Can you light your stove? If you cannot it is a problem with the gas. If you can, it is probably a problem with the furnace. I always light my stove before I try to light my ref ridge or furnace. One easy problem to fix (I always check those first) is there is a flame protector just above the gas flame that protects the flame from wind. On one of my coaches, it had not been tightened correctly and fell down snuffing out the flame. Cost me $100 to find out I could have pushed it back up and tightened the screw.
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