Eberspacher Hydronic S3 HS3 D5E D4E Combi Flame Overheat Sensor | 252652990102

The Eberspacher Hydronic S3 HS3 D5E D4E flame and overheat combination sensor is a genuine repair part designed to restore reliable flame detection and protection in Hydronic heaters. Compatible with D4E, D5E, B4E, B5E, and D5L models in 12V or 24V configurations, this sensor helps prevent cold air timeouts and flame sensor interruptions. It supports fault codes P00010A, P000120, P000121 and is supplied with factory warranty. Ideal for maintenance and repair projects, it’s suitable for both 12V CL and 24V CS systems. Check the included model list for exact compatibility and ensure correct installation to restore safe ignition, efficient combustion, and reliable operation of your vehicle heater.