mypros+
Error code reference

Perlick Refrigerator Error Code LA

Minimum temperature alarm

Perlick codesPerlick refrigerator codes

Minimum temperature alarm - cabinet temperature has dropped below the minimum alarm threshold.

First step from the service manual

Check if ambient temperature is colder than controller set point; check evaporator probe resistance; check if controller/compressor is turning off when satisfied.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

MyPros+ Max

Get the full diagnostic procedure for LA.

  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
Get the full procedure

$29/month · Cancel anytime · Or $9.95 3-day pass

What LA means on a Perlick refrigerator

The LA error code on a Perlick refrigerator indicates a minimum temperature alarm, meaning the cabinet temperature has fallen below the lower threshold set in the controller. This is a protective alert designed to flag conditions where the refrigerated compartment is running colder than the intended range, which can lead to product freezing or damage in units storing beverages, food, or temperature-sensitive goods.

The controller continuously monitors the cabinet temperature via an evaporator probe. When that reading drops below the programmed minimum alarm threshold, the LA code triggers. The most common technical culprits include an ambient environment that is colder than the controller set point, a faulty evaporator probe reporting incorrect resistance values, or a compressor and controller that are failing to cycle off properly once the set point is satisfied. Under normal operation, the controller should command the compressor to shut down when the cabinet reaches the target temperature, preventing further cooling.

Diagnosis should begin by comparing the ambient temperature of the installation environment against the controller set point. If the surrounding air is colder than the set point, the refrigerator may be overcooling simply due to heat transfer from the environment. Next, the evaporator probe resistance should be measured and compared against the expected values for that sensor. A probe reading outside its normal range can send erroneous low-temperature data to the controller. Finally, confirm that the controller is properly signaling the compressor to stop running when the cabinet temperature is satisfied, as a compressor that runs continuously will drive temperatures below the minimum threshold.

Source: manufacturer service documentation.

Common causes of LA

  1. 01

    Ambient temperature colder than controller set point

    Wiring / connection

    If the room or installation space is colder than the refrigerator's programmed set point, the cabinet can overcool through simple heat transfer even without the compressor running. Check the ambient temperature of the installation environment and compare it to the controller set point.

  2. 02

    Faulty evaporator probe

    Part replacement

    A defective evaporator temperature probe can report inaccurate resistance values to the controller, causing it to read a falsely low cabinet temperature and trigger the LA alarm. Measure the probe resistance and compare it against the specified range for the sensor.

  3. 03

    Compressor not cycling off when satisfied

    Wiring / connection

    If the compressor continues to run after the cabinet has reached its set point temperature, the cabinet will keep cooling and drop below the minimum threshold. Verify that the controller is correctly signaling the compressor to shut off once the target temperature is achieved.

  4. 04

    Controller malfunction

    Part replacement

    A faulty temperature controller may fail to process probe data correctly or may not send the proper shut-off signal to the compressor, resulting in continuous operation and overcooling. If probe resistance checks out and the compressor does not cycle off as expected, the controller itself may need to be tested or replaced.

See the test procedure for each cause

Frequently asked questions about LA

What does LA mean on a Perlick refrigerator?
LA stands for minimum temperature alarm on a Perlick refrigerator. It means the cabinet temperature has dropped below the lowest allowable threshold set in the controller. This is a protective alert to warn you that the unit is running colder than intended, which can potentially freeze stored contents. Common causes include a cold installation environment, a faulty evaporator probe, or a compressor that is not cycling off properly.
How do I fix the LA error code on my Perlick refrigerator?
Start by checking whether the ambient temperature in the room is colder than the controller set point, as this alone can cause overcooling. Next, measure the evaporator probe resistance to determine if the sensor is reading accurately. Also confirm that the compressor shuts off once the cabinet reaches its set point temperature. Depending on what you find, the fix may involve relocating the unit, replacing the evaporator probe, or servicing the controller.
Is it safe to keep using my Perlick refrigerator while the LA code is showing?
Continued use during an LA alarm carries the risk of freezing whatever is stored inside the cabinet. For units storing beverages, certain produce, or other temperature-sensitive products, this can cause damage or spoilage. It is best to investigate and resolve the cause of the alarm before relying on the unit for critical storage.
How much does it cost to repair a Perlick refrigerator showing the LA error code?
Repair costs vary widely depending on the root cause. If the issue is simply an installation environment that is too cold, no parts are needed and the fix is free. An evaporator probe replacement typically runs in the range of $30 to $80 for the part, plus labor. Controller replacement tends to be more expensive, often ranging from $100 to $300 or more for the part depending on the model, plus any diagnostic and labor fees from a technician.
Will resetting my Perlick refrigerator clear the LA error code?
A reset may clear the LA alarm temporarily, but the code will return if the underlying cause has not been corrected. If the cabinet temperature is still below the minimum threshold or the evaporator probe is still reading inaccurately, the controller will trigger the alarm again. Resetting should only be done after diagnosing and addressing the root cause to confirm the repair was successful.

Related Perlick refrigerator codes

All Perlick refrigerator codes

78,000+ service manuals · 160,000+ error codes · 55+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass