21 Point Commercial Air Conditioning Inspection Checklist

Above and Beyond Industry Standard

Our 21 Point Commercial Air Conditioning inspection goes beyond the industry standard inspection. Our technicians are thorough and will give you a comprehensive report of your AC unit(s) with any recommendations on service, repair, or replacements you may need. Information is important and we make sure our clients are well informed before making any decisions about their units. But you’re probably thinking “Hey! My system works fine? Why do I need to have it inspected?” Well, we’ll tell you.

When you first installed it, you knew that it was in for the long haul. You also knew that in a region where summertime temperatures routinely rise to triple digits your unit was bound to have a pretty big job to do. Early on, it never failed to rise to the occasion, but now you’re hearing strange noises, smelling strange smells, and receiving excessive energy bills for performance that’s suddenly begun to fall far below standard.

It’s a known fact that the harder anything works, the faster it will start to wear out. With excessive dust, heat and hard work small and easily fixable problems can quickly escalate into major malfunctions where the repairs will be both costly and time-consuming. On the first day that outside temperatures soar to 110 degrees, you could find yourself forced to shut down your business entirely. This is the last thing your company wants to face. If you’ve been skipping inspections, though, don’t be surprised if it happens to you.

FAQ's: What can Go Wrong?

- Build Up Issues

As your system works to keep you comfortable, its most critical areas can accumulate large quantities of environmental dirt and debris. The buildup on air filters and condensing coils alone can cause your unit to lose 5 percent of its efficiency every year and thwart its ability to cool your home as well as it should. External condenser units in particular, tend to attract cobwebs and leaves and with Las Vegas in the desert, the dust build-up is a real factor.

- Refrigerant Level and Pressure

Older, inadequate, or leaking refrigerant is often easy to miss and could be the culprit behind all your cooling problems. During the hottest summer months, a loss of just 10 percent of this vital fluid can raise your monthly energy bills by as much as 20 percent. It also puts your entire unit under stress.

- Heat Rejection

Your air conditioning system does more than simply cool the inside air. It must also pull the hot air out! Any damage or blockage to the heat rejection part of your unit will cause it to overheat. As a result, the motor will cycle on and off with what could seem to be lightning speed while your interior temperatures lag well behind your thermostat settings.

- Indoor Heat Exchange

If anything restricts its ability to transfer heat to the refrigeration system, your commercial air conditioner will not be able to lower the temperature of your interior air. An impediment or obstruction will force it to work that much harder while failing to satisfy your cooling requirements.

- Air Delivery

Your air conditioning system’s fans play a vital role in determining how well your unit operates. In addition to shooting holes in its efficiency, any failure of these vital components will force your unit to operate for longer periods while wreaking havoc with your energy costs.

- Filters and Screens

All air delivery systems require unobstructed access to outside air. Any damage or debris that impedes its flow through screens, grills or filters will force your unit to go the extra mile in a brave but often fruitless attempt to deal with the resistance. New filter replacements based on the business you run will help keep your system in tip top condition. Check out our filters page to order yours today!

- System Controls

Current headaches with any air conditioning system often trace back to the settings, location, or capacity of its controls. While the situation is often simple and inexpensive to correct at the start, ignoring it could lead to costly damage in the end.

The 21 points for Commercial air conditioning


When Las Vegas' blazing heat threatens to turn your commercial space into an inferno, you don't want your air conditioner giving up the ghost. To keep your unit up to the challenge, call Windy City Air and schedule that vital inspection today.

  1. Ask if there are any special concerns about your cooling system
  2. Remove the electrical disconnect cover & tighten the connections
  3. Visually inspect the condenser for any type of damage
  4. Visually inspect the copper tubing for leakage or damage
  5. Check duct work for loose or leaking connections
  6. Chemically clean the condenser coil & rinse if water is available
  7. Check the circuit board & wiring for scorching or discoloration
  8. Tighten all electrical connections
  9. Check for proper voltage to the condenser
  10. Check the thermostat for proper mounting, location and setting
  11. Check, clean and replace filters if part of the contract
  12. If motor is belt driven, replace if part of the contract
  13. Check the discharge pressure of the system freon levels
  14. Check the suction pressure of the system freon levels
  15. Check the condenser fan blade for balance & clean
  16. Check the amp draw of the condenser fan motor
  17. Check the amp draw of the compressor
  18. Check the amp draw of the blower motor
  19. Check the temperature drop across the evaporator. ^T is 17 – 21 deg.F
  20. Check the temperature difference between rooms max. ^T is 5 deg.F
  21. Check super heat & sub-cooling