“Why fix it yourself if it’s under warranty? Just don’t use your propane in the meantime.”
Normally that would be the right answer, and I’ve done that with cars and back when I bought a new house. However, with RVs it’s a bit different and is more like getting repairs on a Tesla, where you have to be patient, very very patient, as parts can take a very long time for the dealer to obtain - so often it’s better to simply fix yourself, or in this case, only use the propane for cooking and shut it off at the tank when not in use.
I’ve owned an RV for years and years. Camped out in some pretty extreme temperatures once in a while, but I can only remember one time going to sleep with the propane heater on. It just made me nervous.
Most of my RVing is done at RV parks and state parks. With electricity. So why use propane when you can plug-in a little electric heater and be roasty toasty all night without fear of a propane leak?
One time the family and I were camping at the beach. Have you ever tried to light a gas furnace with 20 mile an hour sustained winds? I finally got that pilot lit. Shortly there after I bought an electric adapter for hot water purposes.
I am just not a fan of propane.