Question about Carrier XHB123D X/Y Series Heat/Cool Air Conditioner

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How do I relight Pilot for a Model # Carrier 58GP100-3 Furnace?

I decided to save a teeny bit of money last spring by turning off the pilot light to my furnace knowing I would need to relight it when it turns cold which it now has. The furnace is 30 years old, made in 1978 by Carrier, Model # 58GP100-3 is sort of a blue color on the outside and when I take the top front panel off, I see the Plennal chambers and there is a control for OFF--ON--PILOT etc. I don't see a logical place to hold a flame to light it and I don't know a specific procedure. My dad is an engineer and growing up (Im 44 now) he would have me watch him when he lit our furnace and I've lit one for a water heater while I rarely do this, I feel I know some of the basic precautions.

I think this was likely a common furnace in the 70s and I wondered if anyone could help me out with some steps or an idea where to hold the light. It's 59 in the house this morning and I figured that's about as cold as I want it to get inside as I'm stubborn enough to tough it out to keep bills low and I am single and live alone.

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Rightside to the right of the last heat chamber.

Posted on Oct 13, 2009

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As the unit is very old there is no specific manual available for it to guide you but i will give u some link for extra help.

Posted on Nov 22, 2008

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2 Answers

The 2 flashes on the screen and the furnace will not turn on. The 2 indicates the time frame program which is correct but why flashing? Owners manual does not address.


I had two flashes on a Honeywell 8670 continuous retry controller to my Burnham power vent natural gas furnace.In my furnace the two flashes meant the last attempt at starting failed and it was going to retry in 90 seconds.

In my case the furnace actually had two intermittent problems with similar codes. The first issue was the high voltage pilot light cable was also a combination flame sensor wire. The cable was supposed to clamp on to the pilot assembly like a spark plug wire.

When it was installed the clamping bits were too far apart and some fool decided since it wasn't sticking he would glue it on. This worked initially, but later the connection was only good enough to pass the high voltage not the low current DC signal back to the controller indicating the flame started successfully. Flames conduct a small amount of electricity due to ionization and the controller senses this.

I pinched the clamping bits together with some pliers. Then it fit tight and kept working.

Other reasons for the 2 flash code on my controller might be no gas or pilot light failure.

My other problem was a partially failed capacitor on my power vent motor caused the vent fan to run in reverse on say one in one hundred start attempts. Once it started running in reverse it wouldn't run forward without stopping it completely, which took several minutes of off time. The capacitor was available quickly and inexpensively from McMaster Carr.

Jan 10, 2015 | Air Conditioners

1 Answer

Furnace and pilot will not stay lit


The tube is gas supply for pilot. You have to make sure the thermocouple is in the flame at least half way and make sure its tight in the gas valve. There should be a small silver plug on the gas valve near the pilot supply tube. You can pop the cap and adjust the height of the pilot flame a little. Can you tell if it has a flame rod in or above the flame? If it does You can remove it and clean it with steel wool.

Mar 24, 2014 | Intertherm P3RA-060K Air Conditioner

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I have a ruud central heat and air unit outside the heat runs of natural gas and the air is electric but every time I turn the heat on it blows cold air what can I do to fix this with out costing me a lot...


Your unit is not firing or staying lit. It could be a safety or gas valve problem. It the unit has a standing pilot light check that it is lit. The should be instructions inside the panel on how to relight the pilot for your unit. Some safety's are manual reset like flame roll out switches they have a small button on them. push this in if it clicks it was tripped. If the problem persists call for a trained tech and do not mess with gas beyond what you are comfortable with.

Nov 13, 2013 | 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.

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1 Answer

Once I press the button to start the heater must wait a good 30 seconds or more before it stays lit when button is released.


That's normal. It's the correct way to allow the the Thermocouple and/or Thermopile to fully heat up.
If you have been turning the pilot light OFF after each use and then relighting it when you want to use the heater, that's really not necessary. Leaving the pilot lit during the heating season is a better way to go. If you think you're saying gas by turning the pilot light OFF and then relighting it again, when you want heat, you're really not saving a significant amount of gas or money. The pilot burning continuously, uses very little gas.

Hope this helped you. Please let me know. Thanks

May 16, 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.

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1 Answer

My carrier furnace pilot will not light...what to do?


If this a 3 wire pilot replace it. If this is a standing pilot you need to replace thermocouple. Any other type ignition let me know and I will follow up with you. James

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1 Answer

Heating isn't working, can't find the red button to relight the pilot


Many times the knob to turn the gas on on the valve is also the pilot knob. Turn it to pilot and hold it down while you light the pilot. Hold it for up to a minute and release. If the pilot stays on then turn it to on. If not you need a new thermocouple.

Apr 26, 2009 | Air Conditioners

1 Answer

I have forced heat and I came home today and its not working. Could this be a quick fix?


it can be if you know how to relight a pilot which it sounds like yours may have gone out.you have to go to the furnace and find the red button and turn it to pilot press down and light it hold it down for about a minute and then let up and turn to the on position and then go set your thermostat to where you want it to be set at.

Jan 13, 2009 | Air Conditioners

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