I purchased this t-stat last winter:
formatting link
worked good for my heating system. But I recently turned on my CAC for the first time and noticed a wierd problem. The T-stat has a built in compressor protection feature. It waits 5 minutes before starting the compressor if the T-stat cycles too quickly. Which is fine only theres one problem: When I tested it out, the compressor came back on, but the blower motor stopped working, as if the 2 had been reversed. I double checked the T-Stat wiring and it is good. According to my Trane furnace schematic, the compressor relay is hooked up to y and c terminals on the furnace circuit board, which they are. A point to note, there is no C terminal on this T-stat. The manual says " Do not connect the c wire, you will not use it". Also there is an R and RC terminal on the T-stat jumped together. The manual says to leave the jumper connected if all I have is an R terminal on the furnace. I plan to call Honeywell for support, but does anyone have any input what might be wrong?