Thursday, September 15, 2011

Changing a two wire thermostat to a new digital one?

I have a thermostat that I wish to upgrade to a digital one. The digital one has a Y, G, Rh, Rc, W. I only have two wire coming out of the wall (green and black). The house has gas for heating.



Any idea on what wires go where? I presume the green goes with the G, but where does the black wire go?
Changing a two wire thermostat to a new digital one?
Don't presume! The instructions that come with your digital thermostat should have had directions for two wire also. No matter.

1.The Green wire goes to W

2.The Black wire goes to RH

3.Put a small jumper wire from RH to RC (Cut the insulation off the ends of a small piece of wire. Most of the time it's provided, by being in place already)



Edit: Tips.

1.Make sure you get rid of that old thermostat. If it's one of the old type that has a bubble in it with a silvery looking blob, that silvery looking blob is MERCURY. Should that vial (Bubble) be broken, and come into contact with humans it can be lethal. If ingested, Bye-Bye! If it gets into a sore or a cut, IMMEDIATELY SEEK MEDICAL ATTENTION!

I came back, because you may have children in your household, and children are curious. Also for your safety.

I know this may be going a bit overboard, but I wanted to cover the 'just in case'



I worked at a vinyl siding manufacturing plant in Texas. (Many moons ago) A gentleman in Recieving and Shipping, didn't show up one day. I ran a twin screw extruder that makes the vinyl siding. First thing in the morning, several of us employees would gather outside before work, and smoke a cigarette. This person didn't show up,and I inquired where he was. After he had gotten off of work the previous day, he had replaced a mirror in his house. The mirror was broken. (Medicine chest) Some of the mirror's broken pieces had fallen to the floor. He carefully picked them up by bare hand, and placed them in a dustpan. One of the pieces made a tiny, tiny puncture on a finger. He woke up about 4 in the morning, with his arm feeling like it was on fire, and a small red streak going up one vein. (Artery? Dunno'!) He thought, hmmm, looks like I have a small case of blood poisoning. He went to the doctor, and they found it had proceeded to the point that to stop it, they had to REMOVE his ARM, ALL THE WAY UP TO THE SHOULDER!!



2.Push the HOLD button, after you have set the thermostat, to the desired temp for the first time. I was lazy the first time, and didn't program the thermostat. I woke up the next morning EARLY! The thermostat had gone back to the factory default setting, and this was 62 DEGREES! lol!