The Viessmann 7835112 Temperature Pressure Sensor is a monitoring component designed to measure operating conditions within compatible heating systems. It detects temperature and pressure changes and provides corresponding signals to the boiler’s control system, helping regulate operation and identify abnormal conditions. Used in compatible Viessmann boilers and heating equipment, thi... https://www.partshnc.com/7835112-viessmann-temprature-sensor-3-boiler-set-2