How do I install my Honeywell RTH6400 Series Programmable Thermostat?

The thermostat has four wires of two greens, one yellow, one black. I need thorough information and steps. A link to a helpful video would be great.



Much thanks in advance.How do I install my Honeywell RTH6400 Series Programmable Thermostat?i really dont advise trying this yourself, but 2 green wires doesnt sound right for a stat hookup, check how it is wired on your units and this will give you a better idea



to be honest you really should call a hvac repairman, and remember if you do try to do this yourself turn off the power first!!!!



G- fan (green)

R- power (red)

Y- compressor (yellow)

W- Heat (white)



is normal, in your case one of the greens might be power and the black might be heat but there is no telling, dont cause damage to your unit just call a tech!How do I install my Honeywell RTH6400 Series Programmable Thermostat?i would agree with the above answer,you would not want to blow a transformer if you wire it wrong.I am sure you can get a service tech to come for around 70How do I install my Honeywell RTH6400 Series Programmable Thermostat?Maybe these sites can help you.