Heatcraft Walk-In Refrigeration (Bohn, Larkin, Chandler, Climate Control)
Walk-in coolers and freezers
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Updated October 14, 2026
Quick answer
Heatcraft Refrigeration Products, a business segment of Lennox International based in Stone Mountain, Georgia, is behind several of the most common walk-in refrigeration names: Bohn, Larkin, Chandler and Climate Control. It also makes the intelliGen controller and sells InterLink replacement parts. If your walk-in evaporator says Bohn or Larkin, Heatcraft parts and procedures apply.
Heatcraft brands at a glance
| Name | What it is |
|---|---|
| Bohn | Unit coolers (including low-profile models with air, electric or hot-gas defrost), condensing units |
| Larkin | Unit coolers and condensing units |
| Chandler | Refrigeration equipment line |
| Climate Control | Refrigeration equipment line |
| intelliGen | Electronic refrigeration controller |
| InterLink | Certified replacement parts, accessories and electronic controls for Heatcraft equipment (introduced 2006) |
Heatcraft lists its headquarters in Stone Mountain, Georgia, with manufacturing in Tifton, Georgia, and describes itself as a business segment of Lennox International.
Controllers and codes
Heatcraft systems may use the Beacon II or intelliGen platforms, which display alarm and fault codes. Heatcraft publishes training on common errors, such as its field video on E6 and E16 errors. Before calling, write down the code; then see our Heatcraft Beacon II code page in the error code library.
Common Heatcraft service calls
- Bohn or Larkin evaporator fan motors failing; EC replacements available.
- Defrost heater and termination faults on low-temperature unit coolers. See evaporator coil iced up.
- Condensing unit compressor and contactor failures. See condensing units.
- Controller probe and communication faults on electronic systems.
- Coil leaks at return bends on older evaporators.
Parts
InterLink is Heatcraft's own parts line for its brands, and Heatcraft parts are stocked widely by refrigeration supply houses, which makes most repairs fast. Give your technician the model and serial from the unit cooler and condensing unit plates.
New Heatcraft systems and refrigerants
New systems must meet EPA refrigerant limits for new installations; from 27 July 2026 most new walk-in remote condensing units are limited to under 1,400 GWP. Existing Heatcraft systems on R-404A can still be repaired. See R-404A retrofit or replace.
Low-profile unit coolers and defrost types
| Defrost type on Bohn low-profile coolers | Used on | What fails |
|---|---|---|
| Air (off-cycle) | Coolers | Fans or timing; coil ices if fans stop |
| Electric | Freezers | Heaters, termination controls, drain heaters |
| Hot gas | Larger systems | Valves and controls |
Heatcraft notes that Bohn low-profile unit coolers come in air, electric and hot-gas defrost versions. Knowing which one you have tells your technician where to look when the coil ices. See defrost explained.
Matching a replacement Heatcraft unit
When a Bohn or Larkin unit cooler or condensing unit must be replaced, the replacement is chosen by capacity at your box temperature, defrost type, refrigerant, expansion valve, voltage, and physical fit. Heatcraft's product lines make like-for-like replacement straightforward in most cases, and InterLink parts cover common components in between.
Owner checks before calling
- Write down any controller code and whether it is flashing.
- Check each evaporator fan is running.
- Look for ice on the coil and water under the unit cooler.
- Check the condensing unit is running and its coil face is clean.
- Check the box door closes and seals.
Heatcraft equipment in the Bay Area
Bohn and Larkin unit coolers are among the most common evaporators we find in Bay Area restaurants, grocery stores and hotels, often paired with box brands such as Amerikooler, Kolpak or Norlake, or installed as replacements on older boxes. Local supply houses stock Heatcraft and InterLink parts, so fan motors, heaters, termination controls and contactors are usually available the same or next day. Coil replacements and complete condensing units may take longer, especially for less common capacities or when a refrigerant change is involved.
Inland rooftop condensing units in San Jose, Santa Clara and the Tri-Valley see high summer condensing temperatures; coastal sites in San Francisco and along the Bay see faster coil corrosion. Both conditions favor regular coil cleaning and, at replacement time, a conversation about coated coils or variable-speed condenser fans.
Owner records
Keep photos of each Heatcraft data plate and a log of controller codes seen; they make the next repair faster.
When to call a technician
Call with the unit cooler model, condensing unit model and any controller code if your Heatcraft system is warming, icing or alarming.
Open 7 days, 8 AM to 5 PM, with emergency service until 9 PM. CA Lic. #776244.
Frequently asked questions
Is Bohn the same as Heatcraft?
Bohn is one of Heatcraft Refrigeration Products' brands.
Who owns Heatcraft?
Heatcraft describes itself as a business segment of Lennox International.
What is InterLink?
Heatcraft's replacement parts, accessories and controls line for its brands.
What does Heatcraft error E6 mean?
Heatcraft has published troubleshooting guidance on E6 and E16 errors; see our Beacon II code page and have a technician confirm.
Can I still repair my R-404A Bohn system?
Yes. EPA limits apply to new installations.
Where is the model number on a Bohn unit cooler?
On a data plate on the unit cooler housing.
What is intelliGen?
Heatcraft's electronic refrigeration controller platform.
Are Bohn parts easy to get locally?
Yes. Heatcraft and InterLink parts are stocked by Bay Area refrigeration supply houses.
Can a Larkin unit cooler be replaced with a Bohn one?
Often yes, if capacity, defrost type, refrigerant, valve, voltage and mounting match.
What is Climate Control in Heatcraft's lineup?
One of Heatcraft Refrigeration Products' brands of refrigeration equipment.
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