A reefer unit is a machine, and machines quit. When one quits with a load of frozen food or produce behind it, the freight is the loss, and ISO’s motor truck cargo form says loss caused by breakdown of refrigeration equipment is not covered. Reefer breakdown coverage puts that peril back: cargo spoiled by a change in temperature after a sudden and accidental failure of the refrigeration or heating unit. It does not fix the unit, it is not theft coverage, and the trigger is the unit breaking: a driver who set the wrong temperature, switched the unit off or let it run out of fuel has not had a breakdown. Brokers ask for it by name on your certificate because their contracts make you responsible for the load from loading until delivery.
What standard cargo coverage leaves out
A motor truck cargo policy covers the freight you haul against the usual road perils: fire, collision, theft. ISO’s motor truck cargo carriers form is written on an open-perils basis, then takes refrigeration away: loss or damage caused by breakdown of refrigeration equipment is not covered. It separately excludes loss from extremes of temperature or gradual deterioration, and loss from delay or loss of market.
There is one carve-back: refrigeration loss caused directly by fire, lightning, explosion, windstorm, vandalism, theft or attempted theft, or an accident to the vehicle, which the form says it will pay for. A compressor that seized at mile 400 is excluded unless you have added the endorsement. What cargo insurance covers.
What the endorsement adds, and what it still doesn’t
Reefer breakdown coverage (also sold as refrigeration breakdown) sits in the cargo section of a trucking policy; Progressive calls it a reefer endorsement and says it is not standalone insurance. Sentry words the trigger as loss due to a change in temperature resulting from a sudden and accidental mechanical failure or breakdown of refrigeration or heating equipment. Heating counts, for a load that must not freeze. Not every insurer endorses it on: Great West’s Broad Form Cargo lists refrigeration breakdown, failure to fuel and maintenance of refrigeration equipment as inclusions it says are often excluded under standard cargo policies.
The trigger is the unit breaking, which is where disputes start. A reefer set to the wrong temperature, run in cycle mode when the shipper demanded continuous, switched off, or allowed to run out of fuel did not break down, and an endorsement triggered by a sudden and accidental breakdown is not written for that. Broader forms exist: Progressive says its Cargo Plus could still cover the spoiled goods if you forget to monitor the temperature. I read the trigger language on the form you are offered, not the name on it.
What underwriters ask for
Underwriters look at how likely the unit is to fail and how well you can prove what happened. Expect questions about:
- Age of the truck or trailer the unit is on. Cover Whale, for example, requires box trucks or trailers to be less than 10 years old to qualify for refrigeration breakdown.
- Maintenance records. Northland’s loss-control guidance: follow recommended inspection and maintenance procedures for the vehicle, trailer and refrigeration unit. Keep the schedule in writing; the adjuster will ask for it, and so will I.
- Pre-cooling and loading. Pre-cool the trailer to the required temperature before loading, which also proves the unit works. Pulp the product, note the required temperature on the bill of lading, and document it there again at delivery.
- Driver checks. Monitor the unit during the trip and keep enough fuel in it while the trailer sits unattended.
- The unit’s own data. A reefer’s data logger records setpoint, return-air and ambient temperatures, on/off events and operating mode; downloading it after a rejected load is routine.
If you haul food that needs temperature control for safety and your written agreement with the shipper makes you responsible for sanitary conditions, 21 CFR 1.908 sets the same standard: the shipper specifies the operating temperature in writing, pre-cooling included if needed; you pre-cool as specified, show on request that the temperature held (ambient readings at loading and unloading, or time/temperature data), and keep written procedures.
What shippers and brokers demand
Brokers ask for reefer breakdown by name: TQL’s carrier FAQ lists $1 million minimum auto liability, a $100,000 minimum cargo policy and reefer breakdown on the insurance certificate if applicable, and Progressive says many larger clients contractually require adequate cargo insurance. The contract behind it puts the load on you: TQL’s broker-carrier agreement in a 2023 Ohio appeals decision made the carrier fully responsible and liable for the cargo from loading until delivery, required reefer loads to run at the specified temperature on continuous rather than cycle mode, required the carrier to indemnify the broker and its customer for cargo claims, and let the broker offset a claim against what it owed the carrier.
