Heat Pumps and Electric Heating - Adding Heat Pump--HELP!

My dad sold a house in which he thought had a heat pump. 2 months later, the lady is complaining that it is not a heat pump, but an outdoor AC unit and an indoor gas furnace. She claims she bought an electric heat pump and is forcing him to provide a heat pump. She does not want gas.(I know all the arguments-but my dad is an honorable man and wants to make it right.) However since my father is elderly, that leaves this job up to me and my husband. :eek:
My question: Can a heat pump be added to the existing AC unit outside, or what is the easiest route to go? I don't know much about the options. Both the AC unit and the gas furnace are only 1 1/2 years old. Will we have to start from scratch since whe does not want anything gas? :confused:
PLEASE HELP! We would greatly appreciate any input anyone can give!

Well it may be less expensive to get another tennet.
A new heatpump would require a new indoor unit, a new outdoor unit, and a new bigger electrical service at the indoor unit.

You say he wants to make it good. SO sorry to say it all has to go. 1 1/2 old should be able to sell it or get a furnace company to take it in trade. For sure get 3 bids on this job. As you dont live there ask for the lowest SEER and HSPF that they have . Like said check the electric panel if its a 200 amp it might work for you . If notyou may have to put a new one in.
Good luck :eek:

ED ;)

I would say "Sorry but to the best of my knowlege that's what it had" She should of had it inspected anyway before purchase.