Hello, i have looked into the problem and have come up with a fix for mine at least. take out all the trays, and peer into the rear. you will see a silver section which has three srcews. remove the centre one to get access to the burner which has the white igniter on it. this just slips sideways and off. with the aid of a small mirror you should see a small brass nut where the gas comes from. there is a small pinhole in the centre,mine was slightly blocked and this reduced the flow of gas. i cleaned this with a pin and the gas flow improved. i am not an expert and take no responsibilty if it goes wrong. it appears to have worked for me so the choice is yours.
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My name is Peter. I am a retired field service appliance technician.
What bothers me is that changing these components increased your flame size?
1.) Make sure you have the correct gas safety valve. These valves are preset to inches of water column.
2.) The ignitor has nothing to do with your flame size. What happens is the oven thermocouple controls your oven temperature. When your oven get about 40 degrees above the set temperature, the ignitor and controlling gas components will shut down. When your oven temperature falls below the set temperature the ignitor and gas components will turn back on. There are ovens called accurate, which are expensive and do not have a 80 degree swing.
3.) Ok. Gas regulator. It is adjustable. Generally you have about a 7" water column pressure going into the regulator and 1" to 4" water column pressure coming out.
At the top of the gas regulator you have a long stem. Inside this stem is a shaft with a spring at the top and a valve at the bottom. In between is a rubber diagram which controls the valve based on the gas inlet and outlet pressure.
4.) Adjust. Turn the gas supply off to the range. Turn on the oven and gas burners to bleed the gas from the system.
There is a slot at the top of the stem. With a flat head screw driver, turn the stem top 1/8 of a turn counter clockwise to reduce the regulator outlet pressure. Turn the gas supply back on to check the flame. You may have to repeat this process to get your desired flame.
I assume you have already checked the gas supply by turning on a burner on top.
Do you smell gas when the oven first tries to light? If the flame sensor isn't picking up a fire on the oven burner within a
few seconds after the igniter is supposed to start firing, it will shut
off the gas valve. The first thing to check is the oven igniter. Can you hear it sparking (repeated snapping sound until main flame starts)? The sound may be drowned out by the fan, so hearing it would only verify that it's making sparks; not hearing it doesn't tell you anything unless you were able to hear it before the problem started. If you had a major spill in the oven recently, it's possible some residue made its way to the igniter or pilot flame tube and is gumming up the works.
The next items to check would be the oven gas valve and thermostat.
Hi If it won’t fire then it is possible that the oven control is not sending gas for the pilot light. The pilot light works but no main burner ignition - possible pilot assembly is dirty and the pilot flame is too small, safety valve and thermocouple is faulty, the bulb from the safety valve is out of position and the pilot flame is not touching the thermocouple bulb. Some ranges use a standing pilot light ( small flame is on all the time ) while others use an spark ignition to light the pilot light flame and the pilot light flame heats up the thermocouple bulb to allow the main gas to flow through the oven burner. The flame needs to heat the bulb up enough to tell it to open the gas valve. Several things can go wrong here that keep this from happening: The pilot flame may not be hot enough, usually because the flame is yellow instead of pure blue or is too small. The cause for this is usually a dirty pilot assembly. The pilot assembly would either need to be cleaned or replaced. The thermocouple bulb may not be positioned properly in the flame. You can't heat the bulb properly if it's not in the pilot flame! The thermocouple bulb needs to be in the upper third of a pure blue pilot flame--that's the hottest part of the flame. The thermocouple itself may be burned out. It happens. It's an internal part of the gas valve so, no, you can't just change the thermocouple bulb separate from the gas valve. But when you turn on the oven or the thermostat calls for heat, the pilot flame gets bigger and jumps down so it can heat up the thermocouple bulb. This extra gas to increase the pilot flame size comes from the thermostat. If the pilot flame jumps upwards or just gets bigger, but doesn't shoot down, then you need to replace the pilot assembly. If the pilot flame size does not increase or jump down when turning on the oven thermostat, then the problem is the thermostat not sending enough gas to the pilot assembly. It's also possible that the pilot gas supply tube has a hole in it somewhere. One final point on the spark-assisted pilot ignition systems. The spark comes from the spark module--the same module that sends spark to your surface burners to light them up. If you're not getting a spark when you turn the oven on, then there are several possibilities: There could be a problem with the switch in the thermostat. You can confirm this by doing a simple continuity test of the thermostat contacts. If you don't read zero ohms when you turn the switch on, replace the thermostat. The spark module could be bad. You'll need to measure the voltage at the oven terminals of the spark module when you turn on the oven. If you get 120v but no spark, it's probably a bad spark module. Replace it. Could be a bad spark wire or broken electrode. Please do rate the solution and revert for further assistance. Thanks Rylee
Turn on the gas knob for the oven (below the grill) You will see an ignition button below the one that switches on the oven light,it is clearly marked. Press in and hold the gas knob and press ignite button,you will see the safety bar flame light,when the safe to operate temperature is reached,the oven will stay lit after you release the gas supply knob. Set oven temperate guage (gas mark 4 is approx electric 200 degrees,thats all there is too it Hope that helps firstname.lastname@example.org
Flame saftey device control valve stuck in open position that why main gas is coming other wise flame should be max 2cm long after flame saftey device heat up and bellow expand and main valve should open