Reefer Temperature Claims: Anatomy of a Cold-Chain Dispute
Reefer temperature claims are decided by documentation: the required temperature on the BOL, the unit's continuous temperature download, pulp temperatures at loading and delivery, and the pre-cool record. The strongest carrier defenses are a clean log, shipper-load-and-count notation, and documented warm product at pickup. Equipment failure is generally not a Carmack defense — the refrigeration breakdown endorsement on the cargo policy is the financial protection. Informational only, not legal advice.
A reefer claim rarely looks like a wreck. There is no bent trailer, no spilled freight — just a receiver with a thermometer, a load of produce or pharmaceuticals, and a rejection slip that says the product arrived out of temperature. Then comes the claim, and the entire dispute plays out in numbers: set points, download logs, pulp temps, and ambient readings.
Cold-chain claims are the most technical cargo disputes in trucking, and they are decided by documentation more than testimony. The carrier who can produce a continuous temperature log, a matching set-point record, and pulp temperatures at delivery wins far more often than the carrier who says 'the reefer was running fine.'
This guide walks through how temperature claims are built, how carriers defend them, and where insurance fits. Informational only — not legal advice.
How a Temperature Claim Starts
It starts at the dock with a rejection or a partial acceptance. The receiver takes pulp temperatures — the internal temperature of the product, measured with a probe — and compares them to the required range on the bill of lading or rate confirmation. If the readings are out of range, the receiver notes the exception, and the claim machinery starts: photos, temperature readings, a written notice, and eventually a demand for the value of the rejected product.
What makes these claims expensive is that the product is often not visibly damaged. A load of berries at the wrong temperature for six hours may look perfect and still be rejected, because the receiver cannot sell product with a compromised cold chain. The loss is the full invoice value of the rejected freight, and on pharmaceutical or high-value food loads that number gets large fast.
Your first job when a temperature dispute starts is to freeze the record: download the reefer's temperature log immediately, preserve the set-point documentation from dispatch, and get the driver's written account of the trip — fuel stops, door openings, alarms, and any unit issues. Memory fades; the log does not.
The Documents That Decide the Claim
Four documents carry nearly every temperature claim. First, the bill of lading or rate confirmation showing the required temperature — this is the standard you are measured against, so confirm what it actually said before arguing about whether you met it. Disputes over whether the requirement was '34 degrees continuous' or '34 degrees, plus or minus 2' are common and consequential.
Second, the reefer unit's continuous temperature download: supply-air and return-air temperatures across the trip. A clean, continuous log at the set point is the strongest defense in cold-chain freight. Gaps, spikes, or a log that shows the unit in start-stop mode when continuous was required will be Exhibit A for the other side.
Third, pulp temperatures at loading and delivery — the product's actual temperature, not the air around it. Product loaded warm is the classic carrier defense: if the pulp temp at pickup was already above the required range, the cold chain was broken before you took custody. Fourth, the pre-cool record: was the trailer pre-cooled to the set point before loading, and is that documented? A warm trailer loaded with properly cooled product still produces a claim.
Carrier Defenses That Actually Work
The strongest defense is the clean log: continuous temperature data showing the unit held the set point for the entire trip, supported by matching pulp temps at delivery. When the air stayed at set point and the product still arrived warm, the defense writes itself — the product was loaded warm, or the product generated its own heat (respiration in fresh produce), which points to shipper-side causes.
The shipper-loaded defense matters enormously in reefer work. On shipper-load-and-count trailers, you never saw the product. If the bill of lading says 'shipper load and count' and your log is clean, the burden shifts hard toward the shipper to explain how properly loaded product went bad in a properly running trailer. This is why noting 'SLC' on the BOL is not paperwork trivia — it is a defense.
Inherent vice is the doctrinal cousin: some products spoil on a normal transit through no fault of the carrier — overripe produce, product near the end of shelf life, goods with latent defects. The defense requires evidence the product's condition, not your temperature control, caused the loss: loading pulp temps, product age, and sometimes expert analysis. It is real but harder to prove than a clean log.
Set-Point Disputes and Communication Failures
A surprising share of reefer claims are not about equipment at all — they are about the wrong set point. Dispatch says 34, the rate con says 36, the driver sets what the shipper's loader told him at the dock, and the receiver rejects at 35. Everyone followed instructions; the instructions disagreed. The fix is procedural: the set point on the rate confirmation governs, and any change at the dock gets confirmed in writing before the doors close.
