I have a Lennox system that was installed two years ago that has never seemed to be function as it should. The system consists of a heat pump with propane back up, but the propane runs 90% of the time even when temps are in the mid 50's. I suspect the outdoor sensor to be the problem, but am curious as to whether anyone has experienced similar difficulty.
Overall, I am happy with the Lennox quality, but seems like they totally blew it on the outdoor sensor. It is often inaccurate in excess of 30 degrees, so there is no way it is capable of detecting when the HP or propane should be running. I have disabled the outdoor sensor presently and it is much better and the HP has been doing a fine job of satisfying the stat.
Has Lennox improved on the outdoor sensor?