Reefer trailer repair

A tight box holds temp. We keep it tight.

Doors, gaskets, insulation, floors, lights, electrical, and brakes on reefer trailers for fleets and owner-operators. We keep the trailer sealed and road-ready so the cooling unit can do its job.

Call (865) 523-1115 Request a quote

A reefer is only as good as the box around it. A blown door gasket, a scored floor, or failing insulation lets cold out and product temps drift — even when the cooling unit is running perfectly. Knox Trailers handles the trailer side of reefers: doors, gaskets, insulation, floors, lights, wiring, and brakes. We keep the box sealed, the lights legal, and the trailer road-ready. For the refrigeration unit itself — the Carrier or Thermo King — we'll point you to a unit specialist.

Reefer work we handle

Door and gasket service

Reefer door gaskets, hinges, latches, and seals. A worn gasket is the most common reason a box stops holding temp. We replace and adjust so the door seals tight.

Insulation and panel repair

Damaged insulation, delaminated panels, and interior liner repair. We close the gaps that let cold leak out of the box.

Floor repair

Floor scoring, duct-floor and T-rail repair, and section replacement so air moves the way it should and the floor holds up under load.

Lights and electrical

Trailer lighting, wiring harnesses, connectors, and marker and clearance lights. The trailer-side electrical that keeps you legal at roadside.

Brakes and running gear

Air brakes, slack adjusters, chambers, suspension, and tires — the same trailer systems we service on every dry van and flatbed.

Structural and body repair

Rear frames, doors, walls, and skin damage. Collision and wear repair that keeps the box square and sealed.

Schedule the work or get a quote.

Mon–Fri 7am–5pm. Same-day appointments most weeks.

(865) 523-1115 Request a quote

What good looks like

When you bring a trailer to Knox Trailers, here's what you should expect.

Diagnosis within 60 minutes of arrival
Photos and explanation of the actual problem before any work starts
Most reefer trailer repairs completed same day for fleet customers
Door and gasket work that seals tight the first time
Lighting and brakes verified before you leave the lot
Service records compatible with fleet maintenance audits

Why fleets bring reefer trailers to us

A reefer that won't hold temp is often a trailer problem — a blown gasket, a scored floor, failing insulation — not a unit problem. Plenty of shops chase the cooling unit and never check the box. We start with the box, because that's usually where the cold is escaping.

We also understand the business side. A reefer that won't hold temp isn't just a maintenance problem — it's a relationship problem with your shipper. We work fast for that reason. Most trailer repairs other shops would schedule out a week, we knock out in a day.

Common questions

Do you repair the refrigeration unit itself?

No — we handle the trailer side of reefers: doors, gaskets, insulation, floors, lights, wiring, and brakes. For the cooling unit itself (Carrier, Thermo King, and the like), we'll point you to a unit specialist. Often the temp problem turns out to be the box, not the unit — and that part we fix.

My reefer isn't holding temp — can you help if the unit checks out?

Yes, and that's exactly our lane. If the cooling unit runs fine but temps still drift, the box is leaking cold — a worn door gasket, damaged insulation, or a scored floor. We seal it back up.

What if my reefer trailer is down and I'm not in Knoxville?

Mobile service is available across our service area. We dispatch a truck with common trailer parts and tools for door, light, electrical, and brake work. For longer distances, we'll triage by phone and help you find a closer shop.

Ready to get it fixed?

Same-day appointments most weeks for fleet customers. Call or request a quote and we'll get you scheduled.