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Trying to wire RUUD gas furnace. connection block

Trying to wire RUUD gas furnace. connection block on furnace has 6 connections - Twin,Y,G,W,R & C. I have 5 wires from thermostat - Red,White,Green,Yellow & Blue. 2 wires to AC unit - Red & White. Can anyone tell me what connects where?

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  • rymelj Nov 14, 2009

    what about the blue coming from the thermostat, where does it go on the furnace?

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No problem have done this many times. R from the t-stat goes to R on the indoor unit. G goes to G Y goes to Y and C goes to C if you have a C or the t-stat the you are using. If there is no C there dont worry about it. It only need to be hookup if the t-stat uses power from the unit to run. Many t-stats today use battery power and do not need the C wire hooked up. Now R and C from the outdoor unit. R goes to the Y on the indoor unit and C goes to C on the indoor unit. That means that you may have two wires under the Y terminal and sometimes under the C terminal on the indoor unit. If on the outdoor unit there is no designation of R and C dont worry, just hook one wire to each of the two wires there for your low voltage connection. It does not matter which one goes to which unless they are marked then it may matter.
This should get you up and running and see it really isn't that hard!! :-)

Posted on Nov 14, 2009

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Hi, you're problem seems to be solved. The terminations are correct as he said above, as I have also done this many times. Thanks for using our team. Sincerely, Shastalaker7

Posted on Dec 06, 2009

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