1. An auxiliary controller of a heating, ventilating and air conditioning (HVAC) system, comprising: an interface coupled to a main system controller of said HVAC system and configured to communicate therewith, said main system controller having main controller application information stored thereon; a processor, coupled to said interface and configured to direct the operation of an auxiliary component of said HVAC system; and a non-volatile memory configured to receive a copy of said main controller application information via said interface and store said main controller application information thereon.