Dometic Atwood Hydro Flame AFL Igniter Control Board | 30621 | AC

Restore reliable ignition on your Atwood Hydro Flame AFL furnace with the Dometic Atwood 30621 OEM Hydro Flame Furnace AFL Igniter Control Board — AC. Genuine Dometic Atwood OEM replacement ignition control board for 120V Park Model AFL furnaces. Performs all functions necessary to turn the furnace on and keep it running — with built-in safety features including 15-second ignition delay and flame lock-out.

What This Board Does

The 30621 igniter control board is the central ignition brain of the Atwood Hydro Flame AFL furnace. It:

• Sends signals to open the gas valve at the correct point in the ignition cycle
• Emits high output voltage that creates an ignition spark to light the burner
• Monitors flame presence to ensure proper combustion
• Manages ignition sequence timing
• Enforces safety lock-outs on ignition failures

⭐ Safe Startup — 15-Second Ignition Delay

The board incorporates a 15-second ignition delay designed to purge any unburned gas from the combustion chamber before attempting ignition. This delay ensures a safer and more reliable ignition — eliminating the risks associated with gas buildup that could cause hazardous conditions.

⭐ Ignition Failure Lock-Out

The board features a lock-out safety feature that engages if either:

• Spark generation fails to occur during the ignition cycle
• The gas valve fails to open during the ignition cycle

This proactive safety feature halts further ignition attempts, providing an additional layer of security to prevent hazardous situations such as gas leaks or explosions.

⭐ Continuous Flame Monitoring

During operation, the board continuously monitors the presence and quality of the flame in the combustion chamber. Micro-amp sensing capabilities integrated with the electrode ensure the furnace operates under optimal and safe conditions. As long as the board detects the minimum required micro-amps from the electrode, it maintains uninterrupted heating without entering lock-out mode.

⚠️ For 120V Park Model AFL Furnaces (AC)

Important compatibility note: this is the AC (120V) version designed for Park Model furnaces. If your Atwood Hydro Flame furnace runs on 12V DC, this is NOT the correct control board.

Compatible Atwood Hydro Flame Furnaces

Direct replacement for these Atwood AFL furnace models:

• AFLA35211, AFLA35221, AFLA35231
• AFLA40211, AFLA40221, AFLA40231

Verify your existing furnace model matches one of these before ordering.

DC (12V) Coach Version Instead?

If your Atwood Hydro Flame furnace is a standard 12V DC coach furnace (not a 120V AC Park Model), see the Dometic Atwood 31501 Igniter Control Board — DC — engineered for the broader Atwood Hydro Flame lineup including 7912/7916/7920, FA-series, 8500/8900 series, AFSD, AFMD, DFMD, DFSD series.

2-Stage Atwood Furnace Instead?

For Atwood 2-stage furnaces (models 1522, 2334, 2540), see the Dometic 34109 Ignition Control Circuit Board — engineered specifically for 2-stage furnace applications.

Dimensions

• Length: 5-1/8"
• Width: 3-1/2"

Cross-Reference Part Numbers

• Part Number: 30621

⚠️ Professional Installation Required

Installation involves 120V AC electrical wiring, gas system integration, and ignition system connections. Because of the safety-critical nature of furnace ignition control components, installation should be performed by a qualified RV service technician. Improper installation can result in gas leaks, ignition failures, or fire/explosion hazards.

1-Year Manufacturer Limited Warranty

Genuine Dometic Atwood OEM

Key Features

• Genuine Dometic Atwood OEM Hydro Flame AFL igniter control board
• Part number: 30621
• For 120V AC Park Model AFL furnaces
• 15-second ignition delay — purges unburned gas from combustion chamber
• Ignition failure lock-out — halts attempts if spark or gas valve fails
• Continuous flame monitoring via micro-amp sensing
• Compatible models: AFLA35211, AFLA35221, AFLA35231, AFLA40211, AFLA40221, AFLA40231
• Dimensions: 5-1/8" × 3-1/2"
• Backed by 1-year manufacturer limited warranty

Specifications

• Brand: Dometic (Atwood)
• Series: Hydro Flame AFL
• Part Number: 30621
• Type: Furnace Igniter Control Board
• Voltage: 120V AC (Park Model)
• Compatible Furnace Models: AFLA35211, AFLA35221, AFLA35231, AFLA40211, AFLA40221, AFLA40231
• Ignition Delay: 15 seconds (gas purge)
• Safety Features: Ignition failure lock-out, continuous flame monitoring, micro-amp sensing
• Dimensions: 5-1/8" × 3-1/2"
• Warranty: 1-year manufacturer limited warranty