ODS Pilot Assembly Guide: What It Is and When to Replace It

By Fireplace Choice March 19, 2026 | Empire gas fireplace ODS oxygen depletion sensor pilot assembly replacement safety Superior vent-free | 0 comments

If you own a vent-free (ventless) gas fireplace, gas log set, or wall heater, your unit almost certainly uses an ODS pilot assembly. ODS stands for Oxygen Depletion Sensor — a critical safety device that shuts off the gas if oxygen levels in the room drop below a safe threshold....