Worcester Bosch Pump 8716117455

The Worcester Bosch 8716117455 is a circulation pump supplied by Worcester Bosch for use in Greenstar Highflow CDi ErP appliances. It moves water through the boiler's heating and domestic hot water circuit, maintaining flow through the heat exchanger and around the system. The pump is a serviceable component, so it can be replaced when flow, noise or performance problems point to pump failure rather than a system-wide fault.

• Heating or hot water output drops away, with radiators warming unevenly or not at all
• The pump becomes noisy in operation, with rumbling, humming or grinding audible from the casing
• The boiler locks out or overheats because water is not being circulated through the heat exchanger
• Flow and return temperature difference across the appliance is wider than expected
• The pump head runs hot, stalls or fails to start when the appliance calls for heat

• Check the appliance GC number and model plate against the compatibility list to confirm the pump suits your unit
• Note the alternative number 2244553 when cross-referencing an existing pump or an old invoice
• Inspect the pump seals and connections on removal and replace any worn washers or gaskets before refitting
• This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.