M.C. Enterprises 31501MC 12V Atwood Furnace Ignition Board

M.C. Enterprises 31501MC is an aftermarket 12-volt DC direct-spark-ignition (DSI) furnace control-board replacement for selected Atwood/Hydro Flame models. M.C. Enterprises identifies this exact MPN as its counterpart to Dometic/Atwood 31501. It is not a universal replacement for every Atwood furnace control.

Part identification

• Exact MPN: 31501MC (M.C. Enterprises)
• OEM reference: Atwood/Dometic 31501
• Control system: 12V DC furnace ignition and fan-control/relay functions
• Supplier-listed package: Control-board kit with two standoffs and an edge-style connector adapter; confirm your original harness connection
• Condition: New

Supplier-listed furnace model references

• 7900/8000: 7912-II, 7900-II 16, 7900-II 20, 8012-II
• Earlier families: FA 79D, HF 80D, DC82 25-32, DC82 35-41, FA 76D, FA 78 25-32, FA 72D
• 8500-IV: 85-IV 16, 85-IV 20, 85-IV 25, 85-IV 31, 85-IV 35
• 8500-III: 85-III 16-20, 85-III 25, 85-III 31-35
• 8500-II: 85-II 25, 85-II 31-35
• 8500-I: 85-I 16-20, 85-I 25, 85-I 31-35
• 8900 DC: 89-I DC, 89-II DC, 89-III DC

These are supplier-listed model-family references, not a fitment guarantee for every furnace or production revision. Match the full model, board number, voltage and existing harness. Supplier documentation excludes two-stage and AC-powered configurations. M.C. Enterprises separately specifies 33521MC for certain older 1990s furnaces, which are not automatically compatible with 31501MC. Follow the appliance-specific service manual and use qualified furnace service where necessary.