Cooling Units
The cooling unit is the sealed core of an absorption fridge — the coils and boiler on the back that turn a heat source into cold air, with no compressor and no moving parts. When one leaks its ammonia charge, the fridge is done cooling and the fix is a replacement unit, not a repair. This category covers full cooling units like the Nordic 6618 for Norcold, plus the thermistors, heating elements, ignitor electrodes, and power boards that fail long before the sealed system does.
29 products
Nordic 6618 Refrigerator Cooling Unit | Direct Fit for Norcold 2118
Norcold 1200 Series Refrigerator Power Board | Replacement Part
Dinosaur Electronics 6212XX Power Supply Board | Norcold Refrigerator Replacement
Dinosaur Electronics Micro P-246 Plus Refrigerator Control Board | 2-Way/3-Way AC/DC/Gas
Norcold 633287 Refrigerator Electrical Board Kit | Power Board & Control Adapters, Fits N641/N841/N1095
Dinosaur Electronics Refrigerator Control Board | Replaces Dometic 385071201
P-711 Exerciser | Dometic Refrigerator Board Test Tool
Norcold Compressor Control Module | Replacement Refrigerator Control Board
Norcold Valve Burner Tube | OEM Replacement Part 621445
Norcold 628661 Refrigerator Power Circuit Board | 2-Way Power Supply, Post-2006 Models
Norcold 637082 Power Board Kit | Refrigerator Control Board
Norcold 639550 Refrigerator Service Kit | User Interface Board
Norcold Refrigerator Gas Control Valve | Replacement Part 623297
MC Enterprises Refrigerator Heating Element | Replacement for Dometic (Atwood) RV Refrigerators
Dinosaur Electronics 2-Way Refrigerator Circuit Board | Norcold Replacement for P/N 61716822
Norcold Refrigerator Power Supply Board | 2-Way, Replaces P/N 618661
Norcold Refrigerator Power Supply Board | 3-Way, Replaces P/N 618666
Norcold Gas Train Assembly Kit | Polar N7/N8/N10 Series RV Refrigerators
Norcold Refrigerator Temperature Monitor Control | Replacement Control, Model 637360
Norcold 634650 AC Power Adapter | For NRF Series Portable Refrigerator/Freezer
Norcold AC Heating Element | 225W/110V, Fits 1200 Series Refrigerators
Dometic RM3862/RM3863 Refrigerator Heating Element | 325W, 120V Replacement
Norcold Refrigerator Heating Element | OEM Replacement Part 638374
Norcold Refrigerator Burner, Orifice & Gasket | Fits N260 Series
MC Enterprises Refrigerator Thermocouple | Dometic RV Refrigerator Replacement
MC Enterprises Replacement Thermocouple | 350mm, for Dometic RV Refrigerators
Norcold Electrode | Replacement Ignitor Electrode for RV Refrigerator Cooling Units
Norcold 636658 Refrigerator Thermistor Assembly | Fits 1200, 1210, N1095 Models
Norcold Refrigerator Drain Hose Assembly | OEM Replacement
Diagnosing before you replace the cooling unit
A cooling unit is the most expensive part of an absorption fridge, so it's worth ruling out the cheaper failures first. Plenty of "dead" fridges are actually a bad thermistor telling the board a lie, or a heating element that quit on the electric side, or a control board that stopped firing. Only a truly leaked or blocked sealed system needs the unit itself.
- Cooling unit. A yellow residue or ammonia smell at the back, or a unit that stays warm on both gas and electric, means the sealed system has failed. A direct-fit replacement like the Nordic 6618 for the Norcold 2118 rebuilds the cold side without a new fridge.
- Thermistor. The Norcold 636658 assembly for 1200, 1210, and N1095 models tells the board the box temperature. A drifting thermistor makes the fridge run too warm or freeze everything — cheap to swap, easy to overlook.
- Heating element. On the electric side, the 120-volt element does the boiling. A Norcold 638374 element that reads open means no cooling on shore power even though propane still works.
- Ignitor electrode. The Norcold electrode sparks the propane burner. A cracked or fouled electrode means no light and no gas cooling.
- Boards and test tools. Norcold power boards (637082) and user-interface boards (639550) run the show, and a Dinosaur P-711 exerciser lets you bench-test a Dometic board before condemning it.
If you land on the board as the culprit, the complete units and thermostats live one category over in RV Refrigerators. And before you blame the cooling unit for weak performance in summer heat, check the airflow behind it — the vents and fans that pull heat out the back matter more than most people think.