Booking Reefer Freight: A Broker's Guide

Reefer freight is one of the most profitable segments a broker can move—and one of the easiest to get burned on. Temperature-controlled loads carry higher rates, but they also carry higher risk. A single mistake on a temp setting or a carrier's failing unit can turn a $3,000 load into a $40,000 claim.

If you're moving into reefer or want to book it more confidently, this guide covers what makes reefer different from dry van, where the risk lives, and how to protect your brokerage and your margin.

What Makes Reefer Different

A reefer is a trailer with a refrigeration unit that maintains a set temperature for the cargo inside. That sounds simple, but the operational details are where brokers get tripped up.

Unlike dry van, where the load is either on the trailer or it isn't, reefer freight has an entire second dimension: the condition of the product on delivery. The freight can arrive on time, undamaged by handling, and still be rejected because it ran two degrees warm. That risk is yours to manage as the broker in the middle.

Temperature Settings: Continuous vs. Cycle-Sentry

Every reefer load runs at a set temperature, but there are two ways the unit can run to hold it:

• Continuous mode runs the reefer engine constantly, circulating air the entire trip. This holds the tightest, most even temperature and is required for sensitive products like fresh produce, meat, and pharmaceuticals.
• Cycle-Sentry (or start/stop) mode shuts the unit off once the set temperature is reached and restarts it when the temperature drifts. It saves fuel but allows more temperature swing, which is fine for frozen product but can spoil temperature-sensitive fresh goods.

This is not a detail to leave to the carrier's judgment. The shipper specifies the run mode, and you must relay it exactly. Booking a fresh produce load and letting a driver run cycle-sentry to save fuel is a claim waiting to happen.

Pre-Cooling

A reefer unit cools air—it does not remove heat from warm product quickly. If a driver backs into a dock with a trailer at 70 degrees and loads product that needs to be at 34 degrees, the unit will fight that heat for hours and may never fully recover.

The trailer should be pre-cooled to the required temperature before loading. Confirm with the carrier that the driver will pre-cool, and make sure the shipper's product is already at temp when it's loaded. Reefers maintain temperature; they don't fix product that was loaded warm.

Produce and Food-Safety Considerations

Most reefer freight is food, and food comes with rules. Two things every broker should understand: the FSMA Sanitary Transportation rule and the reality of produce rejection.

Under the FDA's Sanitary Transportation of Human and Animal Food rule, shippers, carriers, and brokers all share responsibility for keeping food safe in transit. Practically, that means temperature requirements must be communicated in writing, the equipment must be capable of holding them, and records need to be kept. As the broker, you're the communication hub—if a temp requirement never made it onto the rate confirmation, that's on you.

Produce receivers are strict. A load can be rejected for pulp temperature, appearance, or a broken cold chain even when the reefer ran perfectly. When product is rejected, the money is at stake immediately, and that's where PACA comes in.

PACA Basics

The Perishable Agricultural Commodities Act (PACA) governs the buying, selling, and transportation of fresh and frozen fruits and vegetables. Brokers who handle produce should know the basics because PACA disputes move fast and involve real money.

• PACA establishes a trust that protects produce sellers, giving them priority claim to proceeds if a buyer fails to pay.
• Disputes over rejected or damaged produce are often resolved through USDA inspections, which document the condition of the load at delivery.
• When a load is rejected, an official USDA inspection is usually required to establish whether the product actually failed to meet standards—verbal claims from a receiver aren't enough.

The practical takeaway: if a produce load is rejected, insist on a USDA inspection before anyone starts disposing of or discounting the product. Without documentation, you have no leverage on the claim.

Reefer Breakdown and Claims Risk

Reefer units are mechanical, and mechanical things fail. A unit that quits in transit on a summer run can ruin a full trailer of product in a few hours. This is the single biggest risk that separates reefer from dry van.

Two things protect you here:

1. Carrier insurance that actually covers reefer breakdown. Standard cargo policies often exclude losses from reefer malfunction unless a specific breakdown endorsement is in place. Verify the carrier carries reefer breakdown coverage—not just a cargo limit that looks adequate on paper.
2. Temperature documentation. Modern reefers log temperature data. That download is your evidence. If a claim arises, the temp log tells you whether the unit held the set point or the product was loaded warm to begin with.

When a breakdown happens mid-transit, the driver should get to a repair shop immediately and communicate. Speed matters—a unit repaired in an hour may save the load; a driver who keeps rolling to "make the delivery" can turn a repairable problem into a total loss.

Why Rates Run Higher and How Seasonality Works

Reefer rates run higher than dry van for good reasons: the equipment costs more, fuel burn is higher because the unit runs continuously, and the carrier is taking on more risk. Brokers should expect to pay a premium and should build that into shipper rates rather than trying to squeeze carriers below what the market bears.

Reefer is also intensely seasonal. The dominant driver is produce season, which sweeps north across the country as different regions harvest:

• Capacity tightens dramatically during peak produce months, especially out of high-volume regions like California, Florida, Texas, and the Pacific Northwest.
• Rates can spike quickly when harvest volume surges and every available reefer is booked.
• Produce loads often compete with, and outbid, other reefer freight during peak weeks, so plan your capacity early.

Knowing where produce season is at any given moment tells you where capacity is scarce and where you'll pay up. Brokers who track this stay ahead of rate spikes instead of getting caught by them.

What to Capture on the Rate Confirmation

The rate confirmation is your protection. On a reefer load, a vague rate con is a liability. Every temperature-related instruction must be in writing so there's no ambiguity about what the carrier agreed to. Capture:

• The exact set temperature, with units (34°F, not "keep it cold")
• Run mode: continuous or cycle-sentry
• Pre-cooling requirement before loading
• Whether the driver must maintain and provide the temperature download
• Any receiver-specific requirements or appointment windows
• Instructions for what to do if the unit fails in transit and who to call

If it's not on the rate con, it didn't happen as far as a claim is concerned. Spelling out the temp and run mode in writing is the cheapest insurance you'll ever buy.

How to Vet Reefer Carriers

Not every carrier that hauls dry van should be trusted with reefer. Before booking, confirm:

1. Reefer breakdown coverage. Pull the certificate of insurance and verify the breakdown endorsement, not just the cargo limit.
2. Equipment age and condition. Reefer units have run hours the way engines have miles. Ask about the age of the unit and whether it's well maintained.
3. Reefer experience. A carrier that runs produce regularly understands pre-cooling, run modes, and pulp temps. A carrier new to reefer may not.
4. Authority and safety record. The same FMCSA vetting you do on any carrier applies here—active authority, clean safety scores, and no red flags.
5. Willingness to communicate. Reefer loads need proactive drivers. A carrier that's responsive on the phone before the load is more likely to call you the moment a unit acts up.

Reefer freight rewards brokers who do the homework. The margins are there, but they come with responsibility for the cold chain from pickup to delivery.

The Bottom Line

Reefer is a great segment for brokers willing to master the details. Get the temperature setting and run mode right, insist on pre-cooling, understand PACA before you touch produce, verify breakdown coverage, and put every instruction on the rate confirmation.

Do that consistently, and reefer becomes one of the most reliable margin drivers in your book—instead of the source of your next big claim.