21 Point Residential Air Conditioning Inspection Checklist

Above and Beyond Industry Standard

Our 21 Point Air Conditioning inspection goes beyond the industry standard inspection. Our technicians are thorough and will give you a comprehensive report of our 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.

Air conditioner troubles rarely announce their imminent arrival. The unit that worked perfectly last fall may just be waiting until the weather turns hot to let its problems be known. That’s why a yearly residential air conditioning inspection makes sense even when you have no reason to suspect that your unit could require some assistance.

The best time to do this is in the spring. That will ensure that when summer weather rolls around, your ac unit is ready to jump into action with no need to undergo air conditioning repair.

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. They can also suffer greatly if overgrown bushes block their ability to move the air.

- Problems with Your Unit's Condensate Drain Line

As the name implies, your air conditioning unit’s condensate drain lines exist for the purpose of drawing away collected condensed water. Neglect can allow mold and algae to grow in this area, resulting in blockage that can force that water back into the drain pan causing an overflow condition. The same thing can happen in units that have fallen out of level. On top of the possibility of damaging your floors and walls, the excess moisture could also present a safety hazard to your home’s residents.

- Air Filter Issues

Your air conditioner’s air filter prevents dust, pollen and other particulate matter from circulating about and degrading the quality of your indoor air space. Because this sort of blockage impedes your unit’s ability to keep the air moving, it can place a strain on your motor, increase your energy costs and cause health problems for residents suffering from any sort of respiratory ailment. If you keep pets or live in an especially dusty environment, this situation will arise all the more rapidly.

- Air distribution registers

While seeming like common knowledge, this happens far more than one would think. When cooled air returns to your home, it needs a way to get back in. Unnoticed blockage in the form of rugs, curtains or furniture can literally stand in its way.

- Poorly sealed ducts

Leaky conduits resulting from neglect or improper installation will always wreak havoc with the airflow. Make sure your ducts are sealed to ensure maximum airflow.

- Incorrect refrigerant charge

If coolant fails to be up to factory standards it will prevent your unit from operating as it should. While low levels are the natural result of an undetected leak, an unprofessional inspector may also cause damage by adding refrigerant to a unit that does not require it.

- Worn-out fan or compressor controls

Oversized units that cycle too frequently will wear out these components. However, terminal and wire corrosion can also carry the blame, and these are two areas often in need of inspection by a qualified technician.

- Problems with the thermostat sensor

This common source of trouble with room air conditioners can cause them to ceaselessly turn their compressors on and off.

The 21 points for residential air conditioning


These 21 points will ensure that your Air Conditioning unit is ready to service, repair or operational for the Spring and Summer seasons!

  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