The fan forces fresh air into a boilers combustion chamber, guaranteeing proper gas combustion and removing burned gas after combustion is complete. If the fan is not working properly, your boilers safety measures make sure that no gas gets through to the main burner.
Safety measures in place to stop gas being released through main burner
Technical specification
Manufacturer Model No1.010659Brand NameAlphaCompatible WithCD 24 C, CD 18 S and CD 24 S