BoilerFaultCodesWhat the manual says
Manufacturer manualFault: Flow/return temperature sensor. Flow temperature sensor signalling constant value: Flow temperature sensor incorrectly positioned on supply pipe, flow temperature sensor defective
Shared across the ecoTEC plus range
This code is shared by the boilers in this range, which use the same control board. It may not be printed in this exact variant’s manual.
Engineer required
This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Related fault codes
All 72 fault codes on the ecoTEC plus 430
Seeing a different code? Every code this model can display, in one place.