Refrigerated trailers are some of the most critical pieces of equipment you will find on the road. In addition to traditional trailer PMs, the cooling units, most often Thermo King® or Carrier®, must be managed for routine maintenance, increasing the likelihood that refrigerated carriers can deliver the promises to their customers. In fact, when you consider the potential loss of revenue and valuable customer goods, spending the dollars to maintain refrigeration units is an incredibly wise and recommended investment.