Reefer Container Pre-Purchase Inspection Ontario

By Paul LeBlanc, owner, and Christian LeBlanc, second-generation operator, Van Blanc Ent. Inc.

Reading time: about 14 minutes.

Why Do Reefer Inspections Differ From Dry Box Checks?

A reefer inspection differs from a dry box check because a refrigerated container fails on small hidden faults, not obvious ones. A dry box shows rust holes at a glance. A reefer can look fine in the yard while a worn compressor or blocked drain only shows under load, which is why a full PTI cycle is the deciding test.

A standard 20ft or 40ft dry container fails on big visible things: a rust hole the size of a fist, a sprung door, a floor board that punches through. A reefer (refrigerated shipping container) fails on small invisible things. A capillary tube that whistles a fraction off pitch. A condensate drain stuffed with dried mango pulp from a 2019 banana run out of Costa Rica. A microprocessor that boots clean but won’t hold set point under load. None of that shows in a parking-lot walkaround.

If you are still weighing the basics of how a refrigerated container is built and what it can hold, start there, then come back for the inspection detail. Most Ontario buyers searching for a used reefer are coming from one of four lanes. Cannabis growers who need cold storage for cured flower at 4 to 8 degrees Celsius. Craft breweries staging kegs at 2 to 4 degrees. Greenhouse and produce operators wanting a chilled holding room for hardier crops. Pharmacy and lab buyers wanting a temperature-controlled inventory cell. Each of those buyers needs the unit to actually work for ten years, not look like it works on the day of sale.

That’s why the longer checklist we work through on every yard pickup takes longer on a reefer than on any dry box. We don’t sell a unit that hasn’t completed a full Pre-Trip Inspection (PTI) cycle in our yard with a clipboard recording each test result. Below is the same routine, written so an Ontario buyer can run it before paying anyone.

What Is the Three-Pass Method for Inspecting a Reefer?

The three-pass method is a reefer inspection split into three deliberate sweeps: a unit-off cold inspection, a controller-on dry run, and a full PTI under load. Christian walks every reefer with the buyer when they visit the yard. He runs the inspection in three deliberate passes rather than one wandering tour. Each pass has a job. Skip a pass and you miss a category of fault.

Pass one is the unit-off cold inspection. Steel exterior, hinge gear, door seals, panel skins, T-bar floor, condensate drains, evaporator coil visible through the return-air grille. The compressor sits silent, the lights stay off, you read the unit as a static object. This is where dents, repair welds on the front wall around the unit, and panel delamination show up. Closed eyes work better than open ones for some of this: run a palm along the inside wall and feel for cold spots where insulation has settled.

Pass two is the controller-on dry run. Plug in to 3-phase shore power. The display boots. The controller cycles through self-test. Sensors light up: supply air, return air, defrost, ambient, evaporator coil, condenser coil. Compressor stays off for the first three to four minutes while pressures balance. Then it engages and you listen.

Pass three is the full PTI. The unit runs a programmed cycle for anywhere from 20 minutes (Auto Short PTI 1) to 4.5 hours (Full PTI) depending on what the controller supports. Temperature pull-down is timed. Defrost cycle is forced. Heat strip is exercised. Alarms are checked and cleared. At the end you have a printout (or a controller-stored log) that says PASS or NO PASS by section.

If a seller refuses pass three, walk. The PTI is the only test that proves the unit holds set point under load, and that test costs nothing but time. A seller who won’t run it is a seller who already knows the result.

How Do You Inspect a Reefer Refrigeration Unit?

The four refrigeration unit manufacturers you will see on used Ontario stock are Carrier (Transicold, ThinLINE, NaturaLINE generations), Thermo King (Magnum, MP-4000, SLXi generations), Daikin (LXE10, ZESTIA), and Star Cool (Standard, Integrated). Mitsubishi MCI shows up occasionally on Pacific-routed boxes. Each manufacturer has its own quirks but the inspection language is shared.

The compressor is the single most expensive component to replace. On a 40HC Carrier ThinLINE, a rebuilt scroll compressor with reefer-grade refrigerant recharge is one of the largest single line items in reefer service, and on a Thermo King Magnum the cost climbs higher still because of the larger displacement and parts availability. That means a reefer with a failing compressor can cost far more to put right than the gap between it and a working one, and you are sometimes better off paying up front for a unit that has just passed a fresh PTI.

What Is a PTI and Which One Should You Ask For?

PTI stands for Pre-Trip Inspection. Every refrigerated container leaving a reputable yard runs one before delivery. The standard breaks down into three depths.

