FONGLP Heat & Cool Relay Control Board for Dometic RV AC 3106996022 — Direct-Fit Replacement, Analog On/Off Control

FONGLP 3106996022 is a direct-fit heat & cool analog relay control circuit board designed to replace OE part numbers 3106996.022 and 3311924 in Dometic RV air conditioners.

If your Dometic rooftop air conditioner is misbehaving—stuck compressor, fan control problems, or inconsistent heating and cooling—this relay board is a common service replacement that restores analog thermostat control. Built for the 579, 590, 595 and 600 series and compatible with a long list of model kits, the FONGLP relay board fits both cool-and-furnace and heat-strip configurations and is intended for ceiling or under-counter installation inside the AC housing.

Which Dometic models and part numbers will this relay board replace?

This FONGLP relay board is engineered to match the electrical and mounting requirements of many Dometic units. It replaces OE numbers 3106996.022 and 3311924 and fits multiple model kits and series used in RV rooftop systems.

• Compatible with Dometic models: 579 series, 590 series, 595 series, 600 series.
• Direct replacement for part numbers: 3106996.022, 3311924.000, 3106996022.
• Fits relay kit assemblies: 3106997.004, 3106997.012, 3106997.020, 3313189.000, 3313191.000.
• Works with Duo Therm analog thermostat kits such as 317541.009 and 3107541.017.

How does this relay board affect cooling and heating performance?

The board provides analog on/off control for compressor and fan circuits, enabling the thermostat to manage cooling, furnace and heat-strip cycles. Proper relay operation helps ensure the compressor and fans engage and disengage as expected, improving system responsiveness.

• Supports 115 VAC, 60 Hz electrical systems using copper conductors.
• Compatible with units rated around 10,500 BTU cooling capacity (model-dependent).
• Controls slinger fan systems and typical ceiling-mounted compressor assemblies.
• Helps resolve symptoms like a compressor that won’t turn off or intermittent fan operation.

What should I know about installation and durability?

The board ships pre-assembled with CT control components to simplify replacement and match original wiring in most applications. It's built with moisture-resistant materials for stable operation inside the air conditioner’s enclosure.

• Pre-installed CT control board for easier swap-in replacement.
• Designed for ceiling, roof or under-cabinet/under-bunk mounting inside the AC unit.
• Constructed from premium-grade components to resist moisture and vibration.
• Recommended to troubleshoot existing wiring and confirm model compatibility before replacement.

When is replacing the relay board recommended instead of other fixes?

Replace the relay board when diagnostics point to relay or control-circuit failure rather than mechanical compressor issues. Symptoms like relays sticking, continuous compressor run until power disconnect, or loss of thermostat control often indicate the board is the likely culprit.

• Replace after confirming power, thermostat, and compressor condition via troubleshooting.
• Ideal when original relay contacts are burned or the board shows visible damage.
• Recommended if swapping between analog thermostat kits or restoring original functionality.
• Not a substitute for compressor motor or sealed-system repairs.

Who is this for: RV owners, mobile-home technicians, and HVAC service professionals who need a reliable replacement analog control relay for Dometic rooftop air conditioners. If you maintain 579–600 series units, use Duo Therm analog kits, or are restoring AC functionality after control failures, the FONGLP 3106996022 relay board offers a direct-fit, moisture-resistant replacement that works with original and updated wiring harnesses. Always verify model and part number compatibility and perform basic troubleshooting before purchasing to ensure this board addresses the observed fault.