Thanks for reminding me of my nightmare....
It began with an older 2 story house, ceiling heat, window air conditioners, lots of large single pane windows, and original batt insulation. With all that ...winter electric bill rarely went beyond $125 and summer electric hovered around $50-60 dollars.
Fast forward to our renovation plans: " Hey, lets get a heat pump" ...and the fun begins.
So we ask around, pick the one that seemed to have the best reputation for service, warranty and longevity...their slogan is " Nothing Runs Like A _____" (rhymes with "PAIN") coincidence?
Had extra insulation blown in during install too
During the summer when it was installed it ran fine, winter came and we notice heating bills are going up...$150, $175...service co. says unit is running fine, they just have to add 1-2 lbs of refrigerent every once in a while....(what the hell do I know, I don't work with HVAC). I chalk the higher bills up to leaky windows, poor insulation.
2nd summer: new roof w/ ridge & eave vents, all new energy efficient double pane windows, new siding w/ panel insulation underneath (R-1..but hey , every little bit helps), new water heater, insulated doors and seals.
When cold weather hits...electric bill goes to $300...WTF? Service Co. comes out , I'm steamin', they say there's a leak in the system. They pressure test and dye test but can't find shit.
Next month ....$350....I'm inventing new cuss words by now. I tell'em they better fix it pronto or I'll wrap a chain around the damn thing and drag it to the end of the driveway where they can pick it up..and I meant it.
Turns out the unit had a bad circuit board and was running on defrost full time....Plus after 2nd pressure and UV dye test , they found a pinhole leak in the inside coil...a factory defect. Thats why they had to add 6 more lbs of refrigerant on the last visit, and why the outside unit looked like one giant icecube....
Finally fixed, so far ..so good. Electric bill finally back down to $50-100 range.
If my meter starts spinnin' like a frizbee again...then they can change their slogan to " Nothing DRAGS like a ______"