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HAVE A NATURAL GAS FURNACE. PILOT KEEPS SHUTTING OFF. REPLACED THE THERMO COUPLER AND CLEANED ORAFICE BUT STILL KEEPS GOING OUT. ANY SUGGESTIONS? THANK YOU

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Did you adjust the therm coupler to the flame correctly, even a little bit off can keep the pilot from sustaining.

Posted on Dec 06, 2008

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My gas furnace is blowing cold air. I was told by gas company that it is due to a gas pipe leak. Is this true ? How will it be fixed? What problems can i expect in the future? The furnace is 20yrs old.


If the pilot light is on then it could be in the thermo coupler. If you don't know where to loon it is best to hire a professional. Gas indoors is no joke. Second is that a 20 yr old heater is pretty inefficient and a new one could be had for a little more than the repair costs of the old one and you co upd have another 20 years trouboe free

Feb 28, 2013 | Air Conditioners

1 Answer

My rheem electric igniting furnace is lighting and going out over and over. It is model number M3UF032SA. Thank you!


Replace thermo-coupler . Should be able to take urs out and take it to a hardware store and match it .
Make sure u shut gas off before removing
It .

Dec 20, 2012 | Air Conditioners

1 Answer

My heil furnance comes on but no hot air or air at all


see this causes and fix it. God bless you
o light the pilot on a standing-pilot (always on) ignition system, follow the lighting instructions located near the control. Otherwise, try these steps: Light the pilot:
  1. gasfurnace1.jpg Press and hold the pilot control knob to start the pilot. Set the control knob to the pilot position. Hold a long match under the pilot gas port.
  2. Press the control knob; the pilot should light. Hold the control knob down until the flame is burning brightly (about 30 seconds). Release pressure on the knob, and turn it to the on position.
  3. If the pilot goes out when you release the control knob, try relighting, holding the control knob down longer. If the pilot again goes out, check the thermocouple (below).
Adjust the pilot:
  1. Remove any cap covering the pilot adjusting screw on a combination control.
  2. Turn the adjusting screw counterclockwise to increase the flame or clockwise to decrease it. It is correctly adjusted when the flame envelops the thermocouple bulb by 1/2 inch and appears dark blue with a small yellow tip.
Test and replace a thermocouple:
  1. Hold the control knob to pilot and light the pilot as above.
  2. Unscrew the thermocouple fitting with an open-ended wrench.
  3. Set a multimeter to the DVC (lowest voltage) scale.
  4. Clip one multimeter lead to the end of the thermocouple tube nearest the pilot and the other lead to the fitting on the other end of the tube.
  5. If the multimeter shows a reading besides zero, the thermocouple is functioning. Replace the thermocouple tube.
  6. If there is no reading, you will need to clean or replace the thermocouple following steps 7 through 11.
  7. Release the control knob and shut off the main gas valve on the gas-supply pipe that leads into the burner. Shut off power to the burner at the electrical service panel .
  8. Remove the thermocouple from its mounting bracket.
  9. Wipe the combination control clean and install a new thermocouple, tightening it by hand, then give it a one-quarter turn with a wrench.
  10. Insert the thermocouple into the pilot bracket, being careful to not crimp the tubing.
  11. Turn on power to the furnace and relight the pilot (above).
Adjust an adjustable burner air shutter:
  1. Set the thermostat to its highest setting to keep the burner running. Once the furnace has heated up, remove the burner access panel and loosen the locking screw.
  2. Open the shutter by turning it to the right until the blue base of the flame appears to lift slightly from the burner port surface. Then close the shutter until the flame reseats itself on the surface.
Clean removable burner tubes and ports:
  1. Shut off gas and power to the furnace.
  2. Unscrew or loosen and remove the tubes from the supporting bracket.
  3. Carefully clean the tubes with a brush or vacuum, making sure not to damage the burner ports.
  4. Use a stiff wire to clear any debris from clogged ports.

Oct 08, 2012 | Honeywell Icp Heil Tempstar Furnace Spark...

2 Answers

Where can we get a thermo coupler for a floor furnace Ward Model 570EDR.


Most floor furnaces use the millivolt gas valve and need a pilot generator to operate correctly. These generators are bit more than a standard thermocouple.

