True Refrigerator Troubleshooting Guide

Even the most reliable commercial equipment can experience occasional issues, and True refrigeration units are no exception. Whether it's temperature fluctuations, water leaking, or performance concerns, recognizing common problems early helps prevent downtime and costly repairs, and in most cases, according to a True Refrigeration Product Specialist who spoke with KaTom, "over 99 percent of the issues are going to be resolved on a proper installation." This guide highlights common troubleshooting techniques to assist foodservice operators in maintaining their True equipment. Whether you're facing a minor issue or you require a replacement part, KaTom offers resources, expert support, and a wide selection of True reach-in cabinets, undercounter refrigerators, prep tables, and more.

Common True Refrigeration Problems

  1. Not Cooling or Freezing
  2. Water Leaking
  3. Compressor Issues
  4. Light Not Working

Not Cooling or Freezing

"The number one priority is maintaining ideal temperatures to ensure food stays safely within the proper temperature range," True's Product Specialist said, and if your True refrigerator or freezer isn't maintaining the proper or set temperature, there could be several underlying issues. Common causes include dirty condenser coils, blocked airflow, malfunctioning thermostats, and compressor failure. Regular inspection and maintenance can resolve these problems and restore normal operation. Before calling for service, look into these troubleshooting steps:

  • Examine the condenser coils: Dust, dirt, and debris buildup can restrict airflow, reducing cooling efficiency
  • Check the thermostat setting: Ensure it hasn't been accidentally adjusted or turned off
  • Inspect door gaskets: Make sure seals are tight and free of damage to prevent cold air from leaking
  • Verify power supply: Confirm the unit is properly plugged in and the circuit breaker hasn't tripped or been reset
  • Ensure proper airflow: Avoid overloading the unit to provide space for air to circulate around stored items and the unit itself

Water Leaking Inside

Water leakage is a common issue that can usually be traced back to clogged drain lines, improper unit leveling, or damaged door gaskets. When condensation can't drain properly or warm air enters the unit, moisture can accumulate on interior surfaces and lead to pools of water. To address this issue, consider the following troubleshooting tips:

  • Inspect and clear drain lines: Use warm water or compressed air to remove any clogs blocking condensate drainage
  • Check the unit's position: Make sure your unit is properly leveled so water flows toward the drain pan
  • Examine the door gaskets: Replace cracked, torn, or loose gaskets that may be letting warm air enter the cabinet
  • Clean the interior regularly: Wipe down moisture buildup to prevent mold, odors, and additional leaks

Compressor Issues

As the core of the refrigeration unit, the compressor is responsible for circulating refrigerant and maintaining consistent internal temperatures. When a compressor malfunctions, it can lead to serious cooling problems, often signaled by loud noises, overheating, or frequent on-and-off cycles. "The compressor is the heart of the system, and if you stay on top of PM programming and keep the condensers clean, you won’t clog those arteries," True's Product Specialist said. According to commercial refrigeration expert Jim Van Vleet, "If you hear clicking or buzzing, it may indicate an issue with the compressor. These sounds are often early warning signs that the compressor could fail soon." To address potential compressor problems, try the following steps:

  • Check for unusual noises: Clicking, buzzing, or humming may indicate compressor strain or failure
  • Clean condenser coils: Dirty coils can cause the compressor to overheat or work too hard
  • Monitor cycling: Short, frequent cycles could suggest a thermostat or compressor relay issue
  • Ensure proper ventilation: Make sure the unit has adequate space around it to prevent overheating
  • Call a technician: If the compressor runs constantly or not at all, professional service may be needed to assess and replace faulty components

Light Not Working

If the interior light in your True refrigerator isn't working, the cause may be as simple as a burned-out bulb, a faulty door switch, or a loose electrical connection. These small issues can typically be resolved with a quick inspection and some basic adjustments. Look into the following steps to restore lighting inside the unit:

  • Replace the bulb: Remove the cover and install a new manufacturer-approved bulb if the original has burned out
  • Check the door switch: Press the switch manually to see if the light activates and replace it if it's unresponsive or struck
  • Inspect wiring connections: Make sure the light's wires are securely connected and not damaged or frayed
  • Verify power supply: Be sure the unit is plugged in and the power outlet and power cord are functioning

General Troubleshooting Steps

This section serves as a quick reference for simple troubleshooting tips to resolve many common True refrigeration issues. As well as checking the unit's condenser coils and door gaskets, these basic steps can help minimize downtime and save money before calling a technician:

  • Verify unit leveling: “Make sure that everything is on a dedicated electrical circuit, making sure that there are no extension cords… and making sure the cabinet is level,” True's Product Specialist said.
  • Adjust thermostat settings: Confirm the temperature control is set correctly for cooling or freezing
  • Check for airflow obstructions: Keep internal vents and fans clear of food containers or packaging
  • Reset the power supply: Unplug then plug the unit back in or check the circuit breaker if the unit isn't turning on

Model Specific Troubleshooting

Each True refrigeration model may have unique components, control systems, and error codes. Understanding these variations helps pinpoint issues quickly and accurately. Below are a few common models with associated error alerts.

  • True T-23 & T-49 (select models only):
    • E1: Signifies thermostat probe failure
    • E2: Indicates evaporator probe malfunction
    • E3: Denotes auxiliary or display probe issues
    • thi: Maximum temperature alert
    • tLo: Minimum temperature alert
    • do: Door is open or not sealing properly
  • True models with Dixell controls:
    • P1: Thermostat probe failure
    • P2: Evaporator probe malfunction
    • P3: Experiencing display probe failure
    • HA High temperature warning
    • LA: Low temperature warning
  • True GDM-26-HC, GDM-49-HC, & GDM-69-HC-LD:
    • Watch for E1, E2, E3, thi, tLo, or do error codes depending on control system
  • True TFP, TPP, TSD, TSSU, & TWT:
    • These units may display E1 through E3 errors, thi or tLo temperature alarms, or a do door alert

For a complete list of error codes, model-specific details, and troubleshooting tips, refer to your owner's manual.

True Refrigeration Preventative Maintenance Tips

Preventative maintenance is key to keeping your True refrigeration unit operating at peak performance and avoiding costly breakdowns. Staying proactive with regular upkeep will protect your investment and ensure reliability.

"Regular servicing of refrigeration units can save businesses thousands of dollars by preventing breakdowns during peak operational hours" – Jim Van Vleet

For more care tips and purchasing guidance, visit our True Refrigeration Buyers' Guide.

When to Call a Professional

If your True unit continues to run warm, leaks refrigerant, or makes loud compressor noises, it's time to contact a qualified technician. These signs may point to deeper mechanical issues that you can't fix yourself. As Van Vleet notes, "If your refrigerator isn't cooling despite all adjustments, it might be a deeper issue, like a compressor or refrigerant problem that needs professional attention."

Explore True Refrigeration, Parts, & Accessories at KaTom

As a trusted source for high-quality commercial refrigeration solutions, KaTom has industry-leading units from True. Whether you're outfitting a new kitchen or upgrading existing equipment, our selection of True products includes options for every need and layout. KaTom also offers True refrigeration parts and accessories to help maintain optimal performance and extend the life of your equipment.