SOURCE: The pilot light blows out every time the main
it's the thermocoupler ( about $20 ) that is bad replace it. if that doesnt do it it is the box with the on/off/ pilot button ( about $175 ) I found a complete unit at www.americanrvcompany.com for $275 plus shipping ($300 total) and that is how i fixed the exact problem with mine.
SOURCE: I have a 1999 Atwood
Look real close up where pilot tube is attached at fitting at burner end, and you will find a small pinhole on side of fitting. Use a paper clip, or similar, and poke it in that hole and work it around a bit to clean out any debris, or small spider web that may have collected in there. That's basically your intake air for your pilot, and when plugged it will cause a yellow weak pilot flame. Best option is to blow compressed air into that hole if available. That should get pilot burning blue again. Then,when cool, Clean off thermocouple end that sits above pilot flame as well with fine steel wool, or a small wire brush to allow it to sense flame better as it probably has gathered some soot on it now. Once that's all good, try lighting heater again, and see if that doesn't cure it. Be sure to adjust air shutter on burner so that flame is nice and blue, with just a little hint of yellow at tip. You want best/bluest flame, but not so much that it roars like a lion and jumps off the burner. Quiet but blue as well. If pilot was yellow and weak, and burner was roaring, it will draw flame from pilot , away from thermocouple, thus thermocouple cools too much and shuts down gas.
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