The present disclosure is related to a sensor mounting assembly for a heating, ventilation, and/or air conditioning (HVAC) unit that includes a cover configured to couple to a panel of the HVAC unit and occlude an opening formed in the panel and a sensor support configured to couple to the cover and support a sensor coupled to the sensor support. The sensor support is also configured to extend into the HVAC unit via the opening in an installed configuration of the sensor mounting assembly.