For a pre-purchase decision on a used Ontario reefer, ask for the Full PTI. The Auto Long covers most operational reality but the Full PTI is the only one that exercises the high-pressure switch and forces the refrigerator through the full temperature band a buyer will actually demand of it. Most Ontario suppliers can run a Full PTI overnight while you sleep, so the time cost is yours to walk away from the yard and come back next morning.

What a passing PTI looks like on paper: each subsystem returns a value within tolerance, the defrost cycle initiates and terminates on schedule, no alarms are logged during the run, and the set-point hold variance is within 0.5 degrees Celsius across a one-hour steady-state segment. A failing PTI shows an alarm code at the failure point and aborts the rest of the test sequence automatically.

How Good Is Reefer Insulation and What R-Value Does It Give?

The shell is what makes a reefer a reefer. A failed compressor can be replaced. A failed insulation core cannot, not economically. The shell is the bet you make for the next 15 years.

Standard reefer shells use a sandwich panel construction: two thin metal skins (often stainless steel inner, painted steel outer, sometimes a fiberglass inner on older builds) with a foamed-in-place polyurethane core. Core thickness runs 60 to 100 millimetres. Polyurethane gives an R-value of roughly 6 to 7 per inch of thickness, so a 75 mm wall (about 3 inches) lands near R-18 to R-21 across the wall section. Roof panels are typically thicker and reach R-25 or higher. Door areas are the weak point because the seal interrupts the continuous foam.

Newer premium units use Vacuum Insulated Panels (VIPs) layered with polyurethane. A VIP can deliver R-30 per inch or higher, which lets the wall hold a thinner section while still beating standard foam thermal performance. You will see VIP construction on recent Maersk Star Cool and high-end Carrier units. For pre-purchase inspection it does not change the test, but it tells you the unit is a younger build with better thermal economy in operation.

Old refrigerant in a reefer is its own concern. Pre-1995 units sometimes still operate on R-22, which is being phased down under the Montreal Protocol amendments. R-134a units are still serviceable but require licensed refrigerant handling. Newer NaturaLINE Carrier units use R-744 (CO2) as a natural refrigerant. Confirm what your unit runs on before you commit. An R-22 unit with a slow leak is an expensive ongoing maintenance commitment because the refrigerant itself keeps getting harder to source.

How Do You Check the T-Bar Floor and Condensate Drains?

The cargo space inside a reefer has a different floor system than a dry box. Instead of plywood, you get extruded aluminum T-bar profiles that run lengthwise. The shape of the T raises cargo off the floor and creates channels that let chilled air pass underneath the load. Without that floor design, the cargo at the bottom of a pallet stack would warm up before the cargo at the top.

Condensate drains are the smallest part of the reefer and one of the most overlooked. The evaporator coil produces condensation as it cools warm air. That water has to leave the box. Most reefers have two to four small drain ports near the front interior corners that route water through the front wall and out the underside. If those drains are blocked with dried product residue (fish bones, sticky fruit pulp, biofilm from a meat run) the water backs up and either freezes the evaporator over or rots the floor channel.

Run a thin wire down each drain. It should come out the bottom side of the unit cleanly. If you hit resistance, the drain is blocked and the unit needs a flush before purchase. This is a 30-minute job at the yard but it is a job that someone has to do.

The smell test. Walk in. Close the door behind you. Breathe. A clean reefer smells like cold metal and a faint mineral note from the aluminum. A reefer with biofilm smells faintly sweet, fishy, or sharply chemical depending on its last cargo. That smell does not always wash out. Ask Christian about the unit that came in after a fish run from 2018 that took three rounds of food-safe sanitizer over a month before it was clean enough to resell.

Can You Run a Reefer on Residential Power?

You cannot run a standard container reefer on ordinary residential power, and that is the single most common surprise for Ontario buyers. Container reefers run on 3-phase 460V power as standard. That is industrial power. Your residential 200-amp service does not have 3-phase available without a utility upgrade plus a transformer.

The power cord itself is replaceable but worth a look. The 460V cord with the 3-phase plug on the end is 25 to 50 feet long depending on build. The plug should be a 32-amp 5-pin twist-lock IEC pin-and-sleeve type in most cases. Inspect for: nicks in the jacket exposing wire, loose strain relief at the cord entry into the unit, pin discoloration or arc burn at the plug face.

The other power consideration is whether the unit supports gen-set operation. Some reefers ship with a hookup for a clip-on diesel generator (gen-set) used during over-the-road transport when shore power is not available. If you are buying for static yard installation you do not need that hookup, but if your site has rolling power outages a gen-set ready unit gives you fallback capacity.

Does the Controller Generation Matter When Buying a Reefer?

