I have been very unhappy with the performance of my Frigidaire Heat pump.(model FT4bd-036k and model B5VM-936k-B) My old heat pump was over 20 years old when it failed. My new Frigidaire was suppose to be 4 times more efficient being a seer 13. The first summer my light bill over doubled even after raising the thermostat to 78. ( I used to keep it at 68) The same thing in the winter. In the past 15 years at this house my electric bill never was higher than 150 dollars, and that was keeping the thermostat at 70. How with the thermostatic set at... read full review »