This is a BRAND NEW Trane/American Standard Heat Pump Defrost Control Circuit Board.  The Trane/Am Standard Part # is CNT05482, or 21C140501G55.  Thanks for looking and good luck!

OEM Replacement for Old Part #s:

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Partial List of Trane/American Standard Units that use this Item:

4A6B3042B1000AA 4A6B3048B1000AA 4A6B3060B1000AA 4A6B4042E1000AA 4A6B4042E1000AB 4A6B4048E1000AA 4A6B4048E1000AB 4A6B4049E1000BA 4A6B4060E1000AA 4A6B4060E1000AB 4A6H3042B1000AA 4A6H3042B1000AB 4A6H3048B1000AA 4A6H3048B1000AB 4A6H3060B1000AA 4A6H3060B1000AB 4A6H5042E1000AA 4A6H5042E1000AB 4A6H5048E1000AA 4A6H5048E1000AB 4A6H5049E1000BA 4A6H5060E1000AA 4A6H5060E1000AB 4A6H6048E1000BA 4TWB3042B1000AA 4TWB3048B1000AA 4TWB3060B1000AA 4TWB4042E1000AA 4TWB4042E1000AB 4TWB4048E1000AA 4TWB4048E1000AB 4TWB4049E1000BA 4TWR3042B1000AA 4TWR3042B1000AB 4TWR3048B1000AA 4TWR3048B1000AB 4TWR3060B1000AA 4TWR3060B1000AB 4TWR5042E1000AA 4TWR5042E1000AB 4TWR5048E1000AA 4TWR5048E1000AB 4TWR5049E1000BA 4TWR5060E1000AA 4TWR5060E1000AB 4TWX5042A1000BA 4TWX5049E1000BA 4TWX6048E1000BA


On Mar-28-12 at 17:50:23 PDT, seller added the following information: