Dometic RJ-11 to RJ-45 Adapter | FreshJet 5 Heat Pump | 9610008210

Bridge legacy RJ-11 wiring to the new FreshJet 5 Heat Pump control network with the Dometic Penguin II to FreshJet 5 Heat Pump RJ-11 to RJ-45 AC Adapter Harness Kit (SKU 9610008210). Single-unit adapter that lets you retain existing RJ-11 cabling (used with legacy multi-zone CCC and CCC2 systems) when installing a Dometic FreshJet 5 Heat Pump.

⭐ Typical Installation Requires 2 Kits Per Unit

Important quantity note: you will typically need 2 kits per FreshJet 5 Heat Pump unit — one at the unit itself and one at the thermostat. Plan your order accordingly.

What This Adapter Kit Does

Legacy Dometic multi-zone CCC and CCC2 systems used RJ-11 cabling. Modern Connect Essential and FreshJet 5 Heat Pump systems use RJ-45 cabling. This adapter kit bridges the two — meaning you don't have to rewire the entire coach when upgrading to a FreshJet 5 Heat Pump.

When Adapters Are Required

In general, an adapter is required in these scenarios:

• Connecting an RJ-11 cable to a Connect Essential control board
• Connecting an RJ-11 cable to a CMC wall thermostat
• Replacing a CCC2 10-button wall thermostat with a Connect Essential CMC thermostat

How Many Adapters Do You Need?

The total number varies by installation. Key factors:

• Total number of rooftop units being replaced
• Position of each unit within the daisy-chain wiring sequence

Rule of thumb per unit: 2 kits (one at the unit, one at the thermostat). If you're unsure about your specific installation, chat or call us with your setup details for guidance.

Worked Example — Two Rooftop Units, One Thermostat

A common two-unit scenario: you have two rooftop air conditioners on a single thermostat and you're replacing one of them with a FreshJet 5 Heat Pump, leaving the other in place on its CCC2 board. Paired with a Connect Essential thermostat, that configuration takes 3 adapter kits total:

• One at the thermostat
• One connecting the thermostat wire to the FreshJet 5 Heat Pump
• One connecting the FreshJet 5 Heat Pump to the daisy-chained wire running to the remaining CCC2 unit

No additional wire needs to be run behind the wall. Full breakdown: What replaces one of two Dometic Blizzard NXT heat pumps?

⚠️ Specific to FreshJet 5 Heat Pump

This harness is engineered specifically for FreshJet 5 Heat Pump units. Verify your installation is a FreshJet 5 Heat Pump before ordering — other FreshJet variants may use different adapter configurations.

Companion AC — FreshJet 5 Heat Pump

This adapter is specifically for use with the Dometic FreshJet 5 Heat Pump AC when replacing a legacy unit with existing RJ-11 wiring:

• FreshJet 5 Heat Pump — White (FJX5557EHPWHCS)
• FreshJet 5 Heat Pump — Black (FJX5557EHPBKCS)

Companion thermostat: Dometic Connect Essential CMC Thermostat (9610007991).

Cross-Reference Part Numbers

• SKU: 9610008210

⚠️ Professional Installation Recommended

Installation involves connecting control wiring between the RJ-11 legacy cable and the RJ-45 modern equipment. Installation should be performed by a qualified RV service technician familiar with Dometic control network wiring.

Genuine Dometic OEM

Key Features

• Genuine Dometic OEM RJ-11 to RJ-45 adapter harness kit
• SKU: 9610008210
• For FreshJet 5 Heat Pump installations
• Bridges legacy RJ-11 wiring (CCC/CCC2 systems) to modern RJ-45
• Single adapter — typically 2 kits required per FreshJet 5 Heat Pump unit (one at unit, one at thermostat)
• Two-unit example: 3 kits total for a CCC2 unit paired with a FreshJet 5 Heat Pump on one thermostat
• Required when: connecting RJ-11 cable to Connect Essential board, connecting RJ-11 cable to CMC wall thermostat, or replacing CCC2 10-button thermostat with Connect Essential CMC thermostat

Specifications

• Brand: Dometic
• SKU: 9610008210
• Type: RJ-11 to RJ-45 AC Adapter Harness Kit (Single)
• Application: Legacy RJ-11 to FreshJet 5 Heat Pump wiring conversion
• Compatible System: FreshJet 5 Heat Pump
• Bridges: Legacy RJ-11 wiring (CCC/CCC2) → Modern RJ-45 (Connect Essential/CMC)
• Typical Quantity Required: 2 per FreshJet 5 Heat Pump unit (one at unit + one at thermostat)
• Two-Unit Example: 3 kits total — one CCC2 unit retained + one FreshJet 5 Heat Pump on a single Connect Essential thermostat