A compressor is a critical component of a walk-in cooler or any refrigeration system. It compresses the refrigerant and pushes it into the condenser coil and evaporator coil for cooling. If it doesn’t perform this job, the walk-in won’t cool properly or stop cooling at all. So, you should know the signs of compressor problems to detect them as early as possible and contact a commercial refrigerator repair expert.
Signs Of A Malfunctioning Walk-In Cooler Compressor
Inconsistent Temperatures
A compressor that’s slowly going bad won’t push the refrigerant through the coils as effectively, so the cooling won’t be optimum. You will notice inconsistent temperatures and the walk-in not staying at the ideal temperature range of 32°F to 40°F (0°C to 4°C). In fact, it should be at 35°F to 38°F most of the time. Anyways, if the temperature fluctuates beyond this range regularly, then there is a problem.
Fun fact is that almost any walk-in cooler problem can cause temperature fluctuations, so solely relying on this sign to spot a faulty compressor is not suggested. You should also couple this sign with other signs as well to know that it’s, in fact, a bad compressor.
To keep a check on the internal temperature of your walk-in, always keep a food-grade thermometer in the unit so you can compare the temperatures at regular intervals.
The Compressor Running Constantly
If you notice the compressor and the unit running constantly to keep the walk-in’s temperature in range and still failing at it, then it’s a huge sign of a problem. It doesn’t necessarily have to be a compressor problem, but it can be.
Normally, the unit cycles on (compressor turns on) for 10-20 minutes at a time and then it turns off. This can happen 2-3 times an hour. Even though this range is not strict because some factors like the usage, ambient temperature, and inventory can slightly increase or decreases it, but this is still a good way to spot problems.
As stated, a walk-in cooler that doesn’t turn off can be a compressor problem. However, it could be a sign of other issues as well, like worn door seals, dirty condenser coil, ice buildup on evaporator coils, or refrigerant leakage. Regardless, you should be alarmed if the walk-in runs continuously and contact an expert.
Walk-In Cooler Short Cycling
The total opposite of the walk-in running constantly is short cycling, where the unit turns on and off in very short periods of time. This can be a sign of a faulty compressor, more so if there’s a clicking noise too when it turns on or off.
However, any other problems can be the cause of the walk-in short cycling. Problems like thermostat issues, control board problems, refrigerant leakage, dirty condenser coils, ice buildup on evaporator coils, evaporator fan motor failure, and even an oversized unit can lead to short cycling.
If the unit doesn’t even run for a couple of minutes before shutting down and only turns on for a few seconds or keeps turning on and off rapidly, it may be likely a compressor issue, a faulty capacitor, or a wiring issue. This leads us to the next cause.
A Bad Capacitor
A capacitor is a small but important component that provides the power boost required for the compressor to turn on. Even if the compressor is fine, a bad capacitor will lead to the compressor failing to turn on, along with a clicking noise. This can also damage the compressor over time.
Therefore, if the walk-in keeps turning on and off, you should turn off the walk-in, move the inventory to another refrigerant unit, and consult commercial refrigerator services Fairfax Station.
Unusual Noises Near The Compressor
A walk-in cooler compressor makes a steady humming sound when operating. However, if it’s making noises, anything other than that, there could be an issue. If there are noises like loud buzzing, rattling, knocking, or hissing, they point to certain problems.
- Loud buzzing: Electrical issues or a motor or compressor problem.
- Knocking sounds: This is probably the most concerning because it usually means a damaged compressor.
- Rattling noises: Some parts, like mounts or panels, may be loose.
- Hissing sounds: It’s usually associated with refrigerant leakage.
To check for unusual compressor noises, you should be near the compressor or the condensing unit that houses the compressor. Commonly, the condenser unit of walk-in coolers is on the roof or in a separate room inside the facility. Some other walk-in cooler models may have the condenser unit on top of the walk-in or placed on the side.
Keep in mind that sometimes, you may be able to hear noises inside the walk-in as well. They could mean a totally different problem, like the evaporator fan failure, or the compressor noises or vibrations reaching the interior of the unit.
Overheating Compressor
An overheating compressor could mean an internal compressor problem or other issues putting stress on the compressor to work overtime. To ensure walk-in cooler safety, consult an expert if the compressor overheats. Common problems that can overheat the compressor can be:
Dirty condenser coils: Dust and debris blocking the coils and affecting heat dissipation.
Bad condenser fan motor: Even if the condenser coils are clean, they have fans to aid in heat dissipation. If the fans are not working due to obstructions or fan motor failure, the compressor will overheat.
Airflow problems: Airflow problems, such as a damaged fan, a bad fan motor, a blocked evaporator coil, overstuffing the walk-in, obstructing the exterior vents of the walk-in, and other issues can create airflow problems, which will overheat the compressor.
Worn door gasket: A cracked or worn door seal will let warm air in, so the walk-in will work for longer periods. This can put strain on many components, including the compressor.
Ice buildup on evaporator coils: Ice buildup on evaporator coils will impact the airflow and the cooling performance of the walk-in, leading to an overeating compressor.
Faulty capacitor or contactor: These components help in starting and running the compressor. Their failure will lead to compressor issues and overheating.
Oil Spots Around The Condenser Unit
Oil spots near the condenser unit mean there is a serious problem. Most commonly, they are due to refrigerant oil leakage or compressor gasket leaks.
Note that, apart from the refrigerant, oil circulation is also a part of the refrigeration process. So, in case of a refrigerant oil leakage, you see oil spots near the condenser unit.
Furthermore, if the oil spots are near the compressor housing, it’s most probably due to worn shaft seals of the compressor leaking oil. This is a huge sign of a compressor problem and you should not ignore it.
Excessive Vibration Near The Condenser Unit
The condenser unit should not be excessively vibrating. If it is, there may be a compressor issue. Other problems that can lead to noticeable vibrations can be airflow problems, refrigerant leakage, power issues, improper mounting, loose components, worn fan motor bearings, damaged condenser fans, etc. So, you should call in an expert to inspect the unit and determine the cause of this problem.
Conclusion
Walk-in cooler compressor issues can directly impact the performance of the unit and the stored inventory. So, if you notice these signs, get in touch with a walk in cooler repair Clifton professional ASAP.
