Reefer Unit Repair

Transport Refrigeration & Mobile Reefer Repair & Service

Transport Refrigeration Repair & Service

Your truck is important to you and it is part of your business. Rapid Semi Repair has experience servicing Thermo King refridgeration unitand Carrier refrigerated trailer. Whether it is a single, multi temp or hybrid system, emergency reefer trailer repair for your downed reefer unit are services we provide in the Greater St Louis area.

Our Experienced technicians understand the value of time and getting you back on the road as soon and as safely possible. Getting your unit running is our top priority because there is no time to waste and we also understand that a load that needs refrigeration needs to be delivered on time or it goes bad and that would be a huge loss of time, cargo and money due to refrigeration failure.

Whether you are by the roadside or parked at a rest stop or in a shop, our emergency mobile repair services are ready to help we come to you and make sure you do not loose time. Without sacrificing quality of work and time, we strive to provide a fast turnaround to get you back on the road safely and as soon as possible.

Preventative Maintenance & Inspection Reefer Units

Every Trailer with a refrigerated auto unit needs regular maintenance, inspection and to also ensure the whole machinery is operating smoothly to ensure your trucks last the entire journey. We do not overlook any part of the job it is important to us to get you back on the road with confidence. Rapid semi mobile repair has all the tools needed to work on your Thermo king or Carrier refrigeration unit. It is recommended that regular maintenance of a refrigerated trailer by a trained refrigeration mechanic be performed every 1500 hours, 3000 hours and 4500 hours annually.

Our professional refrigeration mechanics check for everything required for reliable mobile refrigeration:

  • the refrigeration unit for adequate cooling
  • proper oil
  • working belts
  • visually inspecting the unit
  • cleaning any oil spills
  • clearing debris
  • making sure air flow is unobstructed, rotating fan motors and blades
  • tightening any electrical connections and more

Maintenance and Inspection

It is recommended that regular maintenance of a refrigerated trailer by a trained refrigeration mechanic be performed every 1500 hours, 3000 hours and 4500 hours annually.


  • Run Pre trip test
  • Check Engine, engine oil level
  • Check engine oil pressure hot, on high speed.
  • Check and adjust engine speeds
  • Check engine mounts for wear.
  • Change engine oil and oil filter (hot).
  • Check fuel supply
  • Inspect belts for condition, and proper tension.
  • Listen for unusual noises, vibration, etc.
  • Check air cleaner restriction indicator.
  • Drain water from fuel and check vent
  • Inspect/clean fuel transfer pump inlet strainer
  • Check condition of drive coupling bushings.
  • Replace fuel filters/water separator.
  • Change ELC (red) engine coolant every 5years or 12,000 hours.
  • Test fuel injection nozzles at least every 10,000 hours.


  • Check refrigerant level
  • Check for proper suction pressure.
  • Check compressor oil level and condition.
  • Check compressor efficiency and pump down refrigeration system.
  • Replace dehydrator and check discharge and suction pressure every (2) years.


  • Inspect battery terminals and electrolyte level.
  • Inspect wire harness for damaged wires or connection.
  • Check operation of damper door.
  • Inspect alternator wire connections for tightness.
  • Inspect electric motor; replace bearings yearly or every 6,000 hours.


  • Visually inspect unit for fluid leaks
  • Visually inspect unit for damaged, loose or broken parts.
  • Inspect tapered roller bearing fan shaft and idlers for leakage and bearing wear
  • Clean entire unit including condenser and evaporator coils and defrost
  • Check all unit and fuel tank mounting bolts, brackets, lines, hoses etc.
  • Check evaporator damper door adjustment operation