12 replies to this topic

[dan-c]

Is it advisable by you learn'ed ones to replace the center burner orifice on my LG stove (and what general size)? It simply does not get hot enough to cook/sear properly on. If I place the griddle to one side or the other I get enough heat to cook steaks or whatever but not the center burner (which I 'thought' was its purpose).

Thanks!

[Samurai Appliance Repair Man]

Model  number?

 

Usually, the metering hoods can be removed and cleaned.  

[dan-c]

Model  number?

 

Usually, the metering hoods can be removed and cleaned.  

It's an LG LRG3091ST only about 6 months old and it's all clean. The brass orifice looks small compared to all the other burners except the tiny warming burner.

 

My question is can I replace the center one with an orifice that passes more gas :)

 

The burner covers (metering hoods?) seem to all have the same size holes too

[john63]

<<<It's an LG LRG3091ST>>>

 

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A General Electric-built range---sold with the LG logo.

 

Remove the center burner knob

 

With a small/bright flashlight---look into the burner valve *shaft* (that the knob attaches to)

 

You'll see a tiny screw inside the burner valve shaft

 

Find a screwdriver small/long enough to turn the flame-size-adjustment-screw *counterclockwise*---while the burner flame is on.

[KurtiusInterupptus]

I believe that the screw inside the knob shaft is for adjusting the low simmer setting....
It wont have any effect on the high setting.

You didnt mention what gas you are on. Has this range been converted?

[john63]

<<<I believe that the screw inside the knob shaft is for adjusting the low simmer setting>>>

 

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Correct.

 

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<<<It wont have any effect on the high setting.>>>

 

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It does---but not much.

 

Many owners of LG gas ranges often ask if the flame size can be made "larger".

 

 

[KurtiusInterupptus]

I guess your right John... I certainly get a lot more complaints about "can't simmer" than "not big enuff"...

Still, might be good to see if the orifice is the correct size...

[john63]

<<<Still, might be good to see if the orifice is the correct size...>>>

 

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I agree...

 

Orifice size is determined by a letter stamped onto the orifice:

 

NATURAL GAS

 

LF:  C

LR:  D

RR:  G

RF:  H

CTR:  D

BROIL:  A

BAKE:  B

 

LP GAS

 

LF:  L

LR:  M

RR:  P

RF:  Q

CTR:  M

BROIL:  D

BAKE:  F

 

[dan-c]

It is and has always been natural gas. The spec's say the center burner is good for 9100 BTU while the LF is 12000 and the RF is 17000. I think 17000 is too much, I guess I'll change the orifice to the 12000 and hope for the best.

 

Since it's GE made (ugh, had I known that  ) I suppose the GE spud nut orifices will work?

[certified tech group 51]

Change which orifice??..........The   9100 BTUH ??.........or the 17000 BTUH ??..........The gas valve may not be correct for the replaced orifice..............You are not going to change a part that well  paid, highly trained  engineers have perfected for you, are you????

[dan-c]

Change which orifice??..........The   9100 BTUH ??.........or the 17000 BTUH ??..........The gas valve may not be correct for the replaced orifice..............You are not going to change a part that well  paid, highly trained  engineers have perfected for you, are you????

 

Welll, ummm, err, I was going to change the center burner 9100 to a 12000. If it's not as simple a matter of replacing ill or low performance designed motorcycle or auto parts that well paid, highly trained engineers developed I guess not.

 

If I want more BTUH to make my cast iron center burner griddle more useful than a warming rack without causing harm, why yes, yes I am

 

Gas valve? Dang, always a curveball

Edited by dan-c, 15 January 2013 - 12:26 PM.

[kdog]

Not to mention potential risks when modifying operation design

[jb8103]

The gas valve should be delivering X cu. ft. of gas at Y pressure. The larger the jet, the faster the the stove goes.

 

Err, wait a minute - it's early...

 

Anyway it will deliver 9k BTU here from this orifice and/or 17k BTU there from that orifice and so on up to the full volume capacity of the valve. One cu.ft. of natural gas provides about 1000 BTU.

 

But really there are two valves involved here, the supply valve and the control valve. Does the control valve for the center burner have the capacity to go full tilt flamethrower?

Edited by jb8103, 16 January 2013 - 06:01 AM.