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Troubleshooting Thermostat Issues in Commercial Chiller

By December 5, 2024No Comments
Troubleshooting Thermostat Issues in Commercial Chiller

Troubleshooting Digital Controller Issues in Commercial Chiller

 

The thermostat in a commercial refrigerator or display chiller is an essential component that ensures the compressor operates within a set temperature range. It helps maintain the desired cooling environment, ensuring stored items remain fresh and safe. However, if the thermostat suddenly malfunctions, how should you handle it? Below are some guidelines to address the issue effectively.

1. Snap-action Thermostat

 

This newer type of thermostat uses bimetallic strips and is primarily designed for first-level protection against overheating in mechanical systems. However, this type is rarely used in commercial refrigerators or chiller fridges. If it malfunctions, you typically don’t need to repair it for refrigeration purposes since it’s not suitable for such applications.

2. Liquid-filled Expansion Thermostat

 

Widely used in refrigeration systems, this thermostat excels in temperature and humidity control. It works by using a liquid-filled bulb that expands or contracts to activate a lever, which then controls the electrical switch.

 

Features:

    • Highly accurate in temperature regulation.
    • Stable performance for long-term use.

 

What to Do If It Fails:

If the thermostat stops working or behaves abnormally, it’s best to contact a professional technician to assess and repair or replace it. Avoid attempting repairs yourself, as incorrect handling may worsen the issue.

3. Pressure-based Thermostat

 

This thermostat type is commonly found in commercial refrigerators and chiller freezers. It includes:

 

  • A temperature sensor.
  • A control mechanism with elastic components.
  • A microswitch for rapid response.

 

The pressure-based design ensures precise and automatic temperature control, making it ideal for refrigeration units.

 

Troubleshooting:

If you notice temperature irregularities or control failures, replace the thermostat immediately. A malfunctioning thermostat can lead to inefficient cooling, spoilage of stored goods, and higher energy consumption.

4. Digital Controller

 

This advanced thermostat uses resistive temperature sensors for precise measurements. While popular in air conditioners, it’s not commonly found in commercial refrigerators. If your commercial refrigerator or open chiller encounters a thermostat issue, ensure you don’t confuse it with an electronic thermostat as it’s unlikely the cause.

Key Takeaways

 

Different thermostat types come with unique mechanisms and applications. Knowing which thermostat your commercial refrigerator or display freezer uses is critical for troubleshooting:

 

  • Contact a technician for liquid-filled or pressure-based thermostats if they malfunction.
  • Avoid attempting DIY repairs without the proper knowledge to prevent further damage.

 

If you have further questions or need professional assistance, feel free to contact us. We’re always ready to help you keep your refrigeration systems running efficiently!

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