The rate confirmation for a load of ice cream called for −20°F on continuous mode. The driver ran −19°F in cycle mode, the data logger showed the unit turned off shortly after loading, there was no evidence of mechanical failure, and the receiver rejected the entire load. The insurer denied the claim in part because the carrier never submitted documentation showing the reefer had malfunctioned, a condition for coverage. The broker credited its customer the $42,930 value of the load, offset the $1,900 it owed the carrier, and the court held the carrier had to indemnify the broker for the rest. The endorsement is written to respond to a proven breakdown, and the proof is yours to keep. How it shows up on a certificate of insurance.
What it isn’t: theft, and the unit itself
Two things get confused with it:
- Cargo theft. Theft is a separate peril in the base cargo form; the form’s refrigeration exclusion even carves back loss caused directly by theft or attempted theft.
- The reefer unit itself. Cargo coverage is for the freight, not the rig. A wrecked, burned or stolen truck or trailer is a physical damage question, collision or comprehensive, not a cargo claim. Reefer breakdown is for the spoiled freight, not the repair bill.
A reefer operation I write usually carries liability, physical damage, cargo with the reefer breakdown endorsement, and whatever limits its contracts call for. The full trucking policy and whether you need cargo coverage at all.
Common questions
Is reefer breakdown coverage required by law?
No federal rule requires it. The cargo filing requirement in 49 CFR 387.303 applies to household goods carriers ($5,000 per vehicle and $10,000 per occurrence), and the section sets no cargo figure for other carriers. For reefer loads the requirement comes from broker and shipper contracts: TQL, for one, asks for reefer breakdown on the insurance certificate when it applies, alongside its $100,000 cargo minimum.
Does it cover a load that spoiled because the driver set the wrong temperature?
Not on an endorsement whose trigger is a sudden and accidental breakdown of the unit: a wrong setpoint, the wrong mode, a unit someone switched off or an empty fuel tank is not a breakdown. Some insurers sell broader forms; Progressive says its Cargo Plus could still cover spoiled goods if you forget to monitor the temperature. Ask what the trigger language says.
What will the insurer want after a reefer failure?
Documentation that the unit malfunctioned: in practice the repair invoice, your maintenance records, the reefer’s data download showing setpoint, return air, on/off events and mode, and the temperatures recorded on the bill of lading at loading and delivery. In the 2023 Ohio case above, the insurer denied the claim in part because the carrier never documented a malfunction, and the carrier ended up owing the broker for the load.
Is it the same as cargo theft coverage?
No. Theft is a separate peril in the base cargo form. Reefer breakdown only addresses spoilage caused by the refrigeration or heating unit failing.
Does it pay to repair the reefer unit?
No. Cargo coverage is for the freight, not the truck. A truck or trailer damaged in a wreck, fire or theft is a physical damage question under collision or comprehensive; reefer breakdown is written for the spoiled freight, not the unit.
Sources
- 21 CFR 1.908 (LII): sanitary transportation duties for shippers and carriers, including the written-agreement condition, pre-cooling and temperature demonstration
- 49 CFR 387.303 (LII): the household goods cargo figures, and no cargo requirement for other carriers
- Godoy v. Total Quality Logistics, 2023-Ohio-4585 (Ohio Ct. App., 12th Dist., Dec. 18, 2023): agreement terms, the ice cream load, the insurer’s denial and the indemnity judgment
- FC&S (PropertyCasualty360): ISO motor truck cargo carriers form, open perils, refrigeration breakdown exclusion and carve-back, temperature and delay exclusions
- Sentry Insurance: the sudden and accidental mechanical failure or breakdown trigger, presented as part of its cargo policy
- Progressive Commercial: reefer endorsement, not standalone, Cargo Plus, larger clients’ contract requirements, collision and comprehensive
- Great West Casualty (Old Republic): Broad Form Cargo includes refrigeration breakdown, failure to fuel and maintenance; cargo covers fire and collision
- Northland Insurance: pre-cooling, pulping, bill of lading temperatures, maintenance procedures, monitoring and fuel
- Cover Whale: box trucks or trailers under 10 years old to qualify for refrigeration breakdown
- TQL carrier FAQ: $1 million auto liability, $100,000 cargo and reefer breakdown on the certificate if applicable
General information about reefer breakdown (refrigeration breakdown) cargo coverage as of October 2026, not legal or tax advice; your endorsement’s wording, your shipper and broker contracts and 21 CFR 1.908 control. Coverage depends on underwriting and the terms, conditions and exclusions of the policy actually issued.