This is a BRAND NEW Trane/American Standard Heat Pump Defrost Control Circuit Board.  The Trane/Am Standard Part # is CNT05010 (also 21C140501G54).  Thanks for looking and good luck!

OEM Replacement for Old Part #s: CNT5004 CNT05004

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

2A6B3060A1000BA 2TWB3060A1000BA 4A6B4036E1000AA 4A6B4036E1000AB 4A6B4036E1000BA 4A6H5036E1000AA 4A6H5036E1000AB 4A6H5036E1000AC 4A6H5036E1000BA 4A6H6024E1000AA 4A6H6024E1000BA 4A6H6036E1000AA 4TWB4036E1000AA 4TWB4036E1000AB 4TWB4036E1000BA 4TWB4060E1000AA 4TWB4060E1000AB 4TWR5036E1000AA 4TWR5036E1000AB 4TWR5036E1000AC 4TWR5036E1000BA 4TWX4030B1000AA 4TWX4036B1000AA 4TWX4042B1000AA 4TWX4048B1000AA 4TWX4060B1000AA 4TWX6024E1000AA 4TWX6024E1000BA 4TWX6036E1000AA


On Mar-28-12 at 21:22:31 PDT, seller added the following information: