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No flame on left side/main valve. Right side lights, flames up

\015 \015\012Unit element will ignite, \015\012gas on right valve will ignite, flame up and blow\015\012left valve/gas will not ignite or flame up\015\012Unit then shuts down\015\012\015\012Have tried reset and cleaning flame sensor on left side\015\012Does not appear gas is coming out of left side.\015\012Checked valve nozzels, seems clean/clear\015\012The main gas valve is a Honeywell VR8205H 8016 - \015\012at least 15 years old\015

Answers :

Try taking out the orifice on the burner that is not lighting and make sure it isn't blocked.

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