Pay in 4 interest-free payments of $27.13 Learn more
Ships within 48 hours · Estimated delivery Sep 14 - Sep 19
What if the capillary is too long
the A166 ensures optimal airflow in furnace draft induction and ventilation systems
When troubleshooting common heating failures
the technical logic and physical footprint remain compatible for direct replacement
This critical boiler replacement part features a 1-inch diameter and a length of 21-3/4 inches
Viessmann 7820148 Sensor 320788-704 What if the capillary isThe Viessmann 7820148 Sensor serves as the primary outdoor temperature sensor for weather responsive heating systems, enabling critical compensation logic for gas condensing boilers. Engineered for high accuracy ambient monitoring, this NTC thermistor ensures the Vitotronic 200 and 300 control units can dynamically adjust the heating curve based on real time meteorological data. By integrating this OEM replacement part, technicians can resolve common