Noma Thermostat vs Old Thermostat

diywoman · 01-04-2007, 11:08 AM

I have a Noma Programmable Thermostat with places for 4 wires to be connected. The Problem? I have "5" wires coming from the furnace that were all connected to the old thermostat. I was told I could wrap the #4 wire and not use, but that resulted in no-heat.

So obviously this wire needs to be connected, but I don't know to where or with what. I have a picture of the old set-up showing the wires labeled etc.
G-Green
RC-Red
W-White
Y-Orange
4-Black

Any help would be most appreciated.
Thanks in advanced!

DIYW

Christopher · 01-04-2007, 01:47 PM

DIYW,

This is considered to be a subject for the HVAC Forum not the Electrical Forum. You will catch the eye of relevant experts over there. The answer to your problem may be found in #CARRIERMAN's excellent post:

Facts about thermostats
Facts about thermostats

...Christopher

diywoman · 01-04-2007, 02:02 PM

Thanks, I'll wander over there!!