What is meant by the term "2-stage heat 1 stage cool"? I am trying to select a programmable thermostat for my Carrier 38EYG048300 Comfort heat pump.
hvac1000
Jan 13, 2009, 01:08 PM
Heat
First stage heat pump
Second stage electric heat or gas/iol
Cooling
Just one outside unit is one stage unless it has two compressors which you probablt do not have.