Medium
321 on ECA FELiS FL 50 HM

Your boiler is currently unable to monitor the temperature of your hot water properly, so it has safely shut down the hot water function to prevent overheating.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Book a service

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

What the manual says

Manufacturer manual

DHW output temperature, sensor error

From this model's manual
Verified against the Eca Felis Fl 50 Hm installation & service manual, page 62.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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