suburban sw6de hot water heater

Biscuit, Thanks. The coils ohm out to 43+ and 45+. Removed the burner tube and it was PACKED. Cleaned it out and it again sounds like a small jet engine. Working great.

Thanks. Will check it out.

YEP what he said ^^^^^^^^

Something is obstructing propane flow. Doesn't take much.

Either main orifice (screwed into gas valve right where burner tube connects) is dirty or main tube is dirty

IF after cleaning it still has a low flame then may have one of the two solenoids on gas going bad. Typically inboard one.

Can check that both are getting 12V DC power during ignition.
OR unplug wires on solenoids and check resistance...should be 44 ohms

Check for a spider web partially blocking the burner.