Wiring honeywell dt92e

SOURCE: Change thermostat

You have caught me without my old books, but I can tell you the orange wire is for the reversing valve on a heat pump. Almost all manufacturers, except for Lennox, are: R=Power (24volts), G=Indoor fan (Blower), Y=Cooling (A/C), and W=Heat. Some t'stat's are set up to use 2 separate transformers (24 volt), that is why you will see Rc, Rh. This is power for cooling and power for heating. If this is what you have, just take the Red wire and strip it back far enough to go under both screw terminals if the unit is a residential one. I've been doing commercial work for over 20 years and have never seen an "A" terminal, so I can't help you there. You may want to double check that. If I'm reading you correctly, I would put the orange wire on the "O" terminal. Don't understand why the "Y" terminal is not used. It turns on the compressor. The "O" goes to the reversing valve to "Tell" the outdoor unit that it is either in the cooling or heating mode.

Good Luck and let me know if I can help any further.

SOURCE: three wire system, going to a five terminal

The Rc and Rh should have a jumper wire between them let it in. and hook the red wire to one of them it does not matter which one as they are jumpered. The white wire goes on the "w" terminal and the Blue wire will go on the "G" green terminal to run your fan.
This should get you up and running again!

SOURCE: How do I wire a Honeywell room thermostat T6360B1028?

The red goes to R or rc and the blue would go to C or common sometimes its BK on the thermostat and the yellow would go to Y.

SOURCE: need to know what color

Please detail your equipment, problem and your country as the answer depends on all those things.

SOURCE: How do I remove a Honeywell DT92E Thermostat from

turn off power to thermostat. should be a small flat head screw located on the bottom of the unit. release screw and lift face from the bottom, out and up. you will then need to identify wiring before removal of back plate unless the wiring is redundant.