Good Day, I recently changed my thermostat from a White Rogers to a Hunter programmable model 44260. I connected the system myself and now realize that the heat is not coming out of the vents. The fan is blowing but cool air. I have six wires coming out of the wall plus a jumper on the thermostat. I don't feel as if this was connected correctly, and no longer posses the color coding for the new thermostat. Can you help.

Usually there is a 24 volt AC transformer in the furnace with the secondary winding connected to a red wire running to the thermostat and a blue wire to the gas valve, A/C relay, and fan relay. From the thermostat there will be white wire to the gas valve, yellow to the A/C, and green to the fan. The thermostat is wired to switch the power from the red to the white, yellow, and green as needed with the blue completing the circuit. It may be wired to have the control wires return to the furnace and its controls and then a second wire goes to the A/C unit.

Thanks for your reply. So what you are telling me is the black wire should be covered up or not used. I presently have the blue wire covered up. But I noticed the heat pump is not running outside, when the heat comes on. Is this pump suppose to run continually or shut off when the thermostat shuts the heat off at room tempeture? Also which wires correctly goes where? I have these displayed on my thermostat plate ( G,RC,RH,Y/O,W/B,Y1) I presently have the Green wire on G, White on RC, Red on RH, Yellow on Y/O, black on W/B, my blue is covered.But something still isn't right.

CJuster7

I am not familiar with heat pumps. Is the heat pump your only source of heat, or auxiliary to a gas or oil furnace?

Heat pumps need to be switched from cooling mode to heating mode. In the past, did you do that simply by switching modes at the thermostat?

RC and RH are red cool, and red heat. If you have one transformer, connect the red wire from it to RH, and jumper it to RC. If you have 2 transformers, connect the red wires individually to the correct terminal. I would try removing the white from RC, and jumpering it to RH. Since red on RH and black on W/B isn't working, try white on W/B. The outside pump and fan must both run to get either heating or cooling.

If that still doesn't work, check the outside unit. Often the same cable is run from the inside unit to the thermostat, and another length to the outside unit. There should be 2 wires connected to the coil of a relay there. One should be blue and run to a terminal in the inside unit labeled B or BL. The other must be hot in both heating and cooling mode. It is possible there will be 2 relays outside, one connected to the W/B and the other the YO at the thermostat. There must be relays to both turn the pump and fan on, and to switch modes.

Check this and let me know.

Good Morning and thanks for your help. Be advised I do have heat, so I guest the heat pump is not my only source. I don't know of any switch modes for this system. When I purchased the house, this was how the system was hooked up. In the winter the heat would come on, but the pump outside would stay on causing cold air to continuly blow when the heat stop. I had the jumper wire hooked up before but it did not work. I put the white wire on the RC port because it din't work on the y/o. I guest I really want to know can I damage anything the way the system is set presently? I do have heat.The fan isn't working but the pump must be.

CJuster7 :cool:

I am glad you have heat. Cold Kids are no fun. I wish I knew more about just what sort of a system you have. I am afraid it may still not be working the way it should. Most systems have a heating unit of some type in the house, basement, crawl space, or garage. The cable runs from it to the thermostat. There will also be wires to any outside part. After I posted my answer, I realized there may be an easy way to figure out the wires and terminals at the thermostat. Check the cable at the heating unit. Make a list of the terminals labels and the wire colors. If the labels are the same WG,RC,RH,Y/O,W/B,Y1, it is a simple matter to connect the same wires to the same terminals on the thermostat. Then things should work right. Depending how complex the system is, the outside unit may have more then 2 control wires with similarly labeled terminals. Again, check to see if the wires are connected to the same terminals at both ends.

Most thermostats can be switched between heating and cooling. In most systems, that is all you need to do. If your system runs the cooling too, it is possible you need to switch something manually. If getting all the wires on the right terminals doesn't eliminate the cold air blowing, perhaps you should have a service man look at the system. If he finds a problem left by the previous owner, the previous owner may be liable for the cost of the repair.

10-4 Thanks for the help. BJ

My furance turns on for about 30seconds turns off for about 3 seconds over and over blower does not turn on