Lennox 32M86 (32M8601) - Flame Sensor

Specifications

• Manufacturer: Lennox
• Part Number: 32M86
• Manufacturer Part Number: 32M8601
• Product Type: Flame Sensor
• Style: Single-Prong
• Length: 3.01 in.
• OEM: Genuine Lennox Replacement Part
• Application: Gas Furnaces and Heating Equipment

Common Symptoms of a Faulty Lennox 32M86 Flame Sensor

A dirty or failing flame sensor is one of the most common causes of furnace ignition problems. Symptoms may include:

• Burners ignite but shut off after 2–5 seconds.
• Furnace repeatedly attempts to ignite before locking out.
• Ignition lockout or flame failure error codes.
• Intermittent heating.
• No heat even though the inducer motor and hot surface ignitor are operating correctly.
• Furnace operates normally one cycle and fails on the next.

In Alberta, including Calgary, Edmonton, Red Deer, Lethbridge, Medicine Hat, Grande Prairie, and Fort McMurray, furnaces often run for extended periods throughout the winter. This continuous operation can cause oxidation to build up on the flame sensor, resulting in nuisance flame failure faults.

Throughout the Greater Toronto Area, including Toronto, Mississauga, Brampton, Vaughan, Markham, Richmond Hill, Oakville, Burlington, Milton, Ajax, Pickering, Whitby, Oshawa, and Hamilton, dirty flame sensors are one of the more common causes of intermittent no-heat service calls during the heating season.