This can happen on excessively windy days or nights.
Pilot light goes out on wall heater.
A leak in the output duct of the furnace could cause air to blow into the area.
The flame will go out if the tube is clogged with dirt or debris.
If your pilot light re lights easily after going out overnight it s possible it was blown out by a draft.
5 improper air flow or a strong draft blows the pilot out.
Sometimes the tube might be partially clogged and supplying very little gas for combustion no wonder your pilot light keeps going out.
Another cause of a weak pilot is a faulty.
Thorough cleaning should do the trick.
Once the pilot goes out on a gas heater then it needs to be relit but it s best to do safety checks and go through a ritual before relighting the pilot.
Pilot goes out the heater won t operate properly if the pilot flickers is too weak or goes out and the cause could also be blockages in the pilot tube.