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check the fuse
long-lasting
Another good news: The replacement material is significantly cheaper than you might think
Heating the tank while it is empty is not permitted
Thermische Ablaufsicherung für Defro Heizkessel Pelletschlauch check the fuseThermal safety valve for Defro boilers Thermal safety valve for Defro boilers with integrated safety heat exchanger The thermal safety device protects your boiler from overheating in the event of a power outage or pump failure. The thermal safety device protects your boiler from overheating in the event of a power outage or pump failure. Product data: Connection: " internal thread Connection for immersion sleeve: " male thread Length of the capillary
