A/C thermostat wiring problem

Look here for the manual:
http://www.honeywellconsumerstore.com/store/images/pdf/rth111b-vertical-digital-non-programmable-thermostat-installation-manual.pdf

Totaline is a brand name of the Carrier Corporation. Go on www.totaline.com and research the model of your thermostat. User manuals are available.

check condenser fan line. over heat condenser so have not cooling in home.no cooling so Thermostat not worked.if it's ok. check Thermostat volb lick .

getting heat in the cooling mode leans toward the reversing valve in the outside unit. it changes the flow of refergerint so that the hot air you get outside in the summer is blown inside in the winter. another possibility is that the reversing valve isn't getting 24v check to see if you have 24v at O and C either at the t-stat, furnace, or the outside unit. if you check at the furnace rember the safty switch for the lower door if that switch is open you will have no power. i would look at the t stat first if you have 24v there go to the outside . 24v present outside will mean a bad valve or board, no 24v means a bad or broken conection in the control wire between the stat and the outside unit(usally the orange wire)

Hi,
Here is a tip that will help you with that...

http://www.fixya.com/support/r3623083-thermostat_wiring_terminal_designations

heatman101

Cut the wire you dont need it with the new tstat. Russ

it could be abad thermostat or wiring problem

what are the choices on the new t-stat need to know that first

Blank screen sounds like a fried thermosat. Abrupt outages can affect certain types of thermostats. Make a jumper wire and jump across R and G. See if you get any action from anywhere. If a fan or compressor kicks in you know you have a burned out thermosat...

the thermostat will to any temperature but will not shut off