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On a standing pilot furnace, when the burner fires it burns improperly. Seems like to high gas pressure, and blows out burner, and pilot. Tried to remove burner oriface, but does'nt seem to come loose. Oriface looks clean. Should i remove the oriface with a small pipe wrench(might do damage)or does this sound like a cacoon or something in oriface?

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That really is one you should have a pro look at.Impropper combustion can lead to carbonmonoxide.

Posted on Aug 26, 2008

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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...

1 Answer

Why heater coils glow?


It sounds like you're describing one of two things. The hot surface ignitor in a gas-fired furnace, or the resistive heat strips in an electric furnace.

The hot surface ignitor in a gas-fired furnace lights the burners. This ignitor in modern furnaces serves the same purpose as the standing pilot flame did in older furnaces. It provides the required heat to ignite the gas at the burners. Without an ignition source, a gas-fired furnace cannot provide heat. When the ignitor is activated it will glow bright orange or yellow.

The resistive heat strips in an electric furnace actually provide the heat to a home or building. When the furnace turns on, the heat strips are activated and usually glow orange when they reach peak temperature. In almost all cases, the heat strips are not easily seen or accessed without removing covers or panels inside the furnace.

Feb 28, 2011 | Air Conditioners

1 Answer

Furnace seems loud when burners ignite like a small "woof" didnt always do that seems to be something new. Checked all venting nothing obstructed. Had gas presure checked it is LP input is 10...


Depending on the age of the unit the gas pressures should be fine. The first thing I would do is to give the burners a thorough cleaning and make sure pilot is clean if so equipped. I would shut furnace off and remove the burners for easier and better cleaning. Use a wire brush to lightly clean openings on the burners,and gently tap inlet end of burners on soft wood block or thick cardboard pad to clean soot and rust from inside the burners. Also blow out with air if you can.
I always do one burner at a time and put them back in the order they were removed in. When you get everything back together and furnace lit then you can loosen retaing screws on air baffles if needed to get the best looking cleanest flame possible.Flames should be tight on the top of the burners with nice blue flame with sharparrow points with just a little yellow on the very tip.
I hope this helps you. Thank you

Jan 10, 2011 | Air Conditioners

1 Answer

Furnace


Hi, this is whats called delayed ignition. I have burned the eye brows and lashes off my face many times because of this. This is really something a repairman should look at, as raw gas is not igniting completely when the unit shuts off. In other words you have raw gas in the box that is igniting when the heater shuts down. This normally happens on a unit with a standing pilot.You may have a leak in the pilot tube if it is a standing pilot that ignites. You can do this, shut the unit down and check for any signs of leaks and clean all of the burners out. They will build up with rust flakes and cause the gas in the burners not to fire and shut off until last. Clean everything up really well and make sure panels are secure. Try it and if it continues, call someone out. This can be dangerous to you and your family. You can also call out your local gas company and say you smell gas when you use the heater. They will come out free of charge and then when they are looking it over, you can say what you just told me. They can take care of it. Even though you may not smell gas, they don't no this and will get rolling on this fast as this sounds like a gas leak!! This will be your best bet as it could very well be a gas leak. Keep me posted,
Sincerely,
Shastalaker7

Feb 21, 2010 | Carrier XHB123D X/Y Series Heat/Cool Air...

1 Answer

Delayed ignition of a Ruud high efficiency upflow 90 plus propane


It sounds like the first thing to do is have burners and pilot cleaned and adjusted so ignitor and pilot flame is close to main burner ignition rail.

The "whoosh" is due to delayed ignition because the pilot flame does not come in contact with main gas.

One more thing that should be tested is the gas pressure and combustable air mixture to be sure it is correct.

It is always best to have a qualified technician do this for you, In many areas the gas supplier with check and safety test this for you.

Nov 24, 2009 | Ruud UBHC Air Conditioner

1 Answer

Weak flame in intertherm furnace


Ok, so we can rule out the ignitor. (standing pilot systems can develop problems that will cause such symptoms.)

Check the gas pressure, make sure you are getting 11 to 14 PSI.

You need that after the regulator all the way to the manifold.

Also check for cracks in the heat exchanger, causing the wind from the blower to distort the flame pattern enough to cause improper contact with the flame sensor.

Make sure the burners and flame channels are clean of rust, and dibri build up, allowing the flame to properly contact the sensors.

Jan 18, 2009 | Intertherm P3RA-048K Air Conditioner

1 Answer

Rheem gas furnace pilot lights, but no burners or fan


If the burners do not fully ignite, the sensor will shut the furnace down. The lack of sufficient burner flame is a gas valve or gas pressure problem within the valve.
Replacing the gas valve with the original one may get you going. I surely suggest a professional service company for safety reasons and a thorough inspection. A 20 year old furnace is past it's normal life span.

Jan 06, 2009 | Air Conditioners

1 Answer

Gas boiler won't stay lit!


The burners and pilot need to be cleaned.
Turn off gas and power, remove the burners and pilot. Clean with a brass wire brush. (Steel wire can be used but very carefully) Remove all rust dirt etc. reinstall and it should fire right up.

Dec 28, 2008 | Ruud UBHC Air Conditioner

1 Answer

On a standing pilot, coleman gas furnace, when burner fires, the flame burns wildly on high burn. Could this be because the air adjusment is set incorrectly? In a short time it blows out the burner, and...


HEY J, this could be a dangerous situation. You could have a crack or rusted out heat exchanger, if this unit is over 20 years old, which it is because it a standing pilot, units are obsolite! This could be letting in CO2 ( carbondioxides-- poision gas fumes) n, Oklahoma, our gas co. will come out for free to give our units a CO2 gas fume check anaylsis. Check this out before someone dies or ill repairable damage done to the body! Thank-you-very-much!

Aug 30, 2008 | Coleman Air Conditioners

10 Answers

Intertherm furnace problem?'s


the blower on my furnace keeps going on and off when i turn the furnace on .ichanged the snapdiscs no change changed thermocoupler and therostat still no change whats my problem

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