The question of where exactly the refrigerator is turned on in the cab of a DAF truck often confuses not only beginners, but also experienced drivers who have switched to a new model or are faced with non-standard equipment. The climate control and autonomous cooling system in modern tractors, such as DAF XF Euro 6 or DAF CF, is more complex than in passenger cars, and is often tied to the general electrical network of the vehicle. Finding a control element can take a lot of time if you don’t know the specific location of the control units for a specific model range.
It is important to understand that by “refrigerator” in the context of a truck, drivers can mean two different devices: a built-in thermoelectric box in a niche or folding panel, or an autonomous refrigeration unit (refrigerator) mounted on a frame behind the cab. The logic for turning on these systems is radically different. In the first case, the control is located inside the cabin, in the second, it is often taken outside or duplicated in the cabin with a separate remote control. Next, we will analyze both options in detail so that you can quickly find the necessary button or switch.
Key Factor here is the year of manufacture of the tractor and its specific modification, since DAF engineers regularly change the architecture of the on-board network. For example, in older models of the XF95 or XF105 series, the buttons could be located on the center console, while in the new XF 106 and 105 they are often integrated into the panel DAF Multidriver or placed in the berth area. Incorrect connections or looking in the wrong places can drain your batteries, so it's important to clearly identify the type of equipment you have.
⚠️ Warning: Before searching for electrical components, make sure the battery ground is disconnected if you plan to reach into the fuse box. A short circuit in the refrigeration unit circuit can damage the engine control unit (ECU), which will lead to expensive repairs.
Location of the built-in refrigerator power button
If we are talking about a standard refrigerator built into the cabin structure (usually these are models with a spacious berth), then its control is most often located in close proximity to the cooling box itself. In most modern DAF models, including XF Super Space Cab, the control panel is built into the upper part of the refrigerator niche or on the end wall next to the door. Look for a small plastic panel with an indicator 12V/24V and a power button. Sometimes it is hidden under a decorative trim that needs to be carefully pryed off.
In some configurations, especially in series models DAF CF, component manufacturers (for example, Dometic or Indel B) place the controls on the center console or dashboard. In this case, you need to inspect the area around the radio or interior climate control unit. Look for a button with a snowflake icon or inscription Fridge. If there are loose plugs on the panel, it is possible that the refrigerator function is simply not activated programmatically or is not physically installed, despite the presence of a niche.
Systems with digital control, where the button can be touch-sensitive, deserve special attention. Tactile feedback such buttons are weak, and in conditions of vibration of the truck on the move, they are difficult to feel. Make sure the vehicle's ignition is on, as many DAF on-board refrigerators do not run on battery power when the engine is off to save battery. This is an important feature that drivers who are trying to cool groceries in a parking lot forget about.
- ❄️ Check the top and side walls of the refrigerator niche for a hidden control panel.
- 🔌 Inspect the center console and multimedia area for a button with snowflake icon.
- 🚛 Make sure the ignition key is turned to the "On" position to activate the power circuit.
Control of an autonomous refrigeration unit (Refrigerator)
The situation changes dramatically if your DAF is equipped with a full-fledged refrigeration unit for transporting perishable goods. In such cases (for example, installations Thermo King, Carrier or Frigoblock), the control is rarely duplicated inside the cabin in a standard form. The main control panel is always located outside, on the front wall of the refrigerated body, so that the driver can control the loading parameters without entering the isothermal van.
However, for the convenience of the truck driver, a remote indicator or a simplified remote control is often installed in the DAF cab. It can be located on the rear wall of the cabin (on the sleeping bag side) or in a niche above the windshield. If you don't see an obvious remote, check for a wireless remote that might have gotten lost in the glove compartment. Modern systems allow you to control the temperature via Bluetooth application on a smartphone, connecting directly to the installation controller.
In new DAF models with integrated telematics systems, control can be displayed on the on-board computer display. To access these functions, you need to go to the section Vehicle Info or Trailer Managementthrough the navigation menu. The current temperature and operating status of the compressor can be displayed there. If the power button is not found anywhere, the unit may operate in automatic mode when the engine is running and does not require manual start from the cab.
⚠️ Warning: Never attempt to turn on the refrigeration unit if the cargo compartment doors are tightly closed and you are inside. A running compressor can quickly displace oxygen or create a dangerous concentration of refrigerant in the event of a leak.
Electrical diagram and search for fuses
If the button is not in place and the refrigerator has stopped working, the problem often lies in a blown fuse. On DAF trucks, the mounting blocks are located in several places: usually one is located in the cab (to the left of the driver or under the passenger seat), and another in the engine compartment or on the frame. You will need a fuse diagram, which is often pasted on the inside of the unit cover or printed in the service book.
Look for a fuse marked AUX, CAB HEATER or FRIDGE. The current rating is usually from 10 to 20 Amps, depending on the power of the compressor. Visual inspection a fuse link may not work if the thread is intact, but the contact is oxidized. It is best to use a multimeter or replace the fuse with a known good one of the same rating. Using a fuse of a higher rating is strictly prohibited - this can lead to melting of the wiring.
It is also worth checking the relay responsible for turning on the circuit. It may be located in the same mounting block. When power is applied to the power button, the relay should make a characteristic click. If there is no click and the fuse is intact, the problem may be in the switch itself or a broken wire in the corrugation between the cab and the frame (if the control is external). A common DAF disease is a break in the wires in the harness under the cab due to constant vibration.
