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NTI Ti100

I have a NTI Ti100 boiler just installed,(my third) and it worked great for 2 days although the fan only came on as the flame was going out. It is for infloor heat for the garage and will take about 3 days to get the floor to temp (it is still - 17 C here) Now the fan does not shut off, this does not let the air switch reset and gives "air switch closed"  ASC error code, removing the tube to the air intake and reinstalling it reset the switch and allows the boiler to refire but 4 minutes later same thing. Why or what is keeping the fan on????


  • unclejohn
    unclejohn Member Posts: 1,833
    Stuck Relay

    Maybe? But why is it only firing for 4 mins? Try shuting off the main power supply for about 10 mins and restarting. If that dosen't work call NTI.