Nor-Lake LogiTemp Walk-In Alarm HHA: High Humidity in the Box
HHA is the high humidity alarm for Nor-Lake LogiTemp walk-ins with KE2 Humidity Control. It says the moisture in the box has gone above its limit, while the refrigeration keeps running. Close and latch the door, keep traffic low, cover open containers and wipe up standing water.
Low: cooling continues and the alarm is mostly about product quality and condensation.
- Code
- HHA
- Maker
- Nor-Lake
- Equipment
- Walk-in coolers & freezers
- Applies to
- LogiTemp / KE2 Evap OEM (Split-Pak systems, A1 refrigerants)
What does Nor-Lake error code HHA mean?
Walk-ins fitted with KE2 Humidity Control watch the moisture in the air as well as the temperature. The humidity board reads a sensor in the box and compares it with a limit. When the reading climbs above that limit, the LogiTemp shows HHA. High humidity makes product sweat, can grow mold and can leave drips on shelves and floors. The refrigeration side keeps running, so the box can be cold and still too wet, which surprises people who judge a walk-in only by its temperature. Product that gives off moisture, such as uncovered produce or hot food put in too soon, adds to it. The alarm is a prompt to look at the door seal and traffic, the load, the accuracy of the humidity sensor and the humidity control settings and output.
Affected models and control systems
This applies to Nor-Lake LogiTemp walk-in coolers and freezers equipped with KE2 Humidity Control. Boxes without that option do not show humidity alarms.
Code numbers and their meaning can change between control generations. We match the full model and control before acting on a code.
What you may notice
- HHA on the display
- Sweating product, shelves or walls
- Drips or puddles on the floor
- Visible mold or a damp smell in the box
Possible causes
Listed in Nor-Lake's documentation
- Door seal worn or heavy traffic through the door
- Product that gives off moisture
- Humidity sensor reading wrongly
- Humidity control settings or output not matching the load
Other likely causes — what usually sits behind error code HHA on this control. A technician confirms which one it is before any part is replaced.
- Hot or steaming food placed in the box before it cooled
- Strip curtain missing, so humid air flows in whenever the door opens
- Evaporator drain partly blocked so standing water raises moisture
Safe checks before calling for service
- Close and latch the walk-in door and keep traffic low.
- Cover open containers that give off moisture.
- Look for dripping or sweating and wipe up standing water.
- If HHA stays on, note when it began and what was stored, and call us to schedule service.
How a technician diagnoses error code HHA
- Read HHA and compare the humidity reading with a reference meter.
- Inspect the door, gasket and strip curtain for air leaks.
- Check the evaporator drain for blockage.
- Review the humidity limit and control settings.
- Test the humidity output or add-on that manages moisture.
- The humidity board and its output are wired near live control voltage.
- Reference humidity readings take a calibrated meter.
- Changing the limit or control settings affects stored product and needs your box's requirements.
How error code HHA differs from similar codes
LHA is the opposite alarm for air that is too dry. HSA reports that the humidity sensor itself has failed.
Technical reference
- Document
- LogiTemp Electronic Controller System Operations Manual (171527 Rev. A), Alarms & Notifications List pp. 47-51
- Edition
- 171527 Rev. A, 2025 (Refrigerated Solutions Group)
- Models / control
- LogiTemp / KE2 Evap OEM (Split-Pak systems, A1 refrigerants)
- Section
- Alarms & Notifications List, printed pp. 48-52; Troubleshooting Tables from p. 52
- Checked
- October 2026
We use the maker's document to read the code and do not reproduce it. Always confirm the complete model and control before applying these steps.
Related Nor-Lake walk-in cooler & freezer error codes
Is HHA a refrigeration failure?
No. The cooling keeps running, and HHA only says the air is too moist.
Can the door alone cause HHA?
Yes, especially in humid weather, when each opening brings in moist air.
Will it clear after a few hours?
Often once the door is kept shut and product is covered. If not, the sensor or controls need a check.
Need help with Nor-Lake error code HHA?
A technician confirms the cause on site and gives you the price in writing before any work starts.