How To Buy a Commercial Used Refrigerator
This part of the free report covers a commercial used refrigerator evaluation strategy. How to avoid mistakes in buying a used refrigerator. This free report is an excerpt from the supplemental materials that come with the eBook The System For Saving On Refrigeration Repairs Cost courtesy of
A Step-by-step Strategy
This is a strategy for evaluating a commercial used cooler. The basic strategy is to avoid coolers that have a preexisting problem. Remember that there is no way to judge the internal condition of the compressor, but there are some indicators.
You may get a great price on a second hand unit. After a couple of repairs, the overall price may be too high. At that point you have a lot of money in something that will cost you a lot more money. This strategy can help you avoid that. If you find anything wrong with the unit, move on to another.
The cabinet check, evaporator check, condenser check are the same as for evaluating a used cooler.
Start by checking out the cabinet. If it looks good, check out the following thing. If it looks old and worn out, find another unit.
Does the door close securely and tightly? Make sure the lights turn off when the doors are closed. Check the gaskets for splitting, pulling loose drying out. Check for cracks in the walls and doors inside the unit, even repaired ones.
All of these things can lead to excessive running time, evaporator icing and eventual compressor failure. Then you will have to pay for a compressor change and to fix the original problem.
The evaporator is the box with a fan, inside the unit. All the parts should be securely fastened and not bent. Pour some water in the drain pan attached below the evaporator to check drainage.
All the fans should be running. A few units might have a door switch that cuts them off. If so, hold it in to make them run. The fans should not make any metallic noise. The blades should be symmetrical and free of nicks.
Look at the aluminum evaporator fins. You may have to carefully take a panel off the evaporator housing to do this. Unplug the unit first. Check for corrosion and deterioration. The fins are sharp. Be careful.
A bad evaporator can cause compressor failure. An evaporator replacement cost almost as much as a compressor change.
The condenser is the part with the compressor and fan on the outside of the unit. On full size units, it is on top or under the units. On smaller units it will be on an end or in the back of the unit.
The compressor is the big black thing with a big and little tube coming out of it. Rarely there may be 2 tubes at the base. With the unit unplugged put your hand on the compressor and try to rock it slightly. If you can’t, the shipping bolts were never loosened and the compressor is probably damaged internally.
The problem with checking the condenser coils is that it may have just been cleaned. A unit that has constantly run with a dirty condenser has a damaged compressor. Look at the fan blade and cowl around the fan. If they are dirty, the compressor has had a hard life.
Check to see if the condenser fins are greasy. Grease is a great insulator and caused the compressor to overheat and overwork.
The fan shouldn’t make a metallic noise or rattle. It should be symmetrical without any nicks. The compressor should not rattle either.
Sequence of Operations Check
If everything looks good so far, it is time to figure out if the unit is working properly.
On equipment bought at auctions, I have seen compressors straight wired so the unit looks like it is working. Unfortunately this led to compressor failure. The original problem was a bad cold control.
Use the following simple procedure to check out the used refrigerators operation. The sequence of operations for a used freezer is different.
STEP 1 Open the door to warm the box. The condenser fan and compressor should come on, close the door. The condenser fan and the compressor always run together.
STEP 2 The evaporator fan should be running as the box cools down. The evaporator fan always runs.
STEP 3 When the temperature gets low enough to satisfy the temperature control, the compressor cuts off and the condenser fan cuts off.
If everything works properly, you have ruled out many expensive potential problems. There is still no guarantee. There is no practical way to predict future compressor failures. You have greatly reduced your risk, but it cannot be eliminated. Good luck buying a used refrigerator.
Should You Buy Used Refrigeration Equipment?
I recomend that you do not buy a used refrigerator or refrigeration equipment. This is why. I will also tell you how to try to avoid making common mistakes, if you want to do it anyway. FREE REPORT PART 2A
How To Buy a Commercial Used Freezer
How to evaluate a commercial used freezer before buying it. How to avoid costly mistakes. A simple step-by-step strategy. FREE REPORT PART 2C
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