UIB64 Universal Ignitor Board | Atwood AC/Gas RV Water Heater 4 & 6 Position Edge Style

UIB64 Universal Ignitor Board – Atwood AC/Gas RV Water Heater 4 & 6 Position Edge Style

The UIB64 universal ignitor board is a versatile replacement ignition control module designed for Atwood AC/gas RV water heaters. Its unique design supports both 4-position and 6-position edge-style connectors, making it compatible with a wide range of Atwood water heater models. The board manages 12V spark ignition, flame sensing, gas valve operation, and safety lockout, ensuring reliable hot water for your RV.

This UIB64 universal ignitor board replaces multiple Atwood part numbers and features a compact design, reliable performance, and straightforward installation. Its universal connector design eliminates the need to identify the exact original board number — it works with both 4 and 6 pin configurations.

Compatibility

• Atwood 6-gallon water heaters: GC6AA-10E, GC6AA-9E, G6A-8E, G6A-7E
• Atwood 10-gallon water heaters: GE16-EXT, GE9-EXT, G16-EXT, GC10A-4E
• Atwood AC/gas combination water heaters (both electric and gas modes)
• Atwood water heaters with 4-position edge-style connector
• Atwood water heaters with 6-position edge-style connector
• Dometic WH-6GA, WH-9GA, WH-10GA water heaters (rebranded Atwood)
• Replaces board numbers: UIB64, 520814, 520820, 91367, 31501, 33488, 33727, 521099
• Most Atwood/Dometic 6-10 gallon AC/gas water heaters with electronic ignition

Key Features

• Dual Connector Support: Works with both 4-position and 6-position edge-style connectors — no need to identify exact original board
• 12V Spark Ignition: Reliable 15kV spark output for consistent ignition
• Flame Sensing: Flame rectification technology for accurate flame detection
• 3-Trial Ignition: Up to 3 ignition attempts before safety lockout
• 30-Minute Lockout: Safety lockout after 3 failed attempts (manual reset)
• Gas Valve Control: 12V DC output for gas solenoid valve (up to 2A)
• Plug-and-Play: No programming or wiring modifications required
• Compact Design: Fits in the same mounting space as the original board
• Protection Circuitry: Reverse polarity, over-voltage, under-voltage protection

Specifications

Installation Guide

1. Safety first: Turn off propane supply at the tank. Disconnect 12V power at the battery or water heater switch. Also turn off 120V AC power if the water heater has an electric mode. Allow the water heater to cool completely.
2. Access the board: Remove the water heater exterior access panel. The ignitor board is typically mounted near the burner assembly, visible through the access panel. It may be behind a small plastic cover or mounted directly to the burner housing.
3. Identify the connector: Check whether your original board uses a 4-position or 6-position edge-style connector. The UIB64 supports both — simply use the appropriate connector position on the new board.
4. Document connections: Take photos of all wiring connections before disconnecting. Note the position of each wire in the connector. If the wires are individual spade terminals rather than a connector, label each wire.
5. Disconnect wires: Unplug the edge connector from the old board, or remove individual spade terminals. Note the orientation of the connector (which side is pin 1).
6. Remove old board: Unscrew the 2 mounting screws holding the board to the water heater housing or mounting bracket.
7. Install new board: Mount the new UIB64 board in the same position. Ensure the appropriate connector (4 or 6 position) is aligned with your wiring. Secure with the 2 mounting screws.
8. Reconnect wires: Plug the edge connector into the corresponding position on the new board (4 or 6 pin). If using individual spade terminals, connect each wire to the correct terminal (refer to your photos). Ensure all connections are secure and properly seated. Double-check the 12V power connections — incorrect wiring can damage the new board.
9. Test operation: Reconnect 12V power (and 120V if applicable). Turn on propane. Turn on the water heater switch inside the RV (select GAS mode if combination unit). Verify the ignition sequence: spark ignites → gas valve opens → burner lights → flame is sensed → continues heating. Check for proper flame (blue with yellow tips). Let the unit run until it reaches temperature and cycles off. If the unit locks out, check all wiring connections, the gas supply, and the electrode gap. Test the electric mode separately if applicable.

