Low
138 on Alpha E-Tec Plus NX

Your boiler is currently running a specialized drying programme for a new underfloor heating installation, which is a normal process and not a fault.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

What the manual says

Manufacturer manual

Screed heater in progress

From this model's manual
Verified against the Alpha E Tec Plus Nx installation & service manual, page 63.
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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