Kind of like being a few fries short a happy meal or something.....I just purchased and installed a Hunter programmable thermostat from Lowes. It is the model specific for a heat pump--which I have. I followed the instructions to the letter, but I've run into a problem that's not covered in the instructions. There's no "L" wire in the bundle coming into my thermostat location. I even split the cover several inches farther back and still no L wire. Now that I've spend nearly $100 on this thing, without the L wire will it not switch from heat to cool automatically? Very frustrating! How do I correct this problem? I'm no HVAC tinkerer at all. Changing the thermostat is about as involved in HVAC as I get.....HELP!