[noelstanley]

I took a old HVAC thermostat off without labeling the wirse and do not know which wires are which. Is there an easy way to figure it out?

Thanks,

Mr. Did not follow the directions.

 

[qbert]

Turn furnace power off, remove bottom door look at terminal block where low voltage wires go, write them down. Then connect the thermostat as paper indicates.