient circulation or sensor error.

DIY fix possible

Ensure all internal stop taps and isolation valves are fully openCheck that your mains water pressure is normal and hasn't been interruptedTurn the hot water tap on and off slowly to see if the error clears itself

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Related fault codes

E20View →E40View →

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