Can I use science goggles to play airsoft?
Just because it's a new car don't mean it can't be fitted with faulty parts in the factory. Because it is a new car it is under warranty and you should take it back to the dealers. They will inspect the problem and if anything is wrong they will fix it and it will not cost you anything.
Personally I always use a small propane torch to warm poly pipe for fittings, of course don't over heat, it sure beats fighting with it. I've been doing it that way 18 years with no problems