Worcester Bosch Pump Head UPMO 7M CHG 8716120411

The Worcester Bosch 8716120411 is a circulating pump head, supplied in the UPMO 7M CHG variant. It is the motor and impeller section of the pump assembly and provides the circulation that moves water around the primary circuit of the appliance.

It is used across the Worcester Bosch Greenstar range, where it maintains flow through the heat exchanger and out to the heating and hot water circuits. Loss of circulation affects both central heating and domestic hot water performance.

• The appliance fires and runs, but radiators stay cold or heat unevenly across the property.
• The pump is noisy in operation, hums continuously, or runs hot to the touch.
• Circulation-related lockouts or fault codes appear, particularly after the appliance has been running for a period.
• Domestic hot water temperature becomes erratic, or the appliance cycles more frequently than normal.
• The pump head is silent when the appliance is calling for heat, indicating the motor is not turning.

• Check the GC number and appliance serial plate to confirm the model before ordering.
• Compare the part number on the existing pump head against the previous numbers listed below to confirm it is the correct replacement.
• Check whether a gasket or seal kit is needed for the joint between the pump head and the pump body.
• This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.