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I will glad to help.Tell me what kind of unit you contols
Sorry had a customer called. One wire to R and one to W.
Is this a gas or electric furnace?
What thermostat are you replacing and do you know it is 24v controlled?
Yes as long as your unit is 24v controlled. What is model on old thermostat?
Are you replacing a thermostat?
Give me model on old and tell me where wires went on old
Are the wires small like about 18 gauge or thick like 12 gauge?
THat sounds like it may be line voltage.If so the thermostat will not work. Any numbers at all on old stat?
Do you have a volt meter to check ? I sure hate to burn the new thermostat up if it is high voltage wires. Can you attach a pic of old or where they connect at unit?
Would you like to continue later?