How much does it cost to fix Potterton error code NO OR LOW WATER FLOW RATE?

Typical repair cost for the Potterton NO OR LOW WATER FLOW RATE fault is £120-250 including labour.

NO OR LOW WATER FLOW RATE High

Potterton NO OR LOW WATER FLOW RATE Fault Code

Q: What does the Potterton NO OR LOW WATER FLOW RATE fault code mean?

Your boiler is struggling to detect enough water flowing through it, which is preventing your hot water from working correctly.

Also written as NOORLOWWATERFLOWRATE — same fault.

The Potterton NO OR LOW WATER FLOW RATE fault code means: your boiler is struggling to detect enough water flowing through it, which is preventing your hot water from working correctly.. It appears on 1 Potterton model in our database.

Technical description: 1. Blocked water filter. 2. Heat exchanger blocked with lime. 3. Loss of service water main pressure.

Typical repair cost £120-250 (including labour)

Engineer required

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

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Potterton models that show the NO OR LOW WATER FLOW RATE fault code

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

Main Mersey Super Repair: £120-250

Source

Potterton NO OR LOW WATER FLOW RATE fault code information on this page is sourced and cross-checked against the official Potterton service / installation manuals for each affected model.

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