Question Ac thermostat

[marykgloor]

Old ac London sure 5th wheel. Thermostat is not connected and the wires are orange, orange/white, blue and blue/white. Then the white and black to power source. How do I connect these to a thermostat?

 

[B52Bombardier1]

A make and model number from your AC would help to find a wiring diagram. The re-connection would be very easy after that.

Rick

 

[marykgloor]

Coleman model 6759 D 702

 

[Rich W.]

This article explains HVAC color code standards, but you may not have “standard” color coded wiring. The blue/white and orange/white may be an additional zone since blue and orange are heat and cool respectively, or they may be unit specific - haven’t encountered those.

Heat Pump Thermostat Wiring Diagram - Today's Homeowner

Installing or replacing a heat pump thermostat can improve your HVAC system’s efficiency and help you save on energy bills. Most modern thermostats cost

todayshomeowner.com

 

[marykgloor]

This article explains HVAC color code standards, but you may not have “standard” color coded wiring. The blue/white and orange/white may be an additional zone since blue and orange are heat and cool respectively, or they may be unit specific - haven’t encountered those.

Heat Pump Thermostat Wiring Diagram - Today's Homeowner

Installing or replacing a heat pump thermostat can improve your HVAC system’s efficiency and help you save on energy bills. Most modern thermostats cost

todayshomeowner.com

Thank you for your help

 

[Rich W.]

Its possible that not all the wires are unused. Do you have the original thermostat? It will have wire color codes at the terminals. This might help too:

http://techsupport.pdxrvwholesale.com/wp-content/uploads/2018/12/Coleman-Specifications-6759-720.pdf

 

[marykgloor]

Its possible that not all the wires are unused. Do you have the original thermostat? It will have wire color codes at the terminals. This might help too:

http://techsupport.pdxrvwholesale.com/wp-content/uploads/2018/12/Coleman-Specifications-6759-720.pdf

I saw that my furnace has blue and white coming off it, so I was thinking orange is y, orange/ white is g blue/white for heat or B and maybe the blue is still the c? I had thought I was on the right track but felt like I was going in circles. That’s when I reached out here, lol. The old thermostat is an old Coleman Mach. It has the correct color scheme, yellow, blue, red, green, grey. The orange and striped threw me a bit.

 

[Rich W.]

me too