Weak flame or not hot enough

Weak flame, or it will not get hot

• Heat-up: it is designed to preheat in 20 minutes; add 5 to 10 in the cold. Check the stone with an infrared thermometer (Essentials Guide).
• Gas: a full tank, the correct regulator, no leaks in the hose, and sealed joints (Essentials Guide).
• Sudden drop in flame (the manual): turn the knob off, wait 30 seconds and relight. Still low: knob and tank off, disconnect the regulator, reconnect, leak test, open the tank, wait 30 seconds and relight.
• Weather: use propane, not butane, and shelter it from the wind.