This temperature variance far surpasses what we would consider to be a normal variance for return air readings. Here the return air readings from the reefer unit’s download indicate that the air temperatures within the trailer exceeded the temperatures the carrier was instructed to maintain by 7 to 12☏ throughout the entire trip. Although the supply air readings appear normal, it must be remembered that reefer units are expected to cool the length of the trailer-not just supply air sufficient to cool the supply air sensors.įor this reason, the return air temperature readings tend to be more significant when warm temperatures are alleged. Unfortunately, no portable temperature recorder was placed on board, but the download from our reefer unit shows our driver entered the proper set point and that the unit was supplying air at the instructed temperatures.Īlthough the return air readings are high, we believe this is a result of the field heat coming from the product and not any failure on our part.”īased on the information provided, it appears that the reefer unit failed to maintain transit temperatures as required by the contract of carriage. Department of Agriculture inspection certificate showed warm pulp temperatures and condition problems with the produce. We recently hauled a load of mixed vegetables from a shipper in Texas to a receiver in New York. The Solution: Carriers are responsible for cooling the trailer, regardless of any field heat or respiration from the product. The Key Point: Return air temperatures are a better reflection of air temperatures within the trailer than supply air temperature readings. The Problem: Return air temperature readings show warm temperatures.
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