Temperature-controlled freight is one of the higher-stakes categories in logistics. A single shipment gone wrong (a reefer unit that failed, a carrier that didn’t pre-cool the trailer, or a delay that pushed product out of spec), and you’re dealing with a total loss and a customer relationship problem.
Most shippers learn what questions to ask after something goes wrong. This post is designed to help you ask them before.
The Basics: What Makes Refrigerated Shipping Different
Refrigerated trucking, commonly called reefer freight, uses trailers equipped with refrigeration units to maintain a controlled temperature environment during transit. Depending on your product, that might mean maintaining between 34 and 38°F for fresh produce, keeping pharmaceuticals at a precise range, or holding frozen goods at 0°F or below.
The carrier isn’t just providing a truck. They’re providing an actively managed environment. That means the equipment condition matters, the driver’s loading and pre-cooling protocols matter, and the carrier’s process for handling temperature excursions matters.
Questions to Ask Any Refrigerated Carrier or 3PL
How do you verify trailer temperature before loading?
Pre-cooling a reefer trailer takes time, typically 1–2 hours before loading. Carriers who skip or rush this step are introducing risk from the first mile. Ask for their standard protocol.
What temperature monitoring do you use in transit?
The standard today is continuous temperature logging, usually with downloadable reports available post-delivery. Some carriers offer real-time visibility. If a carrier can’t give you temperature data after the fact, that’s a gap in your chain of custody.
How do you handle temperature excursions?
If the reefer unit malfunctions or temperatures deviate, what’s the protocol? Do they notify you immediately? Do they have backup equipment? Is there a decision tree for whether freight should be held, diverted, or delivered? A good carrier has a written answer to this question.
What’s your claims process for temperature-related losses?
Freight claims for temperature damage can get complicated, especially if the shipper, carrier, and consignee all disagree about when the excursion occurred. Ask specifically how they document temperature during loading, transit, and delivery and how disputes get resolved.
Are your drivers trained on reefer equipment operation?
Reefer trailers require specific handling knowledge: how to set and check the temperature controller and how to handle the product if there’s an equipment issue on the road. Driver training varies significantly between carriers.
LTL vs. FTL for Temperature-Controlled Freight
Temperature-controlled LTL exists and can work well for smaller shipments, but it introduces additional complexity. Your freight shares a trailer with other temperature-controlled freight, which may be set to a different temperature range. Most LTL carriers operating reefer will have multi-temp capability, but it’s worth confirming.
FTL gives you full control of the temperature environment and eliminates the additional handling points of LTL consolidation, both meaningful factors for high-value or highly perishable products.
What to Know About Transit Time in Reefer
Temperature-controlled freight is more time-sensitive than dry freight in most cases. Build in a buffer for transit time variability, especially on longer lanes. A delay that’s a minor inconvenience for a dry goods shipment can be a product-at-risk situation for refrigerated freight.
If you’re on a lane where transit time is consistently tight, talk to your 3PL about whether dedicated or expedited service is warranted.
Qualifying Your 3PL for Refrigerated Freight
Not every 3PL has deep experience in temperature-controlled freight. Ask specifically:
- What’s their volume of reefer freight? Which carriers do they use?
- Do they have preferred carrier relationships with reefer specialists?
- Can they provide temperature reports from past shipments?
- Have they handled your specific commodity before?
Experience in temperature-controlled logistics is genuinely specialized. Treat it that way.