A reefer trailer inspection checklist covers two jobs at once: the roadworthiness checks every trailer needs, and the cold-chain checks that decide whether the load arrives at temperature. The first set keeps the truck legal. The second keeps the cargo sellable, and the records from both are what shippers and the FDA ask to see. This page has 31 tick boxes arranged by the clock of a load, from pre-cooling to delivery, plus a unit and box walkaround. Schedule a call to set up your reefer fleet's checklist, or start with the standard DOT pre-trip checklist for the chassis items.
REEFER INSPECTIONS · DRIVERS, DISPATCH AND COLD-CHAIN MANAGERS
A Warm Load Is a Rejected Load. Inspect to the Clock.
Most reefer problems show up long before the trailer is loaded. Follow the five moments of a load and write each reading down while it still matters.
THE FIVE MOMENTS OF A LOAD
1Before loading
2At the dock
3Loaded
4En route
5At delivery
The Load Clock: Five Moments, Fifteen Checks
Each moment has three checks. Tick a box only after you have looked at the reading or the part, and note the time.
1
BEFORE LOADING
Pre-cool the box
- Reefer fuel level checked and water-free
- Setpoint matches the shipper's instruction
- Trailer reached setpoint before the doors open
2
AT THE DOCK
Check the box itself
- Interior clean, dry and odor-free
- Floor drains clear, T-floor and air chute intact
- Door seals continuous with no gaps
3
LOADED
Confirm and record
- Probe readings checked and logged at loading
- Load kept off the air chute and bulkhead
- Seal applied and number recorded
4
EN ROUTE
Watch the unit
- Controller shows no active alarms
- Return and discharge temperatures in range
- Fuel and temperature checked at each stop
5
AT DELIVERY
Prove the chain
- Temperature recorded before the doors open
- Any excursion noted with time and action
- Report and temperature log saved
What a Healthy Temperature Log Looks Like
Auditors and shippers read the log as a shape. These four parts are the ones to look for, and the same shape tells a driver when something is wrong. The chart is an illustration, not real data.
1
Pre-cool
The trailer comes down to setpoint before loading.
2
Loading
Doors open and the trace spikes. It should recover quickly.
3
Steady
A flat trace close to setpoint all the way to the dock.
4
Drift
A slow climb away from setpoint means check the probe, seal or defrost.
The Unit and Box Walkaround
Do this before the pre-cool starts, and record the hour meter reading so service is scheduled from run time, not miles.
REFRIGERATION UNIT
- Reefer fuel level (separate from tractor tank)
- Fuel free of water
- Drive belts free of fraying or glazing
- Engine oil and coolant levels
- Battery terminals tight and charged
- No oil, fuel or coolant leaks
- Controller alarms cleared, no active codes
- Hour meter reading recorded
TRAILER BOX
- Air chute intact along the full length
- T-floor return path unblocked
- Door seals and gaskets continuous
- Floor drains clear, floor dry
- Bulkhead and curtains undamaged
- Interior walls and roof free of holes
- Evaporator free of ice build-up
- Temperature probes read true
Need the temperature log and the DVIR in one place?
Tell us which loads you haul and we will build the five-moment checklist around your shippers' instructions.
What to Do When a Check Fails
Decide the rule in advance so a driver does not have to guess at 4 a.m. Swipe the table horizontally on mobile.
← Swipe to see all columns →
| Finding | Why it matters | Action | Level |
|---|---|---|---|
| Trailer above setpoint at loading | Load starts warm | Hold the load | Hold |
| Door seal torn or gapped | Warm air leaks in, ice forms | Repair or swap the trailer | Hold |
| Reefer fuel low or water in fuel | Unit can stall en route | Fuel or drain before dispatch | Fix first |
| Active controller alarm | Unit may not hold temperature | Clear it or send to the shop | Fix first |
| Air chute torn or blocked by cargo | Uneven cooling in the box | Repair it or reload the cargo | Fix first |
| Drain clogged or floor wet | Contamination and odor risk | Clean and clear before loading | Report |
| Faded reflective tape | Roadside defect, not a cold-chain risk | Replace at next service | Monitor |
What the FDA Expects for Food Loads
The FSMA sanitary transportation rule applies to carriers and loaders moving food. It does not replace the DVIR, but it adds three expectations that the reefer checklist should support. Read the FDA summary.
EQUIPMENT
Fit for the food
Vehicles must be suitable for the load, easy to clean and capable of holding the temperature the food needs.
TEMPERATURE
Control it, and show it
Transport operations need adequate temperature controls. The log is how you demonstrate it.
RECORDS
Keep what you agreed to
Carriers keep records of written procedures, agreements and training, for up to 12 months depending on the record.
Keep the Cold Chain on Record, Not in the Driver's Memory
FleetRabbit's mobile DVIR puts the unit, box and load-clock checks on the driver's phone, asks for a photo on any failure, and stores every report with a timestamp. Defects go to the shop as work orders, so a failed seal or alarm is fixed before the next load. Read the federal report rule.
Unit and box checks
Five-moment load clock
Photo on every failure
Reports stored and searchable
Frequently Asked Questions
What should a reefer trailer inspection checklist include?
The standard trailer checks, such as tires, brakes, lights, coupling and doors, plus reefer fuel, belts, controller alarms, setpoint, pre-cool, air chute, floor, door seals, drains and probe readings.
What should the setpoint be?
It depends on the product, so follow the shipper's written instruction. The driver's job is to confirm the unit matches it and record the reading.
Why check the reefer fuel separately?
The refrigeration unit usually has its own diesel tank, separate from the tractor's. Running it dry or taking water in the fuel can stall the unit mid-route.
Should reefer service be based on miles or hours?
Hours. The unit's engine runs whether or not the truck moves, so schedule service from the controller's hour meter, and record it at each inspection.
Does the DVIR still apply to reefer trailers?
Yes. The driver's report covers the whole combination, and any defect must be reported in writing. Read 49 CFR 396.11. FSMA records are in addition to it.
Is a reefer inspection PDF enough?
A PDF works as a template, but paper is easy to lose and a temperature reading is only useful if it is recorded at the time. A digital form timestamps each entry. Schedule a call to see how it works.
What does FleetRabbit cost for reefer fleets?
FleetRabbit is free for up to three vehicles and $5 per vehicle per month after that. Inspect your first reefer free.
Check It Cold, Log It Once
A driver who follows the five moments catches the failed seal, the empty fuel tank and the warm trailer before the product is on board. Give them the clock and give your shop the record.
Free tier for up to 3 vehicles · No credit card required · Reports stored with timestamps
October 9, 2026By Alex Rowan
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