Broag Outside Sensor AF60 7843657

The Outside Sensor AF60 is an external temperature sensor manufactured by Broag for use with Broag commercial boiler installations. It measures outdoor air temperature and feeds that reading back to the boiler's control system so the appliance can modulate its output in line with weather compensation. It is supplied under Broag part number 7843657.

• The boiler no longer responds to changes in outdoor temperature and holds a fixed flow temperature.
• Weather compensation behaves erratically, with flow temperature swinging without a corresponding change in conditions.
• The control display shows an outdoor sensor fault or the sensor reading is missing.
• Heating output is consistently too high or too low for the prevailing outdoor conditions.
• The sensor housing or cable shows physical damage, water ingress or corrosion at the connection point.

• Confirm the boiler model and that it uses the AF60 outside sensor.
• Check the existing sensor's part number against 7843657.
• Inspect the mounting position and cable run so the replacement can be fitted in the same location.
• Verify the fault lies with the sensor rather than the wiring or control board before ordering.