I see. I guess it doesn't get crazy cold down here, we've had a few days when the temps went below 0°F this year I think but it didn't last very long. Still, it seems like we've had a few nights when the old thermostat was set at 70°F and the temp wouldn't go above 65°F. I figured it might have been too cold outside for the heat pump to achieve 70°F but maybe the thermostat was messed up. Or maybe the vents are too dirty. Seems like I almost always feel lukewarm air at best coming out of the vents... but when the home inspector came he measured temps in and out and they were OK. Plus usually the heater seems to work... bah...
Picked
this one up today and installed it. It was really easy. Until I noticed that the wire which connected to the "E" on the old thermostat had nowhere to go on the new one. Called the customer support at Lux, but it was 5 pm and they close at 4:30. Fail... did a bit of research and it seems like it's for the emergency heat. There's truly no connector for it on the new one, it's bizarre, I checked the wiring for my heat pump, and for all the other styles for that matter, there's no "emergency heat" anywhere. I have everything connected where it should be except that one. I'm a bit dumbfounded since I don't know much about those things. There is an "auxiliary heat" on the wiring that was already connected in the old one ("W2"), and apparently that's what's used for emergency heat according to the manual:
Emergency Heat mode will prevent the first stage of your heat pump system from turning on, and use only the “W2” second stage heat terminal (Auxiliary Heat) as the primary heating source. It may become too cold in some climates for a heat pump alone to provide adequate heating without a secondary heating device. As every heat pump has different operating characteristics, you should refer to your heat pump manufacturer's recommendations for when to disable the heat pump and run in Emergency Heat mode.
Anyway... I emailed them and we'll see what they say. Everything seems to be running great without this wire (I just taped the end). It's pretty neat, and it's really dirt cheap, I'm glad I finally got one. I also got a mean splitter while I was at it, and a few CFL bulbs. The kitchen bulbs especially were pretty high wattage...
Now my next goal is to add some insulation to the garage door. Since the garage is below our living room I feel that we probably lose quite a bit of energy that way. And next might be adding insulation to the roof.
Guess what? I got a fever! And the only prescription.. is more cowbell!