At Fixya.com, our trusted experts are meticulously vetted and possess extensive experience in their respective fields. Backed by a community of knowledgeable professionals, our platform ensures that the solutions provided are thoroughly researched and validated.
Hooking up a heat/cool thermostat that we are only hooking up for heat, my question is the wiring color on the old thermostat do not match the wiring instructions for the new thermostat. What do I do?
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
sounds like your heater already has 120 going to it at all times. it doesn't heat because it needs 240. therefore your tstat breaks the black, when it calls for heat it closes the black therefore giving your heat the remaining 120 and begins to heat. I would think it would work just with the blacks going to l1 t1 but if l2 t2 needs the jumper you are not doing any harm. who knows what goes on inside your walls but if it ain't broke don't fix it
apparently who ever did the wiring installation did not use the Proper color coding when they did the install. Now you must trace the wiring to the appliance and wire accordingly.
That's very possible. Maybe when you were pulling it was snagging on something. I would strip the new wire again at the splice and give it another shot. Possibly
First things first. What type of system? Heat only, boiler or furnace? Central cooling. Do NOT take wires off the old thermostat yet, or mark the color wire, to the terminal letter. Most times W,Y,G,R, terminals and maybe even a C terminal.
Your new thermostat should have the same letters. Sometimes they mix up color wire with terminal letters...... example (yellow wire to w terminal) Also turn off power to equipment it is controlling. It is not high volts but you can short out the transformer. Hook uo wire color to same letter terminal on old stat, to new stat. Thats it.
I would recheck your wiring..... Shut the furnace off at the breaker or SSU.... Then get a pen and pad and write down the color of wires and where it is connect on the Terminal strip at the furnace..
Example: Red wire hooked to R terminal etc They should all match up with the subase of the new Thermostat.
Then go up to the thermostat and Check and make sure the colors match what you have wired at the furnace. R= Power W=Heat G=Fan Y=Cooling C=Common
There are two possible ways the heat could be power on all the time..... You have the white wire or W wire wired to G and the thermostat is set to Fan ON... or the insulation on the R wire and W wire is split and touching each other or they got pinched and are touching together which will make the furnace come on with out the thermostat controlling it..... Good Luck, Its is where I would start first.... there our other possibilitys the control board may of gone hay wire.....
This should help you. You need to know if your thermostat is powered by the unit or independently and which way your reversing valve switches (I,m not sure on a Bryant, but probably Your old O wire goes to your new O terminal. They should pretty much match up, the new stat just has more options. Thermostat wiring
Jumper R to Rc and hook hot wire from transformer to R usually red wire
O = Reversing valve probably white or orange If you get heat when calling for cool or Vice Versa then switch wire from O to the B terminal.
Y = Contactor usually yellow
G = Blower usally green
Jumper Aux to E need to go to unit and use the wire that goes to your Auxiliary or 2nd stage heat
L = Light if you have this terminal on your unit then hook it up.
C = Common from transformer usually black, if you have this terminal on your unit hook this wire up.
Make sure you go to your unit and only hook these wires up if they go to these locations.
the normal wiring for stats is white=w=heat,red=r=24volts,green=g=fan,blue=c=common,yellow=y=cooling.
see what ties into your furnace board and match the terminals.
What color wire is connected to the "Y" terminal on the thermostat. If the unit you are connecting is a heat pump A/C unit the orange wire is for the heating mode. Normally the "Y" terminal on the thermostat. "R" terminal on the thermostat is the power to the thermostat, "W" terminal is for heating, "Y" is for cooling, and "G" terminal is for fan operation. At the condensing unit for cooling the brown and yellow wires would normally be for the cooling.
×