IF this thing does die, is there a better unit to replace it with?
It has the AC unit which works OK.

I hate the unit being one the outside because lots of energy is wasted (for $1 energy spent I get about 70 cents of heat in the house)... duct work under the house, heat going up in the air. Although I like the circulating system, there has got to be a better one that is indoors.
All of the registers are in the floors.

Price for replacing the unit?? Can there be a replacement for the heater portion only?