termopar acumulador vaillant 171189 blue air Reference: M0006453

Reference: M0006453

HBA21B260J/03 BSH

or the refrigerator does not start

check the equipment’s specification plate or contact Electrotodo for advice

termopar acumulador vaillant 171189 blue air Reference: M0006453The thermocouple is a fundamental safety component in Vaillant storage boilers. Its main function is to detect the pilot flame and allow the gas to flow while it remains lit, ensuring the safe operation of the heating or hot water system. If the thermocouple fails, the boiler shuts off to prevent gas leaks. What problem does this replacement part solve? The boiler does not keep the pilot flame lit. The burner constantly shuts off during operation.