I have a 36 volt forklift that is equipped with transitorized drive controls. It is parked outside overnight. The problem is that when it gets colder than roughly 32 degrees F, The travel card "freezes" up and the truck won't go forward or reverse until the card warms up. I have also tried it with an identically equipped truck and it does the same thing. Does anyone know of a 36 volt strip heater that I could tape to the card's aluminum housing to keep it warm. The housing is roughly 5" x 7". Any advice including part #'s and installation instructions would be helpful.