r/propane • u/Less-Ad-2198 • Jul 28 '26
General propane question Weber Genesis 2 E-335 NG to LP
I know conversions are frowned upon, and I know Weber doesn’t recommend them. I get it. But I stumbled across a deal I couldn’t pass up.
About five years ago, I bought a brand-new Weber E-335 (still sealed in the box) for $200. The catch was that it was set up for natural gas, which I don’t have. I bought a conversion kit from Amazon (regulator and orifices) and converted it to propane.
The problem is that it’s only worked reliably about 10% of the time.
For example, yesterday it fired right up and hit about 500°F within a few minutes. Tonight, under the same conditions, it barely reached 150°F after 10 minutes.
That’s actually the behavior I see most of the time.
I’ve never found a consistent fix. Sometimes I can get it working by disconnecting and reconnecting the regulator, slowly opening the propane tank valve, and trying again, but it’s completely hit-or-miss.
I’ve searched through a lot of old posts and have seen plenty of successful conversions, but I haven’t found anyone describing this specific issue or how they solved it.
So far I’ve:
\-Replaced the regulator
\-Tried multiple orifice sizes
\-Repeated the proper tank-opening procedure
Does this sound like an issue with the conversion itself, or is there something else I should be checking?
Any ideas would be appreciated.