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radji  
#1 Posted : Wednesday, March 9, 2011 5:25:53 PM(UTC)
radji

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Our house has its original Gaffers & Sattler furnace (installed in the 1970's). I am replacing the old (original thermostat) with a digital one and have a dilemma. There are four wires strung together coming out of the furnace: Red, White, Blue, and Green. The old thermostat was broken off the wall when some furniture was moved down the hallway, so I don't know which wires were connected. Attached is a picture I found online of a thermostat that looks similar to the old one. The replacement is a Honeywell RTH111. It just needs to heat up and for the fan to work. Any help is appreciated.
Respectfully, Radji

ps: we've already had an HVAC technician out. He couldn't decipher the wiring and would not randomly jump wires to see what happened because the furnace is so old.
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icehouse  
#2 Posted : Saturday, March 12, 2011 12:20:04 PM(UTC)
icehouse

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Go by the color of the terminals not the wire colors. In other words a wire going to "G" on the old thermostat goes to "G" on the new thermostat regardless of color.
radji  
#3 Posted : Saturday, March 12, 2011 2:09:07 PM(UTC)
radji

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I don't know what wires went where on the old thermostat. We were moving a pool table down the hall and it clipped...or really ripped the old thermostat off the wall. I have no idea what wires went where since the old one is broken into about 5 pieces.
icehouse  
#4 Posted : Saturday, March 12, 2011 2:17:15 PM(UTC)
icehouse

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Trace them at the furnace and see where they go. Then post.
radji  
#5 Posted : Saturday, March 12, 2011 5:47:00 PM(UTC)
radji

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Here is a picture of how the wires go into the furnace and of the furnace itself. I can trace them farther than that but I need some instruction on just how to remove the front panel on the furnace in order to trace them. Do I just remove the two bolts at the top or does the side panel need to come off too? Thanks.
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2011-03-12 15.31.56.jpg (31kb) downloaded 20 time(s).

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icehouse  
#6 Posted : Saturday, March 12, 2011 7:15:15 PM(UTC)
icehouse

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Originally Posted by: radji Go to Quoted Post
Here is a picture of how the wires go into the furnace and of the furnace itself. I can trace them farther than that but I need some instruction on just how to remove the front panel on the furnace in order to trace them. Do I just remove the two bolts at the top or does the side panel need to come off too? Thanks.

The two bolts should do it. Can you provide the model #
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