Help Please: Blue Wire = Common Wire? - DoItYourself.com
2009年10月10日 · Thermostatic Controls - Help Please: Blue Wire = Common Wire? - My current thermostat has 4 wires hooked up: one to Y, one wire to G, one wire to W, and one wire to RH with a jumper between RH and RC. I thought there were only 4 wires but upon further inspection, there is a blue wire that is not used. Could this be the
Thermostat C wire connection on Trane - DoItYourself.com
2019年3月9日 · Thermostatic Controls - Thermostat C wire connection on Trane - I purchased a Honeywell RTH6500 Wifi Thermostat, which requires a C wire. My old thermostat showed a connected blue wire to its C terminal. However, it was battery-powered. If I removed the battery, the thermostat screen would go dark. This is pretty close
Interpreting Thermostat Wire Colors | DoItYourself.com
2010年2月27日 · The most essential colors are red, green, and yellow, although you may find up to eight different wires in a heat pump thermostat, or as few as five in a more common hot water system. The red wire is connected to terminals beginning with the letter R, which include R, RH, and RC units, depending upon how the thermostat is being used.
blue wire on thermostat? - DIY Home Improvement Forum
2013年4月9日 · I have a question about the blue wire running from my air conditioning unit to my thermostat. I have been Honeywell RTH 230 B thermostat. I have the red wire hooked up to the Rc terminal, the green wire hooked up to the G terminal, the yellow wire hooked up to the yellow terminal That is the configuration for the air conditioning.
thermostat wiring - DoItYourself.com Community Forums
2024年12月8日 · Take the blue wire off of the thermostat and tape it off for future use. The outside unit still requires a C wire to the AH. Put switch on back in heat pump mode. That thermostat will not control aux / electric backup heat. It will run the heat pump ok without that operation.
No power to thermostat- no power on C wire but R wire has power
2013年11月19日 · Blue wire is attached to circuit board by a screw that grabs the wire which wraps behind the screw. There is no power to the blue wire at the screw connection. It is as if the manufacturer (Goodman) never intended power to that wire. Prior thermostat was Lux from original furnace and ran on batteries and no blue wire connection. What next?
Install new thermostat but not sure if I have wire C
2013年2月3日 · The C (common) wire is supposed to be blue and normally attached to chassis ground at the furnace. Get a meter and check voltage between the R and C. If 24 volts at the thermostat you should should be good. The red/white wire cable are on C/Y going to the air conditioner compressor. The other cable should have all 5 - maybe yellow was cut off.
wiring thermostat honeywell Blue wire B - DoItYourself.com
2007年12月24日 · Air Conditioning and Cooling Systems - wiring thermostat honeywell Blue wire B ? - I am replacing my old thermostat. its a round style gold tone (honeywell maybe?) has 30v max stamped inside it ( i assume this means 24V sys?) . my system is all outside. York gas heat/electric ac. Conventional NOT HEAT PUMP. old
Blue Wire ? for old Rheem system - DoItYourself.com
2022年1月8日 · Thermostatic Controls - Blue Wire ? for old Rheem system - Hello, l am setting up a Honeywell T9 Smart thermostat. I have a Rheem (model) RBHA-17J11SFAAI My only problem that I cant figure what the Blue wire is for W2 or E or something else. I have an 18-8 wiring and Black and Orange are not connected in the furnace
No voltage from blue control wire when replace old thermostat …
2024年12月1日 · ( im replacing the old battery powered thermo with a new amazon thermo, which requires a blue input ( C ) wire, so this all seems to add up and that would explain why the blue wire comes in from the outdoor compressor and doesn't bother to go to the thermostat. Any insights woud be amazing, thank you so much! [actual controlboard]