How much does it cost to fix Grant error code SERVO MOTOR BLOCKED?

Typical repair cost for the Grant SERVO MOTOR BLOCKED fault is £150-300 including labour.

SERVO MOTOR BLOCKED High

Grant SERVO MOTOR BLOCKED Fault Code

Q: What does the Grant SERVO MOTOR BLOCKED fault code mean?

Your boiler has stopped working because the mechanical part responsible for feeding fuel into the fire is stuck, likely due to a build-up of ash residue.

Also written as SERVOMOTORBLOCKED — same fault.

The Grant SERVO MOTOR BLOCKED fault code means: your boiler has stopped working because the mechanical part responsible for feeding fuel into the fire is stuck, likely due to a build-up of ash residue.. It appears on 1 Grant model in our database.

Technical description: Servo motor blocked is scrolling across the bottom of the burner control panel display. This may be caused by the brazier being blocked with ash/clinker.

Typical repair cost £150-300 (including labour)

Engineer required

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

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Grant models that show the SERVO MOTOR BLOCKED fault code

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

Spira Repair: £150-300

Source

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

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026