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If you only have 5 wires to the thermostat you can eliminate the C (brown) but the brown still has to go to the outdoor unit.
The colors in (parentheses) can be different in your bundle but its best to keep some sense of normalcy.
Yellow and Blue will not attach to the air handler, they will be wire nutted directly to the yellow and blue leading to the outdoor unit.
If the AC worked, then the O/B should be already set.
What else can I help you with?
What is the purpose of the orange wire on a thermostat?
The purpose of the orange wire on a thermostat is to connect the thermostat to the heat pump, allowing it to control the heating system.
What is the purpose of the orange wire in a thermostat?
The purpose of the orange wire in a thermostat is to connect to the heat pump, allowing the thermostat to control the heating function of the system.
Where is the emergency heat switch on a Carrier HVAC system?
If you have a heat pump it will be on the thermostat, if the thermostat for some reason has been changed to manually wire up emergency heat , remove the thermostat after you kill the power and connect the red wire too the green and white wire then turn the power on, you will have heat.
How do I properly wire a Honeywell thermostat for a heat pump system?
To properly wire a Honeywell thermostat for a heat pump system, follow the manufacturer's instructions provided with the thermostat. Typically, you will need to connect the wires from the thermostat to the corresponding terminals on the heat pump system. Make sure to turn off the power before wiring and double-check your connections to ensure they are correct. If you are unsure, it is recommended to consult a professional HVAC technician for assistance.
What is the purpose of the blue thermostat wire in HVAC systems?
The purpose of the blue thermostat wire in HVAC systems is to connect the thermostat to the air handler or furnace, allowing the thermostat to control the heating and cooling system.
What is the purpose of the white thermostat wire in HVAC systems?
The purpose of the white thermostat wire in HVAC systems is to connect the thermostat to the air handler or furnace, allowing the thermostat to control the heating and cooling system.
How should I properly wire my ecobee thermostat to a heat pump system?
To properly wire your ecobee thermostat to a heat pump system, follow the manufacturer's instructions provided with the thermostat. Make sure to turn off power to the system before wiring to avoid any electrical hazards. It is recommended to consult a professional HVAC technician if you are unsure about the wiring process.
What is the purpose of the thermostat OB wire in a heating and cooling system?
The purpose of the thermostat OB wire in a heating and cooling system is to control the reversing valve in a heat pump system, which changes the system from heating to cooling mode or vice versa.
Why was power lost to a heat and air thermostat?
The power to the thermostat comes from the transformer in the furnace or air handler whichever you have. 1) the power to the furnace/AH is off, 2) the control fuse that protects the transformer is blown, 3) the transformer is defective, 4) the wire between the furnace and the thermostat got cut.
What is the 2 wire thermostat wiring diagram for heat only systems?
In a 2-wire thermostat wiring diagram for heat-only systems, one wire connects to the R terminal on the thermostat and the other wire connects to the W terminal. This setup allows the thermostat to control the heating system by sending signals to turn it on or off.
How to wire a 5 wire thermostat properly without a diagram?
depends on whether thermo used on gas or elec. unit, heat pump, strip heat, etc. red wire is hot wire. White wire goes to heat. yellow wire goes to outdoor unit contactor. green wire goes to indoor fan. blue or brown wire goes to reversing valve on outdoor unit.
Replacing air thermostat for central air conditioner?
1st thing to do is turn off power to unit. if you dont do this you risk of burning up the transformer.. all thermostat wires are color coded. if you can pull the old thermostat off and match them to the new thermostat it shouldnt be a problem hopefully the tecnician who installed the unit hooked it up right but the color code should be this- R is RED that is your power wire 24v Y is YELLOW that is your cooling wire W is WHITE that is for your heat G is GREEN that is your operating the fan Those 4 are for straight heat and cool.. if you have a heat pump there will be an aditional wires which is- O is ORANGE wire that is for the reversing vavle some units also have a common wire and that is the BLUE wire.. That would be attached to the C terminal on a stat..
