3. Blower Wheels—Dirty blower wheels reduce airflow, causing longer operating time and increased cost. This problem can lead to lost comfort and
4. Refrigerant Charge—A low or high refrigerant charge can easily go unnoticed and increase operating costs. An improper charge can cause your
compressor to shut down.
5. Air Filter—A restricted air filter can cause your air-conditioning unit to waste energy and shorten the compressor's life.
6. Belts & Pulleys—Loose belts and worn pulleys decrease airflow, increase operating costs, and shorten the compressor's life. Belts often crack and
break with age.
7. Lubrication—Improperly lubricated rotating equipment will eventually fail.
8. Thermostat—Improperly calibrated thermostats allow the unit to run longer than necessary. Every degree your air conditioning operates below 78
degrees can add 5–8% to the cost of cooling.
9. Controls & Safeties—A defrost timer that is not working properly can cause a loss of heat and can shorten the compressor's life.
10. Motors—Dirty motors are less efficient and will fail sooner.
11. Capacitors—Bad capacitors can lead to compressor and motor failure.
12. Condensate Drain—Algae can plug a condensate drain, which can cause expensive water damage.
13. Crankcase Heater—Crankcase heaters that do not work can lead to compressor failure.
14. Relays & Contactors—Worn contacts and loose wire connections can lead to motor or compressor failure.
15. Unit Disconnect—A worn or overheated disconnect blows fuses and is dangerous.
16. Unit Wiring—Loose connections can lead to a motor or compressor failure.
17. Temperatures & Pressures—An accurate record of your equipment's vital data can indicate potential problems that can be eliminated. A record will be
kept with the unit that may reduce emergency service time.
18. Ductwork—Duct leaks may exist from the time your system was originally installed. Insulation can fall off as well. Unrepaired ductwork problems can
increase operating costs by 30% or more. Accessible ductwork will be inspected at least once during the first year of the agreement.