Left Patio Heater out for winter, now won't ignite
It could be just a blockage in the pilot assembly, you have to take the head apart to find and clear the blockage. While you are in there you check for a blockage in the main burner orifice as well. If it is just a blockage, then you don't have to replace anything.
If this doesn't get the gas flowing, try replacing the regulator.
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