The safety valve is shipped with a natural gas pressure regulator installed. When a propane conversion is performed, the vavle needs a propane pressure regulator installed. The kit is located underneath the nickel size cap with the screwdriver slot.
The thermostat works correctly with either gas.
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The cap is on the DVOR-1667. The DVOR-1612 is a FMDA type of safety valve, and the pilot flame contact with the sensing bulb is critical to its proper operation. If the bulb does'nt get hot enough, the pilot will stay lit, but the valve won't open. Adjust the bulb in the pilot assembly for maximum flame contact. If the bulb glows with a dull orange color, but still won't ooperate the valve, you'll need to replace the valve, even though its new. It should be warrantied for 90 days.