Thermostat for Suburban Furnace - Removing Carrier Wireless

[TenOC]

Thermostat for Suburban Furnace after Removing Carrier Mark V

I need to replace my 2004 Carrier Mark V DUCTED Air Conditions that has a WIRELESS thermostat. The thermostat control the A/C as well as my Suburban SF30 furnace. I know that Coleman makes a Carrier to Coleman adapter to allow me to use the existing thermostat. With the age of the Carrier lower unit, I am think about replacing the upper and the lower unit. The problem is how to WIRE a thermostat to control the furnace.

I think (?) I have located two wire that run from the furnace to the circuit board on the A/C. They should be blue, but one is Pink the other is Green/White. They are connected to the 2 Blue wires that come off of the A/C control board.

There are also a Red and a White wire that goes to the A/C with I assume is the 12 VDC. Along with the large 110 VAC wires.

Question:

1. Is there any voltage on the thermostat wires that come from the furnace or is the thermostat a simple on/off switch?

2. Can I purchase a home thermostat (digital not antilog) and mount it?

3. Don't most (?) home thermostat use 24 VDC?

Any suggestion are welcome.

[Joe417]

Digital thermostats only open and close a relay to control the equipment. I think on mine I could measure 12V, but connecting the two wires from the furnace is all that's required.

I bought one of the simple digital thermostats from Lowes. Works great.

Most if not all digital thermostats today are battery powered so don't require power from the controlled unit. May have to put a battery in once a year.