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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Newer furnaces do not have a pilot light. If yours does, you will have to relight it. Find the gas valve inside the furnace and follow the lighting directions. Generally, you turn the valve to the pilot position, press a button and hold it while you light the pilot. Hold it for about a minute and then release. If the pilot stays lit, then you can go ahead and set the thermostat to call for heat. If it does not stay lit, or the furnace still will not light, I think you need to call a repairmen or someone with knowledge of how to troubleshoot the problem.
Check the pilot lt. If its out shutdown your furnace and call a repairman. If the pilot light is on, the flame sensor might have gone out. It's a long silver sensor that sits in the pilot light flame and senses when the flame is present. If it isn't working the furnace will automatically shut down.
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:
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.
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
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:
Remove any cap covering the pilot adjusting screw on a combination control.
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:
Hold the control knob to
pilot and light the pilot as above.
Unscrew the thermocouple fitting with an open-ended wrench.
Set a multimeter to the DVC (lowest voltage) scale.
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
If the multimeter shows a reading besides zero, the thermocouple is functioning. Replace the thermocouple tube.
If there is no reading, you will need to clean or replace the thermocouple following steps 7 through 11.
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.
Remove the thermocouple from its mounting bracket.
Wipe the combination control clean and install a new thermocouple,
tightening it by hand, then give it a one-quarter turn with a wrench.
Insert the thermocouple into the pilot bracket, being careful to not crimp the tubing.
Turn on power to the furnace and relight the pilot (above).
Adjust an adjustable burner air shutter:
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.
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:
Shut off gas and power to the furnace.
Unscrew or loosen and remove the tubes from the supporting bracket.
Carefully clean the tubes with a brush or vacuum, making sure not to damage the burner ports.
Use a stiff wire to clear any debris from clogged ports.
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.
So are you saying that the first initial lighting of the pilot, without turning to on, works o.k., good flame etc, ? If not sure, try lighting pilot only, and leave setting at pilot only, and see if it's a good flame, and get back to me.
First thing and this is very important turn the thermostat off. When you are in front of your furnace remove the top cover to expose the burners and pilot light. You will see a gas valve that has a knob, lever, or some kind of switch on top of it. It will have off pilot and on in raised letters on top of it. Now move the knob to pilot position and if you have a long lighter or maybe fireplace match something long enough to reach back into the unit about 10 inches or so. Depress the knob hold down reach back with lite match, lighter and get close to pilot and there it will lite. Hold knob down for about 30 seconds and let go. Did the pilot stay on? Good if it did. Turn the knob to the on position and go to the thermostat and turn on the furnace. Now if you are nervous about lighting the pilot light you could call the gas company in your area and explain your situation and they should come out and do it for free. let me know how it turns out. ken
Relighting Your Furnace's Pilot Light
Turn off the gas at the main valve at your utility box
Wait five to ten minutes for gas fumes to waft away
Get a long match—yes, a fireplace match, not a standard match
Set the gas valve on your furnace to "pilot"
Press the red button as you hold the match to the pilot valve
Keep pressing the red button for 30-60 seconds so the pilot can heat the
thermocouple. Release the button and see if the pilot remains lit
If pilot goes out, wait five to ten minutes and repeat the process
Once the pilot stays lit, turn the main gas valve back on
If the pilot light continues to go out, call a technician, who may need
to adjust or replace your thermocouple or adjust your pilot