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I have a colman electric furnace eb15b it had a/c.i am using it as a furnance only.i used the white red wire for thermostate.it works but not great.blows hot for a short time.then warm only.takes a long time to heat the house.

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  • sloeridre May 11, 2010

    what kind of thermostat do you have? Could be the sequencer for your heatstrips is failing. How many k/w's ? Does it have a sequencer or contactor?

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You need to make sure that both sides of the heat kit are coming on. One of the heating elements could be bad. Turn the power off and remove the heat kit. Check and see if there are any visible breaks on it. Also, when the unit is running, take a volt meter and check for voltage to the heat kit. You can also do a continuity check to see if the heating elements are good. Good luck.

Posted on Mar 16, 2009

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1 Answer

Have a Carrier Electric Furnace & AC, Model #FA4CNF048 and need to know how to connect a Blue wire to power to supply C wire for new Honeywell Wi-Fi thermostat. Any Suggestions?


C is common for 24 volts from the a/c transformer secondary or low side. R and C are 24 volts and will power up loads of 24 volts such as thermostats requiring to be powered up,
C is usually grounded or connected to the metal of the a-c unit. Use any color available to connect the wi-fi thermostat C to the a-c C to deliver 24 volts to the thermostat.

Jul 06, 2015 | Carrier Heating & Cooling

1 Answer

AC and fan work fine can't get burner to come on


Open the furnace, access the control wires going to the thermostat & jumper the white & red wires to bypass the thermostat. the control wires should consist of Red, white, green, yellow, or blue.

Dec 06, 2013 | Goodman Heating & Cooling

1 Answer

Why does my Colman EB10C electric heater start & run for a few seconds,stop, then restart & run?


check your high limit switch find blower motor and unplug white wire let furnace run it should shut off when hot enough if same problem replace high limit switch

Jan 04, 2013 | Coleman Mobile Modular Home Electric...

1 Answer

How do u wire athermostat to the furnance and ac unit on model e3eb-015h nordyne


You need to get low voltage wire known as 5 wire. run wires thru wall to stat and furnace Red wire goes to R terminal white to W terminal Green to G terminal Yellow to Y terminal on both the stat and furnace circuit board. Now you need a wire called 2 wire low voltage wire run that from furnace circuit board to outside A/C. At furnace hook red wire to Y terminal and white to C terminal doesnt matter which ones you hook up at outside unit. Do it just like i told you this will work properly.
If this helps please rate me.

May 20, 2011 | Heating & Cooling

1 Answer

I have a travel trailer with a roof top a/c colman mach111 and I hooked up a thermostate digital. The heat works but cant get a/c to come on. the termanials on hunter thermostate are G W Y RC RH


OK, the wiring that you should have in your RV is as follows: Red White Blue Yellow Green Gray.

This Thermostat will not work on this Air conditioner because the tstat you are installing is a 24V thermostat. The connections are as follows G = Fan, W = White, Y = Cooling, RC = 24V Cool, RH = 24V. The only thing that I can think to do is hook it up like so.

On the G Terminal, Hook up the Green wire from the wall. On W, hook up the White wire, Y, hook up the yellow wire. RC = run a jumper from the RH terminal, RH = hook up the red wire. If this doesn't work then you will have to go back with the coleman thermostat.

Jul 03, 2009 | Heating & Cooling

1 Answer

I need help with my central heat and air unit, it has a heat pump. the model number is GQ3RA-036K. I am changing the theromstat out and the wires are connected to it. there are eight wire colors that are...


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Please note. Not all installers use the proper color codes when they install or replace equipment. It may be necessary go go to the furnace or outdoor unit to verify what wires are for what purpose. Also be sure there are no splices in the wire that could change the wire colors between components.
  • R (red) or Rh (Red heat) 24 volts from equipment.
  • Rc (Red cooling) 24 volts from transformer in cooling equipment.
Note: If only furnace has a transformer and cooling equipment does not jumper Rc and Rh.
  • W (White) sends 24 volts to furnace control to start the heating cycle.
  • W2 (no standardized wire color, usually whatever wire color is available) controls second stage heat.
Note: W2 is most often used for heat pumps to control what is called emegency heat or Auxillary heat, and most often will use the white wire.
  • Y (yellow) often (blue) is used, controls cooling unit (outdoor condensing unit) also is used for heat pump heat.
  • Y2 (no standardized wire color, usually whatever wire color is available) controls second stage cooling.
  • G (Green) controls the fan "on" operation of the furnace/air handler. Also often is used to start the blower for many electric furnaces.
  • C (common) most often brown but can also be black or other color available to installer.
  • O (orange) Energizes heat pump reversing valve for cooling (Trane and most other brands).
  • B (Blue) Energizes heat pump reversing valve for heating (Rheem, Ruud and Weatherking).

May 07, 2009 | Heating & Cooling

1 Answer

Furnace blows cold air, ignitor won't glow.


ok this is going to sound funny but it seems as though the polarity is reversed going into your furnance. to correct this proiblem you first need to unplug the unit and where the cord goes into the furnance at that connection disconnect the two wires. Once theses are disconnected switch the wires .All you are doing is reversing the way the electricity flows into the circut board. I would wager that is the problem

Apr 13, 2009 | Heating & Cooling

1 Answer

Disconnecting green wire from thermostate did allow furnace to run properly but every time I want to switch back to heatpump I must reconnect green wire again.Here is how wires are connected to...


Try this.

A T-stat.

Orange = O
Red = R (with existing jumper)
Black = C
Yellow = Y
White =W1 (Or AUG)
Green =G

At airhandler/furnace.

Green = blower wire (usually green, double check with schematic)
(Green should not go to the HP.)
Orange to HP
Red to red and to HP
black to blue (or C) and to HP
White to W
Yellow to HP. (It may also go to a "float switch" if installed. but that will just be a safety switch on the drain pan in case the line clogs and it overflows.)

The green is typically used for the blower motor. (furnace only)

The orange is used for the reversing valve. (changes from AC to heat, is located in the HP only)

Blue is typically used for common (or "C") but they may have changed it to black due to a broken wire, or other problems.

The only wires going to the HP should be
Red
Blue/black
orange
yellow

Orange should not be going to the furnace at all.

HP wiring should be
Orange to orange or O
Red to R or red
Blue/black to blue or C
Yellow to Y

Dec 09, 2008 | Heating & Cooling

1 Answer

What's the deal? Wont shut off or respond to thermostat. . .


Red= power........White=heat.............Green=fan.................(grey)-(yellow)=cool .....these are the connectons. Disconnect these wires from the thermostat and know that red/power is the only wire that send power to the thermostat, and the rest sends it back to the unit to call for whatever,, red--to . white for heat... red to green for fan .... &red to grey for cool! OK! Turn all your power on, and use a jumper wire from red / green for fan and see if the fan comes on! Then move the jumper wire from red to green , to red / to white for heat and the fan , wait for 3 minutes before removing and going to the next step. Then red /to grey for cool and check if the outside comes on. Either you have a wire touching past the insulations and making a connection, a bad thermostat ,oe excessive wire lead touching the next connection.Thank you very much!

Nov 05, 2008 | Intertherm Heating & Cooling

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