Honeywell 107324A Duct Mount Bulb & Capillary Holder

The Honeywell 107324A is a duct mount bulb and capillary holder used to secure a temperature sensing bulb inside ductwork for accurate readings by connected thermostats and control systems. It is intended for residential and light commercial HVAC applications and mounts directly to the duct wall, holding the capillary bulb in position so temperature data reaches the controller reliably. As an OEM replacement part, it restores proper sensor positioning when the original holder has failed or gone missing. This holder is a direct OEM replacement for Honeywell systems using duct-mounted capillary bulbs, and installation is DIY-friendly for technicians familiar with basic duct-mount hardware. Replacing a worn or missing holder addresses symptoms such as the thermostat not reading temperature, inaccurate temperature sensing, control system malfunction, or improper heating and cooling response. No hazardous materials are involved, and no EPA Section 608 certification is required to install this component.