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Bryant programmable thermostat will switch on furnace

Bryant programmable thermostat has power. Fan will come on manually to test power to thermostat but it will not switch furnace on.

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  • Anonymous Mar 12, 2014

    Should there be a orange light on in front of my Bryant furnace

  • Anonymous Mar 12, 2014

    Should there be a orange light on in front of my Bryant furnace



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Turn the power off to the Air handler unit.
Remove the thermostat from the wall, (Just the face part).
Look on the back side of the thermostat and verify that the jumpers are set to electric and not gas, otherwise the fan will not run during heat mode, they come from the factory usually set for gas.
If this is a electric heater this will solve your problem, If it is gas then it will be more detailed. Once you put it back on keep in mind that most thermostats have a 3-5 minute delay so just give it a little time and the fan should then work once you have the jumpers in the correct position.

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Posted on Nov 17, 2009


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Honeywell manuals

Turn the fan in the ON position to verify you have power to the furnace. If the fan turns on, turn it back to AUTO. Pull the thermostat off the wall to get to the low voltage wiring. If you have a gas furnace, pull the red & white wires off and pinch them together. If the furnace starts, the thermostat is bad. If it doesn't start, then begin looking for flame roll out switches in the furnace burner compartment to manually reset. If the furnace inducer (combustion motor starts, & you get no flame, then it is either an ignition problem, or someone didn't pay their gas bill. :0

Dec 11, 2013 | Honeywell Programmable Thermostat Heater

1 Answer

Bryant furnace

1) Shut power to furnace off, take panels off furnace.
2) Bottom part of furnace find the thermostat wires and make sure they are not touching each other where they connect control boards. You Should see Terminals R,G,W and Y.

3)This is a typical wiring if done by technician.
R=Power-should be red wire
W=Heat-should be white wire
G=Fan-should be green wire
Y=Cool-should be yellow or blue wire.

4) Disconnect the G terminal which is the fan leg and move it out of the way. Turn power on and turn thermostat up. The fan should not turn on until after the burners turn on. The fan should cycle off about 60secs. after the burner turns off.

5) If all of this happens make sure the wires at the thermostat are wired the same at the furnace Red to R and Green to G.
The color of wires you have may be different. But if the same colors are connected at the same terminals at the furnace and the thermostat, that is all that matters.

6) If you recently changed the thermostat, make sure the Rd or R terminal wire is not touching the G terminal wire at the thermostat.

Nov 02, 2013 | Heating & Cooling

1 Answer

Bryant programmable thermostat doesnt keep the temp have to put it on fan instead of auto

My guess is that you have gas heat. If this is the case, sounds to me like your main control board or depending on age of furnace, fan controller is not working. With gas furnaces, it utilizes 2 fan speeds. High for cooling, & Low for heating. Your thermostat only controls the High speed - switches when you turn your fan on & when there is a call for cooling. The only other thing I can think of is it is possible that the Low speed windings on the blower motor are open causing it to not turn on. Most motors have 3 to 4 speeds & only 2 are used. Switch the heat motor wires in the furnace (on the control board) with one that is on a spare terminal.

Feb 21, 2013 | Bryant Cube Series 1 Stage Heat/ 1 Stage...

1 Answer

I recently switched out an anolog thermostat for a programmable one. I programmed it and everything looks fine except the furnace isn't turning on. I manually bumped up the temp and nothing happ

My suggestion is you made a wiring error. Does the furnace come on when you turn the thermostat DOWN?
Re-check your wiring.The AUTO-MAN switch for the fan only switches the fan on, leave it in auto.

Feb 11, 2013 | Heating & Cooling

1 Answer

Changed to lux9100e thermostat and get reversed polarity message on bryant furnace

I think it means that you need to reverse the wires to their respective connections on the thermostat..

Sep 24, 2012 | Lux Tx9100e 7 Day Universal Programmable...

1 Answer

Problem with thermostat (honeywell rth111/221). Furnace turns on evern when the switch is in the off position and with the fan switch on auto. switch the fan to on and the heat turns off. Again, all this...

should be installed with
1) red to rc and jumpered to rh
2) green to g
3) yellow or blue to y
4) white to w
to test: remove t-stat connect white and red - furnace should operate normally unitil you disconnect.
if it does replace t-stat

Oct 27, 2009 | Honeywell Programmable Thermostat Heater

2 Answers

Thermostat wiring

First do not adjust the dip switches they are factory set to the parameters.

Second, W (usually white) is your furnace
O (usually orange) is your heat pump
G (green) indoor fan
R (red) 24 VAC
C (blue) Common 24VAC
Y (yellow) Condenser

May 05, 2009 | Heating & Cooling

1 Answer

Auto fan does not turn my furnace fan on-I have to use manual on

with the fan in the auto position, the fan only comes on during a demand for heat.  does it not come on during a demand for heat?

Nov 24, 2008 | Honeywell Programmable Thermostat Heater

2 Answers

Honeywell thermostat

If you have a forced air furnace with an air conditioner attached make sure you have a jumper wire between Rh and Rc. If the Bryant thermostat had a wire hooked up to C you do not want to hook this up to Rc. Just cap it off and put it back in the wall or disconnect that wire down in the furnace.

Aug 10, 2008 | Honeywell Programmable Thermostat Heater

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