Consequently, do I use RH or RC on Nest thermostat? When I removed the old thermostat, the wires were connected to W1, Rh and G. The Nest would not stay charged, so I read enough to realize I would need a common wire. Nest No Power To RH Wire. The RH wire (H for Heating) provides power to your HVAC heating. • If there’s a white wire in the connector labeled both W and O/B, ... Rc or Rh wire, you can put it into the R connector on the Nest Thermostat. If you are planning to replace your home thermostat, it will be essential that you know which wires to connect to the right terminals in your thermostat . Nest explains and we agree that you can simplify the electrical wiring by tossing un-needed jumper wires; for example, a wire labeled as "R" (usually this is a red wire) can be connected to either a terminal marked RC (red wire for cooling) or RH (red wire for heating). (Note: The RC and RH terminals are jumpered together in a four-wire heat/cool system and a single-stage heat pump system, but not in a five-wire heating/cooling system.) The exposed wire … Swapping wires in and out of the Nest base seemed to mess up the base, as the detection of the Rc and Rh was transient at best. If you have a W2, Y2 or O/B wire, you can put it into the * O/B connector, if needed. Smart homes have made a lot of advancements in order to bring comfort and ease to our lives. My old thermostat runs fine with just a W1(white wire) and Rh(red wire). I put the AC on late last night, it turned on and cool air was coming out. Rc and R are the same terminal. The Nest Thermostat E only has an R connector, which is typically where an R wire would go. Circuit to make Nest thermostat think there are … C wires are necessary for any “smart” thermostat that needs to be connected to a power source 24/7, regardless of your heat pump type. You just need to connect ‘red’ wire from furnace to Rh and ‘white’ wire to W1. So I opened the furnace, and connected the spare blue wire to the C terminal on the control board. Blue wires are also called “C” wires because they are the Common wire. I cannot get it to work. These devices of wonder have made our house smarter, safer, and much comforting than how it used to be. Furthermore, is Rh the same as R on thermostat? This morning, when I walked by nest, it had a Wiring Report message with E24 displayed...meaning no power to Rh wire detected. There were additional wires in the cable, but they were not hooked up at either end. In this regard, the Nest thermostat is a great device. These 2 connections will set the Nest thermostat as a ‘smart 2 wire thermostat’ taking care of your home heating ‘smartly’. For nest you don't need a jumper. The Nest 3rd Gen thermostat has 10 terminals, say Rh, Rc, W1,W2(aux) Y1, Y2, O/B, G, C, etc. In these cases, the signal wire from the heating system will be connected to R or Rh, while the signal wire from the cooling system will be connected to Rc. The RC wire (C for Cooling), if connected properly, controls your HVAC cooling. Do I need a jumper from R to RC? Here are some general guidelines: An R wire can go into a Nest Learning Thermostat's Rc or Rh connector. ="width:120px;height:240px;" marginwidth="0" … I am trying to put in a new NEST thermostast. The Rh wire connects to the RH terminal on your thermostat. I do have more wires … RH: The RH terminal is the 24-volt heating power supply. R, Rh, and Rc are all the same, but not. 1412My Nest Learning Thermostat, 3rd Generation, Works with Amazon Alexa has been working fine since installation 7 months ago. Put this wire in the Nest Thermostat’s * O/B connector. The Blue or “C” Wire.