Removed burners for cleaning, flame erratic

Clean the flame sensor with some steel wool see if that helps . Also check the pressure switch and see if air filter is clean

Remove the front panel to find where the gas injectors enter the burner tubes you will see they are cut away and have a screw holding an outer ring which is adjustable, open them up more to get more air in .

This sounds like a flame proving fault, so what's more than likely happening is the unit isn't sensing the flame. You'll see a small metal rod sticking down infront of the burner on the opposite side as the ignition source. Remove that rod, and clean it with some scotch bright. If you know how to work a volt meter you can test this part. Take the wire off the flame rod, place your meter leads in series with the wire and flame rod and set it to micro amps DC. Fire the unit up, and when your main burner lights you'll want to see a minimum of 1micro amp DC. If you're getting a higher reading than that and it still cycles I'd be suspicious of the grounding of the burner, or the ignition control! Good luck, let me know if you need any more instruction!

see this causes and fix it. God bless you
f there is no heat, check the electrical service panel for a burned fuse or tripped breaker. Relight the pilot light (see below). If there is not enough heat, adjust the burner air shutter (see below); and clean the burner ports (see below).
If the pilot light does not light or does not stay lit, clean the pilot orifice carefully with a toothpick, test the thermocouple and replace it if it is faulty (see below).
If the flame flickers, adjust the pilot (see below).
If there is an exploding sound when the burner ignites, adjust the pilot to a higher setting and clean the pilot orifice and the burner ports.
If the burner takes more than a few seconds to ignite, clean the pilot orifice and adjust the pilot light.
If the burner flame is uneven, clean the burner ports. If the burner flame is very yellow, clean the burner; open vents in the furnace room to provide more air; adjust the burner air shutter.
If the furnace makes a rumbling noise when the burners are off, clean the burner and adjust the burner air shutter.
If the air is too dry, wash or replace the evaporator pad if you have a humidifier; test the humidistat; and adjust the water-level float to raise the water level.
If some rooms are too cool and others too warm, the distribution system may require balancing. Refer to the Forced-Air Distribution Fix-It Guide .

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.

see this steps and fix it. God bless you
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If there is no heat, check the electrical service panel for a burned fuse or tripped breaker. Relight the pilot light (see below).
If there is not enough heat, adjust the burner air shutter (see below); and clean the burner ports (see below).
If the pilot light does not light or does not stay lit, clean the pilot orifice carefully with a toothpick, test the thermocouple and replace it if it is faulty (see below).
If the flame flickers, adjust the pilot (see below).
If there is an exploding sound when the burner ignites, adjust the pilot to a higher setting and clean the pilot orifice and the burner ports.
If the burner takes more than a few seconds to ignite, clean the pilot orifice and adjust the pilot light.
If the burner flame is uneven, clean the burner ports. If the burner flame is very yellow, clean the burner; open vents in the furnace room to provide more air; adjust the burner air shutter.
To 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.

Hello, sounds like the flame sensor needs to be cleaned with steel wool. The flame sensor is a metal rod located on the opposite side of the igniter that senses the burner flame and will keep the Furnace running, what happens is the rod builds up oxidation and then cannot sense the burner flame and will shut the burners down and keep repeating. Just remove the sensor and clean with steel wool and reinstall.

From what you described, the burner needs to be removed and cleaned and the air shutter adjustment needs to be readjusted. After cleaning and replacing the burner, you can light the unit and then start adjusting the air shutter, until the flames are blue with yellow or orange tips.

Hope this helped you.

I think you husband is trying to clean the wrong thin. The venturi tube is part of the burner itself. It's the open end of the burner, that has an air intake adjustment on it. It fits over the burner orifice. He may be hitting the orifice, which in fact may be clogged. Remove the offending burners and he will be able to see the burner orifice, which can be removed with the appropriately sized wrench. Once removed try blowing through it. If air doesn't blow through, it's clogged. Clean it with a straight pin that is no larger that the orifice hole. You do not want to enlarge it. Also, the new burners may need adjustment of the venturi for the proper air to gas mixture. Consult you Owners Manual on how to adjust it.

Need an Owners Manual? Go to http://www.brinkmann.net/my_grill.aspx and enter the Model Number of your grill.

Hope this helped you to solve the problem. Please don't forget to rate my response to you. Thanks!