Rheem Furnace problem

[tbonebilly]

I have a Rheem furnace with 5 inshot burners in it. Sometimes only the burner on the far right comes on and after about 5 seconds the unit shuts down then the fan only runs. I have checked and cleaned the crossovers and aligned the burners and checked the gas pressures into valve 12"wc and out is 11"wc. can anyone help me, this is frustrating>

[tinner73]

12" wc?

[tbonebilly]

12"wc is 12 inches of water colume gas pressure on LPG

[hvac hero]

did u check the orfices to make sure a spider web didnt clog up the 2nd one?

[jvwinn]

How many volts do you have at the gas valve?

[comfortdoc]

Shut the furnace of and call an experienced service tech to test and diagnose the system. This can be very dangerous especially with LPG.

[docholiday]

Why did you set it up for 11"? (I realize it's LP) Did you read that in a manual somewhere? 'Cause it isnt anywhere in the manual for your furnace.

[doublevision1]

CHECK ORFICES AT BEGINNG OF BURNERS TAKE THEM OUT AND CHECK FOR SPIDER WEBS INSIDE

[tbonebilly]

Manual says 12-14 inches water colum.

[docholiday]

inlet maybe, not outlet.