InstroTek, Inc.

Low lift test (lift should be between -3 and -8)

  • Check the blower fan is running and relatively quiet.  If the fan needs to be replaced, PN NC-1500 (1087/1275) or NC-1520 (859/945)
  • Clean the upper section of the NCAT furnace as described in the maintenance section
  • Verify the door is closing correctly.  See “Door Loose” section
  • Check the filter temperature as described in the “Long Burns” section
  • Verify there are no obstructions in the exhaust tube