Working on older Lennox RTU where the blower runs all the time when it should not, unit controlled by 20vdc stat. Struggled with this unit for a while today, came down to finding a cmc2 blower delay timer motor that does turn. I dont have any real experience with these rtus(dc to ac using logic panel) Is this cmc2 a part still found? and I was wondering if not, what could I do to control the blower. Also anouther RTU same model, jumps out but stat does not seem to work(20v dc stat, where you slide the temp desired like a light dimmer with no fan control) Are these style stat available are is there a way to use a so called conventional stat?