_CL Low

Vokera _CL Fault Code

Also written as CL — same fault.

The Vokera _CL fault code means: your boiler has reached its programmed time for a routine annual service and is simply reminding you that a qualified professional should inspect and maintain it.. It appears on 3 Vokera models in our database.

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.

Technical description: CALL FOR SERVICE
Typical repair cost £90-140 (including labour)

Engineer required

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

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Vokera models that show the _CL fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Vokera _CL fault code information on this page is sourced and cross-checked against the official Vokera service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026