Worcester Bosch Pressure Gauge 8737604417

The Worcester Bosch 8737604417 is a pressure gauge for Greenstar 1000 Series and Greenstar Gr1000W combi boilers. It provides the visual reading of the heating system water pressure at the boiler. The gauge is fitted as part of the boiler's hydraulic assembly and is read when checking or topping up system pressure.

• The needle stays at zero or does not move when the system is pressurised.
• The reading fluctuates or jumps rather than rising and falling smoothly.
• The dial face is clouded, cracked or the needle is bent or stuck.
• Water is weeping from the gauge body or its connection.
• The gauge reading does not match the pressure shown at the filling loop or external gauge.

• Confirm your boiler model against the fit list above.
• Check the part number on the existing gauge or in the manufacturer's parts list for your appliance.
• Verify the fault is with the gauge itself and not with the pressure sensor, filling loop or expansion vessel.