Low
SL on Ideal ESPRIT ECO2

Your boiler is currently running a safety check or operating normally, but if this code stays on and your heating stops working, it simply means the system needs a reset.

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

System status/fault mode indicator

Shared across the Esprit ECO2 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.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

DIY fix possible

Check the boiler display to see if the code clears on its own after the current cycle finishesTurn the boiler off and on again using the main power switch or reset buttonCheck your programmer or thermostat settings to ensure a call for heat is active

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Related fault codes

SHView →F1View →F2View →

All 26 fault codes on the ESPRIT ECO2

Seeing a different code? Every code this model can display, in one place.

DUF[-]F1F2 Or Fn Or LnF3F6F7F8 or L8F8/L8F9F9 or L9F9/L9FAFUL[-]L1L2L4 Or F4L5 Or F5L6LCoFSHUFuP

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