Reefer Trailer Repair in Salem, OR

Salem Mobile Truck Repair repairs refrigerated trailers at your location in Salem, OR and the surrounding area. The technician comes to the yard, the loading dock, the truck stop, or the shoulder of I-5. There is no need to drop the trailer or tow it to a shop. Call (971) 715-2497.

Reefer Unit Diagnostics

Most reefer trailer calls start with an alarm code, a unit that will not start, or a unit that runs but does not pull the box down to set point. We read the codes on Thermo King and Carrier Transicold units, check the controller, and trace the fault to the component. A unit that short cycles, stays in high speed, or shuts down on low oil or high discharge pressure gets a full check of the refrigeration side and the engine side before any parts go on.

Refrigeration System Repair

We repair and replace compressors, condenser and evaporator coils, expansion valves, receiver driers, solenoid valves, and pressure switches. We find refrigerant leaks, repair the line or fitting, evacuate the system, and recharge it to the correct weight. Low charge, a plugged drier, or a stuck hot gas valve are common reasons a trailer loses temperature on the road.

Reefer Engine and Fuel System

The small diesel on the trailer needs the same care as the truck engine. We service fuel filters, fuel pumps, injectors, glow plugs, starters, alternators, belts, and coolant systems. A unit that cranks and will not fire is often a fuel delivery or glow plug problem. A unit that starts and dies may have a low fuel level sensor fault, a plugged filter, or air in the fuel line. We also handle oil and filter changes on the unit at the interval the run hours call for.

Electrical and Controller Faults

Reefer units depend on the battery, the wiring harness, and a set of temperature and pressure sensors feeding the microprocessor. We test batteries and charging, repair chafed or corroded harness sections, replace failed sensors, and check standby electric power connections on units that plug in at the dock.

Air Flow and Defrost

A unit can run perfectly and still deliver a warm load if the air does not move. We check evaporator fan motors, defrost timers and sensors, the bulkhead, the air chute, and door seals. Ice on the evaporator, a torn chute, or a damaged seal will all show up as poor temperature in the back of the trailer.

Trailer Repairs

We also repair the trailer under the reefer unit: brakes, air lines, lights and wiring, landing gear, door hinges and latches, and tire changes. One call covers the cooling unit and the trailer it sits on.

Preventive Maintenance

Reefer units are serviced by run hours, not miles. A standard service covers oil and filters, fuel filters, belts, coolant, a refrigerant pressure check, a defrost cycle test, and a pull-down test. Scheduled service at the yard keeps a trailer from failing with a load on it.

Loaded Trailer Calls

When a trailer with product on board loses temperature, the load is the priority. Tell us the set point, the current box temperature, and the alarm code when you call so the technician arrives with the right parts. Call Salem Mobile Truck Repair at (971) 715-2497.