Water flow switch for sgb 90-250 De Dietrich JJX000937122

The water flow switch for SGB 90-250 boilers monitors water circulation through the heat exchanger and prevents burner operation if flow is insufficient. This safety device protects against overheating and damage due to pump failure or air locks. If your boiler displays flow-related error codes or short cycles, the flow switch may be stuck or faulty. This replacement part is calibrated for SGB 90-250 models, ensuring accurate flow detection and reliable system protection. Essential for maintaining safe and efficient heating.