Nice blue flame to start with, but starts blowing away from the pilot orifice as unit gets hot.
Call a gas fitter for the repair
could be a freezing of the gas because of a blockage that is restricting gas flow
gas is not a diy repair
Testimonial: "Thanks, but why does it only blow out when the heater gets hot? Could it be water somewhere in the line? At any rate, I will indeed get the propane company to come take a look. Thanks again,"
gas under pressure freezes at the point of expansion so at the jet it will be relatively cold
gas does carry a percentage of water vapor so it is possible that at or before the jet in the line there could be ice forming and restricting the gas flow
discuss it with the gas man
an example of what I am talking about , many vehicle air conditions for a period of time actually used lpg ( propane) as the active cooling agent but it was phased out because of the vehicle fire risk when the condenser was ruptured and the gas was allowed to hit the hot exhaust system
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