Question about Honeywell Electronic Programmable Heat/Cool Thermostat - CT3300A100 Heater
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Posted on Jan 02, 2017
you have to go down to your furnace and follow the thermostat wire ...it connects to a terminal strip or fan centre...the color doesn;t really matter...installers mix and match all the time....look at the furnace wiring and mark it down...Red on "R"...Green on "Y" whatever it is...and connect it accordingly upstairs...if you only have 4 thermostat wires downstairs you will need a jumper wire between RH and RC...if you have 5 wires you will see 2 wires on "R" at the furnace.,...and connect either to RH and RC at the thermostat
Posted on Nov 01, 2009
SOURCE: Old wiring looks like this
If you have a heat pump, the thermostat that will operate it most generally will have an "O' terminal for the orange wire, this is the circuit that energizes the reversing valve on the heat pump, be sure that the stat says heat pump on the box. hope this helps
Posted on Nov 07, 2009
Here is the manual with the wiring. Never worry about colors rather terminals.
Posted on Dec 08, 2010
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