chook just keep an eye on him, try him again when the weather warms right up, some snakes still are not feeding at this time of the year. I have one male here that is still refusing a feed but he is in great condition, healthy and mating his little heart out.:lol:
I never use heat cords for older snakes, i only use them for hatchling tubs to sit on. lights IMO are the best heat source and way to keep a regular temp.