The controller is the brain. It is also the part that ages out fastest in software terms. A Carrier Transicold from 2002 still runs but its software predates modern data logging requirements. A 2018 Thermo King MP-4000 logs every minute of every cycle and exports through USB. The difference matters if your cargo needs traceability (pharma, certified organic, premium produce buyers asking for chain-of-custody temp logs).

Set-point range varies by generation and manufacturer. Modern reefers hold from -30 degrees Celsius (deep frozen for ice cream, seafood, certain pharma) to +30 degrees Celsius (chilled but warm holding for produce in winter). The chill band that most Ontario buyers care about (+2 to +8) sits comfortably inside every generation. The deep frozen band is where older units sometimes lose capacity over time as compressor efficiency declines.

Ask the seller to demonstrate a set point change during the inspection. Punch in -18, watch the unit ramp toward freezing, then punch in +4 and watch it cycle back up. The transition behaviour tells you more than any static reading. A unit that lags 20 minutes behind its set point change has a refrigerant or sensor problem the seller may not have flagged.

Should You Buy a Non-Operating Reefer for Insulated Storage?

A meaningful slice of Ontario reefer buyers do not need refrigeration. They need the insulated shell. A non-operating reefer (sometimes called an ex-reefer, NOR unit, or insulated dry container) has the refrigeration unit removed or disabled, but the polyurethane sandwich-panel walls, T-bar floor, and condensate drainage are intact. That gives you an R-18 to R-21 insulated box at roughly half the price of a working reefer.

What Ontario buyers use insulated NOR units for: wine cellar overflow at small vineyards, root cellar replacements for farms, sound-reducing workshops, climate-buffered electronics storage, beekeeping winter shelters, and quiet writing studios. We cover those builds in more detail in our guide to putting an ex-reefer shell to work. The insulation that was designed to hold +2 degrees Celsius against +30 ambient also holds +18 indoors against -15 outdoors with surprisingly little supplemental heat.

Pre-purchase inspection on a NOR is shorter than on a working reefer because the refrigeration unit comes out of the equation. You inspect shell, panel integrity, T-bar floor, drains, doors and seals, and panel skin condition. Most NOR buyers ask us to leave the wiring harness in place so the option to retrofit refrigeration later is preserved, even if they never exercise it.

What Drives the Price of a Reefer Container in Ontario?

Ontario reefer pricing in 2026 sorts into four bands by type and grade, from a non-operating shell at the bottom up to a factory-current reefer with a manufacturer warranty at the top. Rather than quote a moving number, the more durable thing to understand is what drives a reefer quote up or down, because those drivers hold regardless of the week’s steel pricing, shipping-line return cycles, and seasonal demand from cannabis and produce buyers.

The grading language matters. The same yard walk-through that grades a dry box uses the same four-tier IICL system here: One-Trip (essentially new, one ocean crossing only), Cargo Worthy (CW, recertified for international shipping), Wind and Watertight (WWT, sealed but not export-certified), and As-Is (older units sold for parts or insulated-shell-only conversion). For reefers, the PTI pass adds a fifth dimension that overlays the cosmetic grade: a CW-grade reefer with a recent passing PTI is the practical Ontario buy-it-and-use-it grade for most working applications.

Many people call us saying they found a reefer far below the market on Facebook. Two weeks later they call back saying they got scammed. Don’t fall for it: the bin that is suspiciously cheaper on Facebook is the bin where the PTI was never run. The defective compressor that follows that purchase often costs more to replace than the gap that made the listing look like a deal, which means the apparent discount becomes a loss before you have moved a single pallet of product into the unit. That math does not change.

If you are weighing the buy decision on a refrigerated container today, the safer route is walking a unit through the full check before you wire any money on a box you have seen in person. Drive to Brantford. Watch the PTI run. Read the printout. Pay only after the box has proven it can do its job for the next 15 years.

Frequently Asked Questions

Reach Van Blanc in Brantford

We have been supplying shipping containers across Ontario since 1995. Our yard is at 90 Morton Avenue East in Brantford, and we deliver right across the province with fast 1-3 day delivery and every quote carries a real lead time, not a hopeful one. If you are buying a reefer, drive in and watch the PTI run before you pay. That is the test that matters.

Van Blanc Ent. Inc., 90 Morton Ave E Unit 1B, Brantford, ON N3R 7J7, +1 888-509-6658

Christian or Paul will walk the unit with you, run the controller through a full PTI cycle, and print the result before any money changes hands. Worth the drive for unbeatable quality, family customer service with 30 years of experience.

Related Reading

• Spotting frame distortion on a high-cube
• An overview of reefers for Ontario buyers
• Insulated storage from a dead reefer
• The cold-chain temperatures a reefer holds
• Buying a used box without getting burned