Armstrong 75M21 Furnace Combustion Control Igniter

Armstrong 75M21 Furnace Combustion Control Igniter provides reliable furnace ignition with robust mini-nitride construction for steady performance across diverse heating systems. This replacement igniter is designed for use on standard furnaces and is built to withstand daily operation in residential and light commercial environments. Its durable build reduces the need for frequent replacements, helping technicians save time during service calls and homeowners minimize downtime.

Rated for 95 Volt AC with a current range of 0.3 to 0.8 Amp and a resistance of 450 Ohm, this igniter fits Armstrong specifications and offers dependable start-ups. The compact design measures 0.16 inch in diameter and 12 inches in length, enabling easy installation in tight furnace compartments. It integrates seamlessly with existing combustion control circuits to ensure consistent ignition performance.

As a genuine Armstrong replacement, the 75M21 is engineered for compatibility with a range of furnace models, helping technicians streamline inventory. Its mini-nitride composition offers rapid response and extended service life in high-temperature ignition environments.

• Type: Igniter
• Material: Mini-Nitride
• Voltage: 95 VAC
• Current: 0.3–0.8 A
• Resistance: 450 Ohm
• Dimensions: 0.16" Diameter x 12" Length
• Used On: Furnace