My mother lives in southwestern Michigan. She recently had a Geo Thermal furnace installed. It ran continuously, after several visits from the contractor, they replaced the thermostat. It no longer runs constantly, however it takes hours for the house to warm up two degrees. It NEVER gets above 68 degrees even when it is set at 70. Her electric bill is higher than it has ever been. She has contacted the regional rep and he basically told her to deal with it. Her neighbor (who has a geo thermal furnace which has no problems) suggested that she get a gas furnace as a back up to heat the house. She has paid 14,000 + dollars for this furnace, she is cold all the time. She is 72 years old and health wise this stress is compromising her significantly. What can we do?