Reefer Unit Repair — Thermo King & Carrier
Trailer refrigeration units · Diagnostics & repair · Zion, IL, 3 minutes off I-94
Reefer Problems We Fix
- Unit not cooling or not holding set temperature
- Unit will not start, shuts down or keeps throwing alarm codes
- Controller and electrical faults, sensors, wiring and connectors
- Reefer engine service: oil, filters, belts, starting and charging
- Refrigerant leaks, defrost and airflow problems
Thermo King and Carrier Units
We work on the two most common trailer refrigeration brands, Thermo King and Carrier Transicold. Tell us the model and the alarm code when you call, and we will tell you what to expect before you drive over.
Reefer Trailer Repair in the Same Shop
A reefer load does not care which part failed. Besides the unit, we repair the trailer: doors and seals, lights, air lines, ABS, brakes, floors and panels. See trailer repair for the full list.
Broke Down With a Load?
Call (224) 588-3442 and tell us where you are. If the unit can be fixed on the spot, we can send mobile service. If not, we can tow the trailer to our shop.
One Shop, Done Right
The two reefer brands you see on most trailers.
Refrigeration unit, doors, lights, brakes and air system in the same visit.
We find the cause and quote the job before replacing parts.
Easy in and out between Chicago and Milwaukee.
4.9★ from 360+ Google Reviews
“I’ve been to a lot of shops, and RT Group is one of the few that actually does what they say. Rolled in with an issue on my trailer — no lights, busted wire. They got me in quick, showed me exactly what was wrong, and had it fixed that same day.”
“Brought my Freightliner Cascadia to RT Group after an air leak and brake issues. The mechanics found the problem quickly, explained what needed to be repaired, and got the truck back on the road the same day. No guessing, no unnecessary work, no surprise charges.”
“Great people working. Very professional and do quality work. We came in for some electrical issues on the trailer after another road service made a big mess there. They found the problem and fixed it quickly. Highly recommend this place.”
Common Questions
Do you repair Thermo King and Carrier reefer units?
My reefer is not cooling. Can you help?
Do you service the reefer engine?
Can you repair the reefer trailer too?
Where are you located?
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Ready When You Are
Call now to talk to a live person, or request a quote and we'll follow up fast.