Ok...I decided to get a programmable thermostat...all the other ones I've wired in the past were easy...just match the exact wire colours to the corresponding lead.
My existing thermostat has a 5 wire system...
The new one has only 4 leads...
The instructions to install says "If you have 2 R wires (which I do...RH for heat and RC for air cond), then connect each wire to its corresponding terminal and remove the jumper" between the RH and RC terminals".
So, here's where I'm confused....
1) I do not see "corresponding terminals" on the new 4 lead thermostat.
2) The jumpers (see pic below) are not labelled RH and RC...they read RE and HG, which from the instructions say it's for electric or gas systems.
The instructions also say "depending on your system, you may need to connect 2 to 9 to the thermostat", but then do not tell you how to do that....
Any help would be appreciated! Thanks!