Worcester Bosch Flow Thermostat 87161423090

The Worcester Bosch flow thermostat (part 87161423090) is a temperature-sensing component used in Worcester Bosch boilers. It monitors the flow temperature of the heating circuit and provides feedback to the boiler's control system, which adjusts the firing rate to maintain the desired temperature. This helps ensure safe and efficient operation, preventing overheating and improving overall system reliability. The part falls under the thermostats, thermistors and sensors category and is suitable for a range of Worcester Bosch appliances, including Boilerhouse and Danesmoor models. It is not a gas-carrying part.

• Boiler fails to reach or maintain the set temperature, leading to cold radiators or insufficient hot water.
• Heating or hot water output fluctuates unexpectedly, with temperature swings that are difficult to control.
• Boiler cycles on and off more frequently than normal, often accompanied by unusual noises.
• Error codes relating to temperature or flow are displayed on the boiler's control panel.
• The appliance locks out or fails to fire, requiring a reset that may only provide temporary relief.

• Check your boiler's model and serial number against the compatibility list to confirm fitment.
• Verify the part number on your existing thermostat matches 87161423090.
• Note that this part may also be listed under alternative numbers: 1018049, 8-716-142-360-0, 87161423600, ZAMAJ226, ZAMAJ239.