Propane heater. I light the pilot and turn the gas valve to ON position. When I turn up stat to fire the heater the pilot light goes off.
This is a new gas valve and pilot generator. Heater did the same thing with old parts.
millivolt pilot generator setup.... 2 wire thermostat...are you holdning down the gas valve dialin PILOT position then letting it up after 30secs pilot should stay lit then move valve to ON position...have stat in off position before doing anything