Our programmable thermostat started acting up, turning the heat on at the wrong times, and the homeowner before us didn't leave any paperwork behind. The model number was tiny and hard to read on the Lux device itself. I tried a few universal thermostat guides, but the wiring for our old system was different. I finally tracked down the exact specifications I needed. I highly recommend locating your specific lux thermostat manual by visiting
lux-products.manymanuals.com/thermostats, because I found the precise wiring diagram and programming sequence for my model, which fixed the scheduling problem in minutes.