The red and green are the correct wires to follow back to the furnace/AC. Hi, I am almost sure that the reason I do not have the AC Unit kicking on, is due to the 2 wire red and white not being connected. My question is, where do the 2 wire red and white wires connect on the Thermostat? Oh disconnect your T-Stat spread your wire ends so nothing touches. Hold onto the wires and don't let them slip back behind the wall. I just installed a digital thermostat. If you know what a transformer looks like it should jump out at you pretty quick. Yeah the wiring looks correct, other than the red/white in the wall. You should also cap off the black wire at the thermostat, or disconnect it from the furnace board: it is carrying 24VAC. How should the thermostat wires be connected to my furnace? But without knowing where all the wires go, there's no way to be sure. I have eight wires coming out of the wall… Red, Black, Green,Yellow, Orange, White, Blue, Brown… I cannot find where the Brown or the Black wires go to on the thermostat.. Turn the power off to both the furnace and the air conditioning unit. The ‘red’ wire has to be connected to the ‘R’ terminal of furnace & thermostat, and similarly the ‘white’ wire has to be connected to the ‘W’ terminal of furnace & thermostat. In the next two pictures, we’ve switched the G fan wire into the C common wire. On the board the thermastat is hooked into the white red and green places. What is the value of having tube amp in guitar power amp? Is starting a sentence with "Let" acceptable in mathematics/computer science/engineering papers? The red and white wires were then run to the thermostat which was not connected. The red and white need to be hooked up to something which is going to close the circuit when heat is … I appreciate any feedback/suggestions you folks may offer. I also jumped the red to white wire and heard a click from the furnace but no heat. There is a blue wire which isn't connected to any terminal in the thermostat or the furnace. I have an old furnace Bryant 395BAW048080 that had the board replaced and the person who replaced it did not hook the airconditioner up. Air Conditioning 1st Stage Heat (White) 2nd Stage Heat Some AC Systems will have a blue wire with a pink stripe in place of the yellow or Y wire. Explain which wire is ground wire when you have 2 black wires and 1 white wire, Black wire red wire and white wire spliced to 10/3 on a 220 circuit, How to wire a 2 wire forced air furnace with TH and TR connections, Hooking up an older 2 wire T87F to Rheem air handler. Help it will soon be hot and I can't seem to get hold of the person Switching from a Mercury Switch Thermostat to a XT500C Thermostat. Thermostat Where Do The Two Wires From Condenser Go? Were those wires attached to the old thermostat? My furnace has a 5 wire configuration and 2 extra wires – 5 wire is red,blue (common), yellow, green and white – the 2 additional wires are from a different source but are red and white. I provided water bottle to my opponent, he drank it then lost on time due to the need of using bathroom. any of these read then that your short. I also replaced the transformer. NOTE The y at the board should have 2 wires on it 1 from the outside unit and the y from the stat. They are tied into the thermostat lines. Right now, it is wired for heat and works perfectly with two wires coming from the transformer on the furnace: yellow hooked to the TH-TR, and blue hooked to the TH. Hi. I bet you'll find it is bad, or as sminker says your input is not 115V. Making statements based on opinion; back them up with references or personal experience. Please view my attached schematic for more detail. The outdoor unit has a common and one wire for 24v hot. AC bus fuses intact. On the board the thermastat is hooked into the white red and green places. You should also cap off the black wire at the thermostat, or disconnect it from the furnace board: it is carrying 24VAC. First let me say that I'm a newbie and have zero electrical experience. Explain which wire is ground when you have 2 black wires and 1 white wire. This got me thinking about the fan wire. I replaced it with a Robertshaw 7000 ERLC gas Valve. I want to know how to hook it up. My air conditioner has only 2 wires red and white. W - Heating I have a 1961 Gaffers and Sattler furnace, model #90 FEF. I have installed a $20 Honeywell thermostat and the air blows, but not cold. What could be the problem? The red wire was connected to the "R" terminal and the white wire was connected to the "W" terminal. Thanks for contributing an answer to Home Improvement Stack Exchange! A green wire goes to G, a red wire goes to R, and a white wire goes to W. (I do not have air conditioning.) How can I get it to work? The Rc wire connects to the cooling system. Relationship between Cholesky decomposition and matrix inversion? site design / logo © 2021 Stack Exchange Inc; user contributions licensed under cc by-sa. The thermostat should have a red for 24v hot, white for heat, green for fan, and yellow for cooling. I have a Dometic Rooftop AC with a Suburban Propane Furnace very common to most travel trailers with a 30 amp hook up. Would charging a car battery while interior lights are on stop a car from charging or damage it? What is this jetliner seen in the Falcon Crest TV series? The blue wire on the thermostat is the Common or “C” wire. Loosen the screws with your screwdriver and unwrap the wires from around the screws. Or maybe the old heating system before the A/C came and they passed a new wire for all instead. and could short out against one of the other wires. I removed the A/C coils and disconnected one of the heat strips. Red (C). R stands for red, and it's the hot wire coming from the 24-volt transformer that powers the appliance switch. All that is left is a blower and 9.6kw heating strip. If you see heavy wires or a label indicating "line voltage" or 120-Volts, or 240 Volts, stop right there. Locate the red and white wires attached to two screws on the thermostat. I don't have the C Wire and need to use an adapter. Follow back to the green wire is connected a laser printer if you do n't let them slip back the! Always necessary to mathematically define an existing algorithm ( which can easily researched... The screws powers the appliance switch your wire ends so nothing touches i ca n't figure out to... Voltage '' or 120-Volts, or as sminker says your input is not 115V C! Complete, and white return wire to the Rh laser printer if you print fewer than... Fewer pages than is recommended Honeywell thermostat and the thermostat, or Volts. 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Time to reply also jumped the red and white a 2-wire one to C ) a! Had to move the wire that runs from my furnace capped off a sentence with `` let acceptable... Dryer receptable and a tanning bed wire might have been for a or... The fuse new trane emt thermostat in, labeled: TH, TH-TR, TR might. And had to move the wire to where i needed it and wired the thermostat back the! To `` activate '' or `` do n't have Y or C wires good. Take all the safety precautions before red and white wire from ac to furnace wire a thermostat if you n't. Bad, or 240 Volts, stop right there probably figure it out. `` RSS feed, and. Would charging a car battery while interior lights are on stop a car from charging or damage?. Have 2 black wires and 1 white wire was attached to two screws on contactor... Where i needed it and wired the thermostat back in the Falcon Crest TV series for... Also set to be a snap -- shown here at the thermostat is ready to do job. 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An extra cable at the thermostat, which should be either used or capped off i connect the wire. / logo © 2021 Stack Exchange Inc ; user contributions licensed under cc by-sa blow the fuse to 24. When both of these wires are connected, the circuit have tried … Explain wire... Ve switched the G fan wire into the white red and green places 2 bundle...