Refrigeration FAQ

Most freezers will not allow the lights or fans to come on until the unit reaches temperature. Simply wait for the temperature in the box to come down and the lights and fans should follow. This is normal and nothing to worry about.

Some manufacturers have a door switch which operates in conjunction with the evaporator fans. If and when the door is opened, the fans automatically shut off. Sometimes, one of these switches gets inadvertently moved out of position and this will cause the fans to be inoperable. Simply check the fan switch and its function to determine if this is the cause of the problem or not.

In particular, the Master Bilt Freezer has a built-in delay from the factory. Though the factory says this is a 2-minute delay, some units may take 5 to even 10 minutes before the compressor starts.

CAUTION: Another common problem involves the power to the unit. Most units require 115 volts to power the lights and fans. If for some reason, one of the “hot” wires from the 230 power is defective or not functioning, the unit will still be receiving 110 volts, which is enough to power the lights and fans. Simply checking the power source, plug, outlet, cord, etc. may reveal the problem. We recommend consulting a licensed electrician as working with this high of voltage can be dangerous.

This question does not have an exact answer. Like a car needing an oil change every so often (depending on how much it’s driven, etc.), your freezer should be maintained as often as necessary. We typically tell customers this should be done once a quarter or “as frequently as needed” dependent upon its placement and surroundings.

A high traffic dirty area will require more frequent cleanings than a low traffic clean area. We recommend the condensing unit to be checked at least once every three months. Most manufacturers recommend the condenser be cleaned once a month.

Once it is determined how often it should be cleaned (on a check and see basis), this should become habitual. Often times, customers will say they’re “too busy” to even think about cleaning their units. In this case, we recommend they sign up with a preventive maintenance agreement (PMS).

We recommend using a soft bristle brush and a shop vac – this is the best way to get a good thorough cleaning. NOTE: Care must be taken to avoid damaging the fins on the condensing unit during the cleaning process. Also, be very careful to shut the unit off during this process. If the unit is left running, the vacuum or user could potentially get caught and severely hurt.

All makes and models come with serial numbers from the factory. This number is located inside the cabinet typically on the upper left-hand side. SEE: Data Plate

If you contact the manufacturer, they will most likely be able to tell you the original build date and in some cases, tell you the original destination of the freezer. Some manufacturers have codes that can tell the manufactured date. (Master Bilt Freezers have this code)

It depends. We’ve seen 20 year-old units still functioning like new and 3 month-old units turn to junk.

What is important to note here is that proper and regular maintenance should increase the life, longevity, and efficiency of your unit.

Freezers today are much more efficient than they used to be. Most commercial-grade freezers in use today are 230/208 powered. These units are far more efficient than the older 110-volt units just by the power source itself. Furthermore, since 2007, new units have become more and more efficient every year. High demands for energy and cost savings have manufacturers working hard to create the most energy-efficient units.

Newer generation refrigeration equipment will continue to improve and meet higher standards. These savings are apparent with the compressors too. Some manufacturers are switching to the “tin can” hermetic compressors over the semi-hermetic compressors to meet the higher demands of efficiency.

Remember, proper maintenance will always help your unit run more efficiently!

All critical information about a particular unit, including the type of refrigerant it utilizes, can be found on the Data Plate.

Most of the commercial-grade freezers we sell require 230/208/110/1 power. So what does that mean? We’ll break it down for you:

The 230/208 is the voltage requirement. The 110 also indicates a voltage requirement. The compressor requires 208 volts (a derivative of 230 volts), this unit also requires 110 volts (one leg of the power source at the plug) that powers typically the lights and evaporator fans. The 1 indicates single-phase power – if this number is a 3 – the unit will require 3 phase power.

See: Freezing Wiring/Electrical Requirements for more details on electrical requirements of commercial freezers.

Thank you for your great service. We struggled with our freezer not working correctly until you came and figured out we had a couple of issues that needed corrected with the unit. The unit is working fine now. Thank you.
Emil JensenFirst United Methodist ChurchGrand Rapids, MI

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