I recently installed a new Honeywell programmable thermostat. After installing it I was reviewing the user manual which contains a somewhat cryptic warning along the following lines:
Since they give no reasoning and it is a generic thermostat that can work with many kinds of systems I'm not sure if the warning is even relevant to our gas heat + central AC system. This leaves a few questions that I hope you folks can address:To avoid possible compressor damage do not use automatic switchover mode when outside temperatures are below 50 degrees.
Does running the AC at low outside temperatures cause potential compressor damage? If so what is the mechanism of that damage?
If running the AC at low outside temperatures can cause system damage, it seems like there should be an interlock to prevent that. It is a Goodman that is around 10 years old. I can get the exact model number off the unit tonight if that helps you folks know if an interlock is already present (if it isn't already present I guess we better add one because my wife and I really like having the thermostst in auto switchover mode in the spring and fall).