Ebay has one for less than $20

Apr 26, 2011 | Air Conditioners

1 Answer

Hi i have a york diamond heater in my attic. I went up in the attic and revomed the grill and the four burners are not coming on. it clicks and u smeal gas but it will shut off. the little blower motor...


If your furnace uses an electrical glow element to light the pilot light, the Glow Element will need to be replaced. Glow Elements are general used on 90+ High Efficiency Gas Furnaces.

If it uses a standing pilot light rather than the Electrical Glow Element, you need to manually relight the pilot. Since I can't see your furnace, you will need to locate and read your Owners Manual on how to do this or look in the side or inside the pilot light compartment for instructions on how to light it.
Be sure you have stick match or a butane grill lighter with you before you try to light it.

If it's a manual pilot ... if after lighting it, it doesn't hold when turned to the ON position, more thank likely you'll need to have the Thermocouple replaced.

And above all, BE CAREFUL. If you don't feel comfortable lighting a gas furnace, call a professional.

Feb 07, 2011 | Air Conditioners

1 Answer

The furnace will come on but the pilot will not light


When you say: "the Furnace will come on"-- do you mean a burner motor?- or a fan motor?-- or what "comes on"?

WHen you try to light the pilot, what happens?

D
o you know where the ThermoCouple (TC) is on this furnace/heater?

Here is a solution/suggestion I wrote on TC-- Maybe it will help?

~~~~~~~~~~~~~~~~~~~~~~~

One possibility is that the Thermo Couple is beginning to fail'
What is a Thermo Couple? (TC)
The Thermo Couple (TC) is a small Rod-shaped device with a couple wires coming out the bottom.
The TC actually generates a small electrical current from the heat of the Pilot.
This electrical current is sensed by the control board, or the Main Gas Valve.
As long as there is a pilot, it is safe for the Main gas valve to open, and admit the large amount of gas into the heating burner.

Now-- What helps this TC work the best?
It needs to be just at the edge of the pilot flame--- Not too much in the flame, or the resulting poor combustion of the pilot flame, results in soot forming on the TC-- which insulated the TC from sufficient heat.
Obviously the TC has to be clean (of soot) in order to receive enough heat, to generate the needed voltage to tell the valve that it is safe to open.
And age does deteriorate the TC-- some last a few years, but that is about the end of life for most.
Replacing requires getting down where the TC is, and with a screw driver (usually)-- loosening the bracket that holds the TC. Pay attention to where the wires are routed, and any polarity indicated on the old wires, and duplicate on the new one. Duplicate routing, and polarity, and position the new TC at the edge of the pilot flame.
Pilot flame is maintained by pushing some over ride button-- for a minute or two, until when you begin to release the button, you can feel that the voltage generated by the TC is now holding the pilot valve open, instead of your pressure on the 'start' button.

Any further Questions, let us know..

Mack B

Jan 26, 2011 | Air Conditioners

1 Answer

Carrier Weather Maker 8000 with 88,000 btu natural gas furnace lights and runs sometimes and other times it will light and then shut-off when the electric pilot turns off? Does this sound like a bad...


Hi, You say that it will light and then shut-off when the ELECTRIC pilot shuts off? If it has an automatic pilot ignition, it wouldn't have a thermocouple? It would have an ignition module with a flame sensor. Could you check this for me and let me know which one you have for sure? I can help you out better if I knew. Thank you and please get back to me.
Sincerely, Shastalaker7
Ps If it is electronic, there will be a flame sensor mounted next to the pilot. It has a ceramic body with a metal rod coming from the end.You can take a piece of steel wool not sand paper and clean the metal rod (sensor). The pilot flame will surround this keeping the burners on.After cleaning it, and if the pilot continues to go out, I would say that you're ignition module has an intermittent internal problem, and needs to be changed.

Oct 30, 2009 | Carrier XHB123D X/Y Series Heat/Cool Air...

1 Answer

I have a EVCON furnace DGAT070BDC. I replace the igniter control, the gas valve and the thermostat. Same problem continues: glow stick works, then the pilot lights works.The igniter control clicks...


You may have a dirty/rusty burner that is clogged or your gas valve
manifold pressure setting may be too low. Normal manifold pressure
is 3.5 inches water column on natural gas furnaces. ( 1 psig is equivalent to 28 inches water column). Pull and clean burner. Also
check and clean pilot assy. including flame sensor (if present).
Please let me know.

Oct 24, 2009 | Coleman Air Conditioners

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