see this steps and fix it. God bless you
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
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:
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.