Inside the chamber| Component | Location | Rating (example) | Symptom malfunction |
|---|---|---|---|
| Fuse F12 | Block in the cabin (left) | 15 A | The refrigerator does not turn on at all |
| Relay R4 | Underhood unit | 12V / 30A | No click when pressing the button |
| Temperature sensor | - | Incorrect display of degrees | |
| Main switch | Panel devices | - | No indication on the display |
What to do if the fuse burns out immediately after replacement?
If the new fuse burns out instantly, this indicates a short circuit in the circuit. Do not attempt to install a larger fuse or bug. It is necessary to ring the wiring from the fuse box to the refrigerator, checking the insulation for rubbing against the metal parts of the frame.
Diagnostics of cooling system faults
When the button is found and power is supplied, but the cold does not flow, the diagnostic stage begins. First of all, check the operation of the fan. If it does not spin, the compressor may overheat and go into protection. In DAF trucks, the cabin and refrigerator ventilation systems can be linked, and clogged cabin filters sometimes affect the efficiency of heat exchange, although this is an indirect connection.
Pay attention to the error indicators. Digital control panels often flash a certain number of times to indicate a fault code. For example, three long and two short blinks may indicate a temperature sensor error, and continuous blinking may indicate low voltage in the on-board network. Low voltage - a common problem when operating on additional batteries that are not fully charged from the generator during short runs.
If the refrigerator is working but not freezing, check integrity of door seals. In conditions of long-distance transportation, where temperature differences are large, rubber quickly hardens and cracks. Warm air constantly gets inside, and the compressor works non-stop, not reaching the set parameters. In this case, the power button has nothing to do with it, the seal needs to be replaced.
- 🔊 Listen to the operation of the compressor: a steady hum is normal, knocking or squeaking is a sign of breakdown.
- ❄️ Check the evaporator for the presence of an ice coat: it blocks air circulation.
- 🔋 Measure the voltage at the terminals of the refrigerator: it should not be lower than 11.5 V with the engine running.
Features of operation in winter
Operation of refrigeration equipment in DAF trucks in winter has its own specifics. Many drivers forget that at subzero ambient temperatures, turning on the cooling mode can be not only useless, but also harmful to the compressor. The oil in the system thickens, and starting can lead to jamming of the piston group. Some models have a built-in thermostat that blocks activation at temperatures below +5°C.
If you need to use the refrigerator as a thermos (to preserve already chilled food), make sure that the heating function (if it has one) is not activated accidentally. In winter, the load on the battery also increases. Alternative power sources, such as hydraulic generators or separate diesel generators (APU), are preferable for long-term parking with a running refrigerator, so as not to drain the main batteries necessary to start the DAF engine.
It is also important to monitor condensation. In winter, the temperature difference between inside and outside the cabin or body leads to the formation of a large amount of moisture. If the drain hole is clogged, water may freeze and damage internal components or create an electrical short circuit. Regular drainage checks are a mandatory procedure before each flight during the cold season.
⚠️ Attention: Do not leave the refrigerator turned on for a long period of time unattended if you are not sure that the battery protection system is working properly. This may result in you not being able to start your DAF truck after rest.
☑️ Pre-trip check
Recommendations for maintenance and care
To extend the life of the refrigerator in your DAF, it is necessary to carry out regular preventive maintenance. Cleaning the condenser from dust and lint is the first necessity. A clogged heat exchanger forces the compressor to work at its limit, which shortens its life. Use a soft brush or compressed air to clean the grilles, usually located at the rear or bottom of the unit.
It is also worth periodically checking the tightness of the fasteners. Truck vibration is the main enemy of any vehicle. Loose compressor or fan mounting bolts can lead to their destruction or damage to the refrigerant tubes. Loss of freon due to microcracks in places of vibration - one of the most common causes of system failure, which is difficult to diagnose without special equipment.
Do not forget about hygiene. Mold and bacteria that grow inside the chamber not only spoil food, but can also clog the air circulation system. Regularly wash the inner walls with a soda solution or special products for car refrigerators. Avoid using abrasive materials that can damage the interior coating of the chamber.
Frequently asked questions (FAQ)
Why does the refrigerator in the DAF turn on only when the engine is running?
This is a standard setting of the energy saving system. The on-board network of a truck is not designed for long-term operation of an energy-intensive compressor from starter batteries without recharging by a generator. To avoid battery discharge, the controller blocks switching on when the voltage is low or the ignition is turned off. Some models allow you to change this in the settings if an additional battery is installed.
Is it possible to install a refrigerator in a DAF if it did not come with one from the factory?
Yes, it is possible. There are many universal models of car refrigerators (12/24V) that can be mounted in a niche or on the floor of the cabin. To connect them, you will need to draw a separate line from the fuse mounting block by installing the appropriate circuit breaker. It is important to correctly calculate the cross-section of the wire to avoid overheating of the wiring.
What does the flashing indicator on the panel of the DAF refrigerator mean?
Flashing usually indicates a malfunction. The number of flashes or their color corresponds to a specific error code, which can be found in the instructions for a specific model of refrigeration unit (for example, Dometic or Webasto). Most often, this is a signal about compressor overheating, low voltage or a malfunction of the temperature sensor.
Where can I find a fuse diagram for a refrigerator in a DAF XF 105?
The diagram is located on the inside of the plastic cover of the fuse mounting block, which is located in the driver's cab (usually to the left of the steering wheel or under the dashboard). Also, a copy of the diagram is often available in the car’s service book. If the sticker is unreadable, contact an authorized dealer or find an electrical diagram for your VIN code on the Internet.