Firebox Liner | Part #40366

Firebox Liner (40366) – Compatible with Ashley & Jensen Wood Furnaces

Maintain the structural integrity and heat performance of your furnace with this high-quality replacement firebox liner (40366). Engineered for both front and rear placement, this OEM-equivalent liner withstands extreme furnace temperatures while helping to extend the life of your unit. Sold individually—most furnaces require two liners per installation.

Key Features:

• Dual-Use Design – Functions as both front and rear liner for compatible furnaces
• High-Temperature Durability – Withstands extreme heat for long-term performance
• OEM Replacement – Matches US Stove part #40366 and replaces 410-3003
• Precision Fit – Pre-drilled mounting holes 12" on center for straightforward installation

Specifications:

• Part Numbers: 40366 (also replaces 410-3003)
• Dimensions: 15-1/4" wide (tapers to 6-1/8") x 5-1/2" tall
• Mounting Hole Spacing: 12" on center
• Material: High-temperature refractory
• Sold: Individually (2 required per furnace)

Compatible Models:

Ashley Furnaces: 24A, 30A

Jensen Furnaces: 24AF, 24AG, 24AZ, 24AJ, 24AC, 30AC

Note: Always verify compatibility with your owner’s manual before ordering.

Pairs well with: Ashley Stove Parts and US Stove Company Parts

Why Choose the 40366 Firebox Liner?

Replacing worn or cracked liners is essential for maintaining safe, efficient furnace operation. The 40366 liner is engineered to OEM standards, offering heat resistance, structural stability, and a long service life. Protect your furnace and enjoy reliable heating season after season.