Cargo & Freight · Driver Training VideoReefer Trailer Operations

Here's the reality: a reefer load doesn't run on your judgment call, it runs on temperature. One lapse — a bad setpoint, a door left open too long — and the load can get rejected at the dock. That rejection often comes back on the carrier — and on you.

So start before the freight ever touches the trailer. Pre-cool the box. Set your unit to the temperature on the paperwork and let the trailer actually reach that setpoint before the first pallet goes in.

Know your unit — Thermo King or Carrier — and set the exact number off the paperwork, not a round number that's close enough.

Loading is where a lot of claims start. Product needs airflow, not just cold air sitting in the box. Keep it off the floor and on the air chute, keep the front bulkhead and the return-air path clear, and don't stack tight to the ceiling or jam pallets against the rear doors.

Before you roll, pre-trip the reefer like it's part of the truck, because it is. Confirm the unit starts and runs clean, check fuel, check the belts, make sure the condenser coil is clear of debris, and confirm there's no active alarm.

If the unit alarms or quits on the road, move fast. Don't wait and hope it clears itself.

Your company standard: pre-cool before you load, run the setpoint straight off the paperwork, protect the airflow, pre-trip the unit every single time, and the moment something alarms, call it in — don't guess and don't wait it out.