Lennox Flame Rollout Switch 52M73

Lennox roll out switch P/N 52M73

Replaces P/N 52M7301, 70L56, 70L5601, R20017402

If a rollout switch is tripping it typically indicates a very dangerous condition exists and the furnace needs to be inspected by a professional HVAC technician. This switch is designed to trip when it detects flue gas being directed inside the building instead of being exhausted out the flue. It detects problems such as a blocked flue, negative pressure inside the building or a damaged heat exchanger.

Genuine Lennox parts

Shipping rate for continental United States

$49.00

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  • Model: 52M73
  • Manufactured by: Lennox
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July 31, 2025 by Joseph W. (United States)
“Simple and easy”
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July 30, 2025 by Bill D. (United States)
“Great customer service and excellent prices. Very easy to order online.”
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July 29, 2025 by Bill J. (United States)
“Great service and good price. I’ve used you before and I’m a long-term customer. Many Thanks!!”

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