The Potterton 991186 Fan is a genuine replacement combustion airflow component designed for use in larger output boilers within the 51/72 kW and 60/80 kW ranges. This fan delivers the correct volume of air into the combustion chamber and efficiently expels flue gases through the flue system, supporting reliable ignition, stable combustion and consistent heat output even under heavier system demands. When the original fan becomes worn, noisy or begins to fail, symptoms such as delayed ignition, erratic performance or safety lockouts can occur, so fitting the correct OEM-specified fan is essential for restoring dependable and safe boiler operation.

This fan is compatible with Potterton boilers in the specified output ranges that reference part number 991186 in their parts documentation. To ensure proper fitment and reliable performance, always verify the part number on your existing fan or consult your boiler’s service information before installation, as combustion airflow components vary between models and configurations.

Supplied ready for direct replacement, the 991186 Fan integrates with the boiler’s original mounting points and electrical connections without modification when installed by a qualified engineer. Choosing this genuine Potterton component helps restore proper combustion airflow, improve ignition reliability and support consistent heating performance in compatible high-output boilers.