Atwood water heater

[bodatiouskid]

Having problems with water heater.It has an Atwood control unit.
When I light the burner,it will run for around 30 seconds & then unit will click & flame goes out.Tried about 8 times & always did the same thing.
Do you think it is air in the line,or something in the unit?
THANKS

[Gene]

If the burner runs / burns for 30 seconds with a good blue flame it isn't air in the line. The click would be the gas solenoid shutting off the gas. Could be the control unit doesn't sense the flame and shuts down.

Is it a pilot light type burner or a DSI (Direct Spark Ignition) ? A model number would help.

[bodatiouskid]

It's a GC6A-6 with a pilot light burner.The pilot looks like it's burning rather small.Sometimes when I turn knob to light burner,pilot goes out.

[bodatiouskid]

Found what wrong with electric side.When I place the metal box that holds the on/off switch,It grounds on heater & blows fuse.When box is off,heater works.Like switch is grounding out.