Worcester Bosch Thermostat Pocket 87161053600

The Worcester Bosch thermostat pocket (87161053600) is the sleeve that holds the thermostat sensor in position against the appliance's water circuit. Keeping the probe seated and in close contact with the water allows the thermostat to read temperature accurately and control firing. It is a Worcester Bosch spare used across the Boilerhouse and Danesmoor appliance families.

• The thermostat or sensor reports a temperature that does not match the actual flow or return temperature.
• The appliance short-cycles, overfires or fails to hold the set temperature.
• The sensor probe sits loose in the pocket instead of being held firmly in contact with the pocket wall.
• Water weeps from the joint where the pocket seats into the housing.
• Repeated overheat lockouts that clear once the appliance cools.

• Confirm the appliance model and serial number against the compatibility list; this pocket is shared across Boilerhouse and Danesmoor variants.
• Inspect the seal at the pocket joint and renew it if it is damaged before refitting.
• The part is not classified as a gas-carrying component.