Gas pressure problems


 
E

Erick Graham

New member
Hello all. I recently bought a genesis e310 from 2007-2010 with the side controls and am having problems with the gas pressure it seams. The grill will only heat up to 250-300 degrees. I have read about the regulator going into bypass mode and have followed the directions for start up and tried them multiple times with no change. The regulator is the only new part I put on the grill as it had an aftermarket regulator on when I bought it. I tore the grill all the way apart cleaning everything. I cleaned and lubricated the valves. I believe the problem is upstream of the burners because I took the manifold out to check if the orifices were blocked and ran gas through them and could hear the pressure drop when I opened additional valves. I did try the regulator off my current grill which is not a weber and experienced the same problem. I checked for leaks with an electronic leak detector and could not find one. Any ideas on what to try next?
 
It could be the thermometer on the lid is not working.

I suggest testing it. Remove it and put the tip in boiling water to test it reads 212F
 
Just checking.... Does the grill have the round cut out in the floor and the hole on the right side to get the hose to the manifold. Also, you should have a tank scale inside the cabinet. If so, it is a propane model. If it doesn't have those features, then it probably is a natural gas model. There should be a sticker on the grease pan bracket with the serial number on it. Hoping you didn't get duped with a conversion done wrong. If your manifold is supported by a cross bracket (front to rear on the right side) and a ignition box in the firebox it will be a 2007 model. If it has wings built on the manifold and the igniter attached to the front burner it is a 2008-2010 model.
 
One other easy thing to try is a different LP tank. I had a rehabb grill earlier this year that would not heat up. I finally swapped in a different LP tank all was good. I don't know what it was, because the LP worked fine on other grills.
 
I have two surface thermometers that I put on the grates and they were about the same temp as the hood thermometer. I will try to get some pictures tonight when it is dark out to better see the flames. There is a drop in the flame height of the first burner as soon as I open the valve to the second burner.
 
It does have the holes for the tank and hose and the tank scale. The serial number is washed away and unreadable. I did try two different tanks to no avail. It is a 2008-2010 based on that.
 
Is it possible someone was messing around with the orifices? Did it exhibit this issue before you took the valves apart?
 
LMichaels said:
Is it possible someone was messing around with the orifices? Did it exhibit this issue before you took the valves apart?
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The grill had a higher pressure regulator so the flame was way too big with it. It put out something like 5 psi. I took it apart and cleaned everything before I bought the new regulator. I have looked and can not find what the orifice size should be anywhere.
 
Erick. Find a 3/64" drill bit. If the shank fits inside the orifice, it is a NG orifice. If it doesn't quite fit, it is a Propane orifice. I don't know the exact sizes however.
 
Bruce said:
Erick. Find a 3/64" drill bit. If the shank fits inside the orifice, it is a NG orifice. If it doesn't quite fit, it is a Propane orifice. I don't know the exact sizes however.
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Trouble is Bruce his issue is the opposite of what would happen if NG orifices were used on an LP grill. Yeah, 5 PSI?! Holy S&*T that thing must've looked like a volcano
 
I realized that after I posted it. If nothing else, maybe pushing something through the orifices might clear them out if there is some kind of obstruction. Also, make sure the spider guards are clean on the burners.
 
It was a little scary, the flames weren't too bad but it sounded like a flamethrower. I will check the orifices next. The last two pictures one is high one is on low. There is a noticeable change in person even though the pictures look similar.
 
Erick Graham said:
It was a little scary, the flames weren't too bad but it sounded like a flamethrower. I will check the orifices next. The last two pictures one is high one is on low. There is a noticeable change in person even though the pictures look similar.
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It bothers me that you don't have flame all the way across the crossover tube on the left.
 
I have witnessed that with XOver flame propagation on occasion myself but not quite to that degree. The burner flames actually appear quite normal to me though. Are the burners new? OEM? If original have they been fully cleaned inside and out? Proper flame propagation on the XOver depends on how clean and properly burning the main burners are.
 
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