Common Symptoms of a Bad Ignitor Board

• Water heater won’t ignite on gas mode — no spark or gas
• Spark occurs but gas valve doesn’t open (no flame)
• Flame ignites but won’t stay lit (flame sensing failure)
• Water heater locks out after one ignition attempt (should retry 3 times)
• No spark at the electrode (spark output failure)
• Intermittent gas ignition — works sometimes, not others
• Clicking sound from the board but no ignition
• Burning smell or visible burn marks on the board
• 12V fuse for the water heater blows repeatedly
• Electric mode works but gas mode doesn’t (combination units)
• No hot water on gas mode — burner never ignites

Frequently Asked Questions

Q: What does “UIB64” mean?

A: UIB64 stands for “Universal Ignitor Board, 64” — the “64” indicates that it supports both 6-position and 4-position edge-style connectors. This universal design means it can replace ignitor boards with either connector type, eliminating the need to identify the exact original board number. The board has both connector positions on it, and you simply use the one that matches your wiring. If your original board has a 4-pin connector, use the 4-position side. If it has a 6-pin connector, use the 6-position side. The board’s circuitry automatically adapts to the connector configuration.

Q: How do I know if my board is 4-pin or 6-pin?

A: To determine your connector type: (1) Remove the water heater access panel and locate the ignitor board. (2) Look at the wire connector plugged into the board — count the number of pins or wires in the connector. (3) A 4-pin connector will have 4 wires (typically: 12V positive, 12V negative/ground, gas valve, spark/flame). (4) A 6-pin connector will have 6 wires (adding thermostat and/or electric mode signals). (5) If the wires are individual spade terminals rather than a connector, count the number of terminals on the board. The UIB64 works with both — just use the appropriate connector position. If you’re unsure, the UIB64 is a safe choice because it supports both configurations.

Q: Can I use this board in a furnace instead of a water heater?

A: The UIB64 is specifically designed for Atwood AC/gas water heaters. While it shares similar ignition technology with furnace boards, there are important differences: (1) Furnace boards typically include fan control (pre-purge and post-purge), which water heater boards don’t have. (2) Furnace boards may have different timing sequences (longer trial ignition, different lockout times). (3) The connector configurations may differ. Using a water heater board in a furnace may result in improper fan operation, incorrect timing, or connector mismatch. We recommend using the correct board for your specific appliance. For Atwood furnaces, use the 520820, 520814, or 31501 furnace boards. For Atwood water heaters, use the UIB64, 91367, or equivalent water heater boards.

Q: Why does my water heater spark but won’t light?

A: If the spark igniter is working (you can see or hear the spark) but the burner won’t light, the issue is likely with the gas supply or gas valve, not the ignitor board. Common causes: (1) No gas supply: The propane tank may be off, empty, or the valve may be closed. Check the tank valve and verify gas is reaching other appliances. (2) Bad gas valve: The gas valve solenoid may be stuck closed or burned out. Listen for a click when the board calls for heat — if no click, the valve may be bad. Test the coil resistance (should be 10-30 ohms). (3) Clogged burner or orifice: The gas orifice or burner may be clogged with spider webs, dust, or debris. Spiders are attracted to the smell of propane and often build nests in the burner tube. Clean the burner and orifice with compressed air or a small wire. (4) Low gas pressure: A faulty regulator or restricted gas line can cause low pressure that prevents ignition. Test the gas pressure at the water heater inlet (should be 11″ WC). (5) Air in the gas line: If the propane tank was recently disconnected or refilled, there may be air in the line. Purge the air by turning on the gas and letting it flow for a few seconds (with proper ventilation) before attempting ignition. (6) Improper electrode position: The spark electrode may be too far from the burner or misaligned. The spark should jump from the electrode tip to the burner tube. Adjust the electrode position so the spark is at the gas outlet. If the spark is strong and gas is flowing but still won’t light, check the air-gas mixture — a clogged air shutter can prevent proper mixing.

Related Products

• 91367 RV Water Heater Control Board — Atwood water heater ignition control board
• RV Gas Water Heater Solenoid Valve — 12V gas control valve for water heaters
• UIB-S Small Universal Ignitor Board — Compact universal ignitor for furnaces and water heaters

Need help finding the right ignitor board for your Atwood water heater? Contact our technical team with your water heater model number and connector type. Free shipping and duties included on all orders.