What type of equipment do you have ? Electric heat strips, heat pump, gas, oil?
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SOURCE: Programmable T stat
your trane heat pump energizes the reversing valve with O - orange y - is to turn on the unit make sure you have your orange wire hooked up and the tstat programming set to heatpump otherwise your reversing valve might be bad
SOURCE: Cannot get original Tstat wiring to work on a furnace.
The symptoms you describe make no sense at all but just connect the wires by color, R = red etc. leave the jumper between Rh and Rc, red goes to Rh, Blue would go to C. C = Common. If at any time you short Red to Common, damage can be done, usually a blown fuse or blown transformer. So unplug the furnace while doing your connections. By the way, the new t-stat you bought uses batteries and the blue wire should not be used. Good luck and comment back if you need more info.
SOURCE: I bought a Honeywell programmable thermostat
If all you have is a 4 wire system, then your new thermostat will be hooked up just as it was ( r,w,y,g) and if there is no jumper on the new thermostat, then you shouldn't need one. The jumper on some thermostats are used for internal controls and is just a way that that certain thermostat works.
SOURCE: Have a ct87k. Got power at wall. Plug t-stat nothing.switches are both off for gas.
Those normally do not fail, they have a mercury switch in them. However there is a cravat they have to be mounted level and up side up. If that is the way it is mounted then just replace it.
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