Question about Honeywell Programmable Thermostat Heater
No heat pump hooked back up,heat comes from furance,did not see how the wires were connected
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Posted on Jan 02, 2017
I don't know if this will be helpful or not, but I just installed a new Honeywell and the Honeywell customer service guy helped me get the wires done correctly. The number is 800-468-1502.
Posted on Jan 05, 2009
hook up the blue wire in the furnace cabinet where the blower section and the other thermostat wires are connected to the furnace. the thermostat you have uses a common wire from the thermostat to the furnace and this needs to be hooked up in the furnace otherwise you will have the problem you are having.
Posted on Dec 07, 2009
usually you should have 4 or 5 wires....if you have AC then this wire should be Y if not was it connected at all before?...Heating requires only R&W
Posted on Oct 25, 2009
I printed out the instructions for your thermostat. It looks like you should have the following.
There should be jumper wire between Rh & Rc
Red wire to Rh or Rc whichever is easier since there is a jumper. This is the hot wire and all the thermostat does is connect to route it to the components needed for heating or cooling.
Blue wire, tape it up and don't use it. There is no spot on this thermostat for it. It is only used on thermostats that are powered by the transformer.
White wire to W. Powers the heat relay
Yellow wire to Y. Powers the cooling contactor
Green wire to G. Powers the indoor fan relay
There is a black jumper on the back of the face plate. Look at section 2.4 Setting J2 Jumper in the installation instructions. Make sure you have it in the right position for what you have. If you don't have them just google them.
Hope this helps.
Posted on May 24, 2010
SOURCE: Honeywell RTH3100C
You are on the right track, however, the biggest problem I see is that the new Honeywell thermostat that you have is for a heat pump system and judging off your old thermostat, you don't have a heat pump. A heat pump system requires more wires and different terminals for the extra components it has like the reversing valve and such and since you don't have any of those, your thermostat is trying to tell the old unit to do things it simply cannot do. Your wire colors are correct as you described and on a standard thermostat you will have the same terminals as you do now. C/B(Blue)= is common by the way. One way to look at the RC/RH terminals is to think of it as both 24v, one being for heat(H), and one for cool(C). When they are jumped together, it allows the thermostat to use one wire for power instead of two (Red). Hope this helps and good luck!
Posted on Jul 14, 2010
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"PLACE A JUMPER (PIECE OF WIRE) BETWEEN Y AND W IF YOU ARE USING A HEAT PUMP WITHOUT AUXILIARY/BACKUP HEAT." if this dosnt work check the fuse in the air handler you may have blown it if you did not turn the unit off before installing.
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