Product review (1 stars): After second stage heating was satisfied. it would kick down to first stage
Item returned.  Worked for one day.  After second stage heating was satisfied. it would kick down to first stage, but not shut down, just continue to run, woke up in the middle of the night to my house heated up to 80 degrees.  replaced with an Emerson.  An example of where a cheap part is not worth it.