Had to replace the programmable thermostat. Instructions weren't clear to me as far as what jumper settings of on or off looked like.

Does "on" indicate placing the plastic piece over the jumper posts?

I have 5 wires, White, Yellow, Red (which was connected to RH, then had a piece of wire connecting RC to RH), Green and Blue. The blue one wasn't connected to the old thermostat.
I have Gas forced Air with heat and a separate AC unit that runs through the same vent system.
Thanks for any help.

What thermostat?
You did not tell us anything about the thermostat. Model/Name brand or should I get out my crystal ball and look around? LOL

Generally speaking, white is used as a common wire, green for fan, red for hot wire (hence the jumper between heat Rh and cool Rc), yellow for the condenser. On a combination unit like yours, I spliced the R to the condenser, bypassing the heat control board. This is done at the heater and not the t-stat. You will probably need to trace all the wires to get it wired in correctly. Maybe the manufacturer has an on-line tech support

I did not use the blue wire.

Incorrect wiring can damage the components. If you aren't sure, a tech might be the best way to go, unless hvac can walk you through it.

Good luck

Sorry, new to the site. I went from an Indiglo 3599 to Ritetemp 6036.

Connect all wires exactly as before. You do not need to connect the blue.

Yep, that's what I did. Turns out there was a blown fuse on the furnace, coincidentally. Once that was replaced, all was well.
Thanks.

Probably blew the fuse when wiring the stat. Glad you got it working.