Heil furnace s8610u

How to Light a Furnace Pilot Light Here, we'll explain the basic steps for re-lighting the pilot light of a gas furnace.

#1: Locate the Instructions Label on Your Furnace

Every furnace should have a label on it that tells you how to light a furnace. Sometimes, however, the printing may be small or the furnace area may be dark. In these cases, the label may be difficult to read. Keeping the following instructions near your furnace or in another safe spot where they can be located easily will make the task much easier.

#2: Find Pilot Light and Components

Near the bottom of your furnace is a switch that normally says "Pilot," "On" and "Off." Find this switch and turn it to the "Off" position. Wait at least five minutes. This is important because it gives the gas time to dissipate, which is necessary to avoid possibly starting a fire. While you are waiting, take note of the location of the reset button, which should be near the dial you just turned to "Off."

#3: Re-Light the Pilot Light

Once the gas has had time to dissipate, turn the knob to "Pilot." Then, hold down the "Reset" button and bring the flame of a long lighter close to the pilot light opening. This should light the furnace pilot light. Once you are sure the pilot light is on, release your pressure on the reset button.
Sometimes, seeing a job bein

Probably your flue isn't clear enough.
Try blowing it out, you might have to remove a cover to do it.
Otherwise it may be the flue passage detector needs replacing.

Make sure the thermocouple is clearly in the heart of the flame. Make sure the thermocouple is securely and properly connected to the gas valve. Obviously make sure it is the correct thermocouple. Gas valves do go bad, so it could be that but that is fairly rare. Good luck.

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. 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.

grainger.com will have one. It may have been updated to a S8610U.

Remove the cover from the control box,there's a guide posted inside to trouble shoot the codes.

The gas valve is bad and this is a common problem for these furnnaces. I have the same problem. Let me guess its a DC90?

if it has a pilot, you can follow the pilot tube from the gas valve back to the burner assembly and find it. It may not have one and if this is the case, the air flow switch is supposed to close when the inducer fan comes on . If the flue is clogged, condensation in the bottom of inducer fan(would hear cracking). then after the draft safety switch is closed,the gas vavle will get 24 volts and allow the gas valve to open

The problem might be with your safety switches other than you gas valve poilte

recommend getting a carbon monoxide indictor or having some one test it. with it being over 15 yrs old if checks good replace ignitor assy should fix it ok