Worcester Bosch Control Knob Stop Plate Ref 108 774 02 87168188710

This is a control knob stop plate manufactured by Worcester Bosch for use on Greenstar HE 12/22 ROO appliances. The stop plate sits behind the control knob and limits its travel, so the knob locates correctly against the fascia markings and cannot be turned past the intended range. It is a small but functional component of the boiler's user control assembly.

• The control knob turns freely past its normal end stops with no resistance.
• The knob no longer lines up with the markings on the fascia, making settings hard to read.
• The knob feels loose or wobbles because the stop plate behind it has broken or dropped out of position.
• The knob will not hold a selected position and slips back as soon as it is released.
• Visible cracking, distortion or missing sections on the plate when the knob is removed.

• Confirm the appliance model and serial number against the compatibility list, as the same knob design is used across several Worcester Bosch ranges.
• Compare the part number on the existing component with 87168188710, and check the previous numbers listed below in case an older plate is fitted.
• Inspect the knob and spindle at the same time; a worn knob can mimic a failed stop plate.