Converting to gas from propane

[thepoolman1]

If you have a propane Laars LX heater, it came from the factory set up to use propane and no other fuel. Your installer did not keep something that belonged to you. There never was a change-over kit that came with that heater.

A propane-fueled LX has a propane gas valve, propane burner orifices, a propane ignition system. They are not designed to work with natural gas and your performance would suffer if you try.

Sta-Rite Max-E-Therm (and the new Pentair Master Temp, same heater different housing) heaters are the only heaters I am aware of that have a simple (and included) change-over system to go from natural gas to propane or back. Except in this case, changing from one fuel to another is not recommended and could be dangerous.