A/C Programmer -J127-

WARNING: This page is about a different car, the 2015 Volkswagen Passat, 2014 Volkswagen Passat, 2013 Volkswagen Passat, and 2012 Volkswagen Passat. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying A/C Programmer

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

This programmer switches the refrigerant flow direction through the second evaporator if the temperature on the cooling fins on the second evaporator lowers to the freezing point for water (icing protection).