Start-stop versus continuous mode causes the same kind of dispute. Some commodities require continuous airflow; running start-stop to save fuel on a continuous-mode load produces temperature swings that show up in the log as a sawtooth pattern. If the BOL specifies the mode, follow it. If it does not, continuous is the safer default for sensitive freight — and document the choice.
Multi-temperature and multi-stop loads multiply the risk: doors opening at each stop, different set points for different compartments, receivers disputing which product went warm when. On multi-stop reefer loads, log door openings and compartment temps at every stop, and get each receiver's pulp readings in writing before you leave the dock.
Equipment Failures and the Breakdown Endorsement
Sometimes the unit genuinely fails — a compressor dies in west Texas in July, and the load is lost. Under Carmack, equipment failure is generally not a defense; the carrier is liable for the freight regardless of why the reefer quit. Your protection against this risk is insurance, specifically the refrigeration breakdown endorsement on your motor truck cargo policy.
Here is the trap: many cargo policies exclude losses from refrigeration breakdown unless the endorsement is added, and some add it with conditions — like requiring the unit to be under a certain age or serviced on schedule. A carrier hauling reefer freight without the breakdown endorsement is self-insuring every compressor failure. Check your policy before the next produce season, not after the first claim.
When a breakdown happens in transit, your duty to mitigate kicks in: notify dispatch and the shipper immediately, attempt repair or relay the load, and document every step. A carrier who catches a failing unit early, transfers the load to a working trailer, and saves half the freight has a much smaller claim than one who kept driving. Our cargo salvage and mitigation guide covers the doctrine.
Preventing the Next Temperature Claim
Prevention is a checklist, not a philosophy. Pre-cool the trailer to the set point before arrival and document it. Verify the set point and mode against the rate confirmation — not against what someone said at the dock. Take pulp temperatures at loading; refuse or note product loaded warm. Confirm the unit is in the right mode and the doors seal. Run continuous on sensitive freight.
During transit, the driver monitors the unit at every stop: check the display, listen for alarms, confirm it is actually running rather than assuming. Modern telematics can push temperature alerts to dispatch — if you haul reefer regularly, that visibility pays for itself the first time it catches a failing unit at 2 a.m. instead of at delivery.
At delivery, take pulp temperatures yourself before the receiver does, photograph the readings, and get any exception noted on the delivery receipt in the receiver's hand or yours. If the receiver rejects, do not leave without written documentation of what was rejected, the readings taken, and who took them. Then call your insurer promptly — temperature claims grow when they sit.
Key takeaways
- Temperature claims are won on documents: BOL requirement, continuous log, pulp temps, pre-cool record.
- A clean continuous log at set point is the strongest carrier defense.
- Note 'shipper load and count' on the BOL — you never saw inside the trailer.
- Take pulp temps at pickup; warm-loaded product is a defense only if documented.
- Confirm set point and mode in writing — dock verbal instructions cause disputes.
- Refrigeration breakdown needs its own policy endorsement; the base policy often excludes it.
Questions carriers ask
What is a pulp temperature?
The internal temperature of the product itself, measured with a probe thermometer — as opposed to the air temperature in the trailer. Receivers use pulp temps to accept or reject cold-chain freight, and they are a key document in any temperature claim.
Can a carrier win a temperature claim with a clean reefer log?
Often. A continuous log showing the unit held the set point, supported by matching pulp temps, is the strongest defense — it points the cause at the product or the loading rather than the carrier's temperature control.
What if the product was loaded warm?
Product loaded above the required temperature is a strong carrier defense, but only if documented — pulp temps at pickup are the evidence. Without them, it is your word against the shipper's.
Does cargo insurance cover reefer breakdown?
Only if the policy includes the refrigeration breakdown endorsement. Many base cargo policies exclude it. Verify the endorsement, its conditions, and its limit before hauling temperature-controlled freight.
Who sets the temperature — dispatch or the shipper?
The rate confirmation or bill of lading governs. Verbal instructions at the dock should be confirmed in writing before the doors close, because set-point disputes are a leading cause of reefer claims.
Is this legal advice?
No — this is an informational guide to how cold-chain claims work. Real disputes turn on facts and current law; consult a transportation attorney for a specific claim.