What do the OFF, PILOT, and ON positions on my gas fireplace control knob mean?
OFF shuts all gas to both the burner and the pilot. PILOT sends gas only to the small standing pilot flame and is where you press and hold to light it. ON, once the pilot is lit, opens the main valve so the burner fires and the fireplace runs. It's a three-stage safety gas valve you move through in order.
Reading the knob, left to right
OFF means exactly that — no gas reaches the pilot or the burner, and everything is cold. PILOT sends a trickle of gas to the small standing pilot flame only; this is the position where you press and hold to light it, and where the fireplace sits ready but idle. ON, once the pilot is established, opens the main valve and lets gas flow to the full burner so you get real fire and heat. Think of it as three stages: everything off, pilot only, full burn. Some knobs use symbols instead of words, but the order is always the same.
Why it moves in that order
The sequence is a safety interlock, not a design quirk. On most valves you have to press the knob in to move it, and it won't jump straight from OFF to ON — you have to stop at PILOT, light the pilot, and let the thermocouple prove that flame before the knob will advance. That's deliberate. The valve refuses to dump gas to a big burner unless it already knows a pilot is lit to ignite it. Older millivolt units and newer electronic ones both respect this logic, just with different hardware doing the proving.
Shutting down and the summer question
To shut the fireplace off for the evening, most people just turn the burner off at the switch or remote and leave the knob on PILOT. To shut it down completely — for summer, travel, or service — rotate the knob to OFF and the standing pilot goes out too. Whether to leave the pilot lit all summer is a genuine debate: it keeps moisture and spiders out of the works, but burns a little gas doing it. Either choice is fine. If yours won't relight come fall, that's a quick service call — (828) 545-0525.
Related questions
- How do I light the pilot light on my gas fireplace?
- How do I turn the pilot light off completely?
- How long do I hold the pilot knob down when lighting it, and why won't it stay lit if I let go too soon?
- How do I turn on my gas fireplace?
- Should I leave my gas fireplace pilot light on all summer or turn it off?
- Do I have to take the glass off my gas fireplace to get to the pilot light?
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