Hi all, first post. I live in an apartment that uses an old, early 80's Lennox 2-stage heat pump. When using this in the winter, it NEVER shuts off. It will reach the desired temp,(the green indicator on the t-stat goes off)but it continues to run. I have to manually cut it off. Looks like the t-stat was changed to a newer unit(still with mercury switches though)
Any ideas? The electric bill is getting insane.