If your Lennox, Armstrong, or Ducane furnace is acting up – no heat, weak flame, or the burner won't ignite – the flame sensor is often the culprit.

This 52W2901 replacement sensor is built to fix exactly that.

It's a direct replacement for part numbers 52W2901 and 52W29, and it's made with premium materials that exceed OEM specs, so it lasts longer than the factory original.

The sensor rod detects whether the burner flame is present; if it's dirty or worn, the furnace will shut off for safety.

Replacing it is straightforward – usually just a screw or two, no specialized tools needed.

This upgraded version is more durable than standard sensors and resists oxidation and corrosion.

It restores reliable ignition so your furnace kicks on every time.

Backed by a no-questions-asked return policy.

A small part that saves you a service call and gets your heat back fast.