Question about Honeywell Programmable Thermostat Heater

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Air not working

Where does the blue wire go? my air will not turn on but when it touches r or rc the air willl turn on even when the unit says off!!

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  • 13 Answers

Put it on the terminal marked Y.

Posted on May 22, 2009

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1 Answer

I turn on the power switch and the blower turns on and stays on. I can get the pilot light to stay on but the burners will not light even after I turn the RED gas valve to ON. There is no thermostat...


Hello Skyhalliday,

I understand that you are having a problem with you central heat/air. You do not have a thermostat installed and have the red and yellow crossed in order to make the unit run.

The wires you have crossed are not to the heat if they are to the common color code. Here is the color code for HVAC units:
Thermostat / Wire / what is controlled
W / White / Heat gas valve or heat elements
Rc(Rh) / Red / 24 volts transformer
G / Green / Fan
Y / Yellow / Air Conditioner Outside unit
C / Blue or Black / Common (energizes thermostats that do not have batteries)

You may not have the proper wires shorted in order to have the burners engage.

Thank you for choosing FixYa.com

Justin

Apr 04, 2011 | Heating & Cooling

1 Answer

My wife disconnected all the wires to the thermostat, I do not know what goes to what. Reading the installation docs I get it that white is to white yellow is to yellow green is to green. But for the...


The Red wire goes to the RC-R with the jumper as you are using a one transformer unit. The C is for common and is usually blue in blue in the units I install.

The colors stand letters stand for
W - Heat
Y - AC (outside unit)
G - Fan

Thank you for choosing FixYa.com

Justin

Mar 13, 2011 | Honeywell Heating & Cooling

1 Answer

Recently changed thermostat on gas furnace w/ cent air


Unfortunately, a strick standard does not exist for wire terminals and colors. However, there are "norms" which I will be happy to share with you.
Red - Rh & Rc (Jumpered)
Blue - C
Yellow - Y
White - W
Green - F


Note: this is assuming you have only ONE transformer in your low voltage circuit for both heating and cooling. If there is a low voltage transformer at your outdoor unit you will need to seperate Rc & Rh. At this point, I have to recommend a trained, qualified service technician. A good service technician should be able to resolve the wiring issue in under 30 minutes.

http://www.youtube.com/watch?v=_HyhUyU-AMI
I only wish I was able to look at exactly what you have to include tracing all the wire back to the furnace and condensing unit. Tracing the wire is the only sure-fire wire to do the job correctly.

I wish this could have been a black & white answer; however, I do hope you found this information helpful in your endeavor. Good Luck to you! :-)

Mar 10, 2010 | Ruud UBHC Air Conditioner

1 Answer

I bought a new honeywell digital t stat, now i have 4 wires coming out of wall for ac to that thermostat and 2 wires off of furnace thermostat how do i hook them all to one thermostat


Tou may ahve a two transformer system. On the sub base of the tstat there is tterminals rh and rc they come with a jumper wire between them. Remove jumper. Hook the two wires from your heat to rh and w. Hook the rest of the wires Red rc yellow to y green to g and blue or black to c. Thats it . Keep in touch and I will walk you thru this. Rus

Dec 16, 2009 | Ruud UBHC Air Conditioner

3 Answers

A duo therm thermostat (p/n 3105058) was removed because it would not operate the air conditioner/heater in a firan fireside camper. it was knocked loose from the wall damaging it.the thermostat is for use...


a. Remove the cover of the thermostat.
b. Connect the RED wire from the air conditioner
to the “RC” terminal on the thermostat.
c. Connect the “YELLOW” wire from the air conditioner
to the “Y” terminal on the thermostat.
d. Connect the “BLUE” wire from the air conditioner
to the “H” terminal on the thermostat.
e. Connect the “ORANGE” wire from the air conditioner
to the “G” terminal on the thermostat.
f. Push the thermostat wires into hole in wall and
fill excess hole with insulation.
g. Mount thermostat base to the wall with screws
provided.
h. Check all thermostat wires on base to ensure
they are completely clear of the bimetal coil of
the thermostat. Adjust if necessary.
i. Replace thermostat cover.
If nothing operates on the air conditioner, remove the
return air grille assembly and verify the red, orange, yellow
and blue wires are properly connected (red-to-red,
orange-to-orange, etc.).
Next, disconnect the red wires and check for 12 volt
DC between the red wire from roof section and the orange
or blue wire from roof section. If no voltage received,
refer to Section F2. If voltage is received, the
problem lies with the thermostat or thermostat wires.
Next, disconnect all 4 wires (red, orange, yellow and
blue) from the thermostat. With the thermostat set on
COOL mode, FAN mode set on AUTO and HIGH, and
temperature selector set lower than the room temperature. Check for continuity between terminal RC (red wire)
and terminal G (orange wire); and RC (red wire) and
terminal H (blue wire). If continuity is achieved on each,
proceed with the next step.
Set fan switch to LOW. Continuity should NOT be present
between terminal RC and Terminal H, but present between
the other terminals (Y & G) and terminal RC.
If all of the previous checks are good, the thermostat is
good, do not replace it. If any one of the previous checks
are not correct, replace the thermostat.

Jun 15, 2009 | Dometic Rooftop RV Air Conditioner

1 Answer

Need help with wiring thermostat


first do you have a heat pump unit or standard a/c? standard a/c connections at the thermostat go like this red wire to rh-rc which is the 24v power and you don't have to remove the jumper.white goes to w which is the heating wire yellow goes to y which is the cooling wire green goes to g which is the fan wire and blue goes to c which is the common wire. so if your stat has rc- rh ywgc you should be set if the wires on the furnace correspond with the same alpha designation.orange may be used if u have a heat pump unit otherwise it may just be a spare you cap off and leave behind the subplate.

May 31, 2009 | Honeywell Heating & Cooling

1 Answer

Fan Only Won't Work


I jumped the rc and rh wires in the therostat box and now have fan only when selected.

Jul 01, 2008 | Heating & Cooling

4 Answers

Duo-Therm by Dometic Thermostat


red and white are positive and neg 12v
green is low fan
grey is high fan
yellow is cooling
blue is neg 12v(marked B-)

May 17, 2008 | Dometic Rooftop RV Air Conditioner

1 Answer

Intertherm to Honeywell thermostat


Typically if you have a yellow wire in the "y" terminal blue is used as common or "c". As far as your jumper from rc to rh, that will depend upon what type of heat you have. If all of your heat and cooling come from your packaged unit outside, yes you will need the jumper. If this does not work maybe you have a bad breaker or transfomer.

Oct 12, 2007 | Intertherm P3RA-048K Air Conditioner

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