Trane KIT9660 Conversion Kit R-410A When a vent blockage is

When a vent blockage is detected

failure of the valve to close fully (internal leakage)

compatibility depends on the thread pitch and stroke length

Applying 115V will result in failure to start or insufficient torque for the fan load

but it can be installed in any position within a properly sized duct provided the motor remains accessible for maintenance

Trane KIT9660 Conversion Kit R-410A When a vent blockage isThe Trane KIT9660 Conversion Kit is a critical OEM replacement engineered to modernize flame detection in legacy forced air systems. As the direct replacement for CNT1643, this radiant to flame sense conversion kit transitions aging furnace architectures from obsolete radiant sensing to contemporary flame ionization technology. This upgrade is foundational for technicians looking to resolve intermittent ignition failures and improve flame detection