Dometic CoolMatic MR-07 / MH-07
Official technical documentation and workshop diagnostics for CoolMatic MR-07 / MH-07.
View official manual on manufacturer's site ↗Technical Specifications
Electrical12 V DC operating voltage, Average power consumption: 36 W (MR-07), 15 - 20 W (MH-07), Cut-off voltage: 11.6 V, Cut-in voltage: 12.1 V, Minimum supply line fuse rating: 15 A
Gas Or PressureRefrigerant circuit contains R-134a
Capacities DimensionsCapacity: 7 liters, Dimensions: Weight 10.9 kg (MR-07), Weight 4.5 kg (MH-07), Ambient operating temperature range: -10 °C to +55 °C, Maximum air humidity: 90%
Master Troubleshooting & Diagnostics Matrix
| Error Code / Indicator | Symptom / Meaning | Possible Cause | Step-by-Step DIY Fix | Suggested Actions |
|---|---|---|---|---|
N/A | Compressor does not run (UKL = 0 V) | Interruption in connection between battery and electronics or supply line fuse blown | Establish a secure connection and replace any blown supply line fuses | DIY Safe |
N/A | Compressor does not run (UKL <= UON) | Battery voltage too low, loose cable connection, high resistance corrosion, low battery capacity, or inadequate cable cross-section | Charge battery, fix loose connections, clean corrosion, replace weak battery, or upgrade cable cross-section per manual chart | DIY Safe |
N/A | Poor cooling, interior temperature increases / Compressor runs continuously | Could be an iced-up evaporator, too-high ambient temperature, poor ventilation, a dirty condenser, or a faulty fan | Defrost evaporator, move refrigerator to a well-ventilated location, clean dust/dirt from condenser, or replace defective fan | DIY Safe |
N/A | Unusual noises / Loud humming | Refrigerant circuit component cannot move freely (touching housing wall) or foreign body jammed between cooling unit and wall | Carefully bend the component away from the housing wall or remove the foreign body | DIY Safe |
N/A | Device does not heat (MH-07) | Interruption in power supply line, blown fuse, or low battery voltage | Check wiring, replace fuse, and recharge the battery | DIY Safe |
Frequently Asked Questions
Q: What can replace my old Dometic RM fridge?
Dometic's 2023 'New for old - simply swap' guide covers both its absorption and compressor fridges, showing which current models replace older ones. It's available from the catalogues section of Dometic's website.