Dometic COOLMATIC - User Manual

Questions and Answers

R
Ricky WhiteAug 20, 2025
What to do if my Dometic COOLMATIC has poor cooling and the interior temperature is increasing?
- M
  Monica BakerAug 20, 2025
  If your Dometic Refrigerator isn't cooling well and the inside is getting warmer, it could be due to several reasons. The compressor might be running for too long or constantly. Make sure there's enough ventilation around the refrigerator by moving it to another location if needed. The condenser might be dirty, so try cleaning it. Also, check the fan; if it's faulty, consider replacing it.
W
Wayne LeeAug 22, 2025
What to do if my Dometic COOLMATIC voltage is present but the compressor doesn't run?
- B
  Benjamin JohnsonAug 22, 2025
  If voltage is present but the compressor in your Dometic Refrigerator isn't running, it could be due to high ambient temperature. Insufficient ventilation could also be the cause, so move the refrigerator to another location. Another possibility is a dirty condenser; clean the condenser.
L
Laura AndersonAug 25, 2025
Why the motor doesn't start in my Dometic Refrigerator?
- D
  Dale JamesAug 25, 2025
  The motor in your Dometic Refrigerator might not start because the rotor is jammed, or the pressure difference in the cooling system is too high (greater than 5 bar).
S
sharon74Aug 26, 2025
What to do if my Dometic COOLMATIC Refrigerator has no voltage?
- J
  Jose SinghAug 26, 2025
  If your Dometic Refrigerator has no voltage, check for interruptions in the connection supply line and establish a connection. If installed, the main switch might be faulty, so replace it if necessary. Also, if there's an additional supply line fuse installed, see if it has blown and replace it if needed.
J
John AcevedoAug 27, 2025
What to do if my Dometic COOLMATIC Refrigerator makes a loud humming noise?
- B
  bailey73Aug 27, 2025
  If your Dometic Refrigerator is making a loud humming noise, it could be because a component of the refrigerant circuit is touching the wall; carefully bend the component away from the obstruction. Alternatively, there might be a foreign object stuck between the cooling unit and the wall; remove the foreign object.
T
Tracy BakerAug 29, 2025
What to do if the Dometic COOLMATIC Refrigerator start attempt with U ?U Term OFF?
- S
  simmonsrobertAug 29, 2025
  If your Dometic Refrigerator shows a start attempt with U ?U Term OFF, it could be due to loose cables or poor contact (corrosion); establish a connection. The battery capacity might be too low, consider replacing the battery. Alternatively, the cable cross section might be too small; replace the cable.
J
Jerry Stanton PhDAug 31, 2025
What to do if the Dometic COOLMATIC Refrigerator start attempt with U ?U Term ON?
- S
  Stephanie KempAug 31, 2025
  If your Dometic Refrigerator shows a start attempt with U ?U Term ON, it could be due to high ambient temperature. Insufficient ventilation could also be the cause; move the refrigerator to another location. Another possibility is a dirty condenser; clean the condenser.
A
Amy MclaughlinSep 2, 2025
What does U = 0 V Term mean for my Dometic Refrigerator and how to fix it?
- L
  lisavargasSep 2, 2025
  If your Dometic Refrigerator displays 'U = 0 V Term', it means there is an interruption in the battery – electronics connection; establish a connection. If installed, the main switch might be faulty; replace the main switch. Also, if an additional supply line fuse is installed, it may have blown; replace the supply line fuse.
S
Savannah WebbSep 4, 2025
What does U ? U Term ON mean for my Dometic COOLMATIC Refrigerator and how to fix it?
- M
  Maurice JohnsonSep 4, 2025
  If your Dometic Refrigerator displays 'U ? U Term ON', it indicates that the battery voltage is too low. Charge the battery to resolve this issue.
S
Samuel SmithSep 6, 2025
What to do if the electric circuit between the pins in the Dometic Refrigerator compressor is interrupted?
- H
  Heather GallegosSep 6, 2025
  If the electric circuit between the pins in the compressor of your Dometic Refrigerator is interrupted, it indicates a defective compressor. Replace the compressor.

Summary

Safety Instructions

General Safety

Safety precautions for general use and on boats.

Operating the Device Safely

Technical Description

Installing and Connecting the Refrigerator

Safety Instructions for Installation on Boats

Connecting the Refrigerator to DC Voltage

Steps and precautions for connecting to 12V or 24V DC power.

Connecting the Refrigerator to AC Voltage

Instructions for connecting to AC mains power, including safety warnings.

Using the Refrigerator

Cleaning and Maintenance

Troubleshooting

CRX 50, CRX65, CRX80 Faults

Fault codes and possible causes for specific CRX models.

CRX110, CRX140 Faults

Fault codes and possible causes for CRX110 and CRX140 models.

Compressor Does Not Run (Battery Connection)

Diagnosing and resolving issues when the compressor won't run on battery power.

Compressor Not Running (AC Supply)

Troubleshooting steps when the compressor is not running connected to AC.

Poor Cooling; High Interior Temperature

Diagnosing and fixing issues related to insufficient cooling performance.

Technical Data

Dometic COOLMATIC Specifications

General

Model	COOLMATIC
Brand	Dometic
Category	Refrigerator
Type	Portable
Power Source	12V DC, 24V DC
Cooling Capacity	Various - depends on specific model
Capacity	Various - depends on specific model
Refrigerant	R134a
Dimensions (H x W x D)	Varies by model
Weight	Varies by model