split ac unit checklist

1. Condenser Coil – Cleaned as required Dirty condenser coils raise refrigerant pressure higher than needed, increasing your electric bill. 2. Refrigerant Charge – Checked by superheat/subcooling method (Thermocharging) A low or high refrigerant charge can easily go unnoticed and increase operating costs up to 30%. An improper charge can cause compressor shutdown. 3. Controls & Safeties – Inspected & tested Controls and safeties that do not function properly can increase operation cost and cause other components to fail. 4. Relays & Contactors – Inspected & cleaned Worn contacts and loose wire connections can lead to motor or compressor failure. 5. Crankcase Heater – Operationally inspected Crankcase heaters that do not work can lead to a compressor failure. 6. Unit Wiring – Inspected & loose connections tightened Loose connections can lead to a motor, control, or compressor failure. 7. Temperature & Pressures – Taken & recorded
An accurate record of your equipment’s vital data can indicate potential problems, which can be eliminated. A record will be kept with the unit which may reduce emergency service time. Bad capacitors can lead to compressor and motor failure. 9. Unit Disconnect – Tested A worn or over-heated disconnect blows fuses and is dangerous.lowes central air conditioner prices 10. Lubrication – Application to motors & bearings.ac control unit for mitsubishi lancer Improperly lubricated rotating equipment will eventually fail.hvac in cars wiki 11. Belts & Pulleys – Inspected & adjusted Loose belts and worn pulleys decrease air flow, increase operating costs and shorten the compressor’s life. Belts crack and break with age.
12. Condensate Drain – Checked to assure it is open Algae and dust can plug a condensate drain which can cause extensive water damage to your furnace. 13. Air Filter – Replaced at customer’s option A restricted air filter can cause your air conditioning unit to waste energy and shorten the compressor’s life. 14. Voltage & Amp – Draw of the blower motor, compressor & condenser fan motors checked & recorded Improper voltage and amp draw increase operating costs and can shorten the life of any motor. 15. Thermostat – Checked & calibrated Improperly calibrated thermostats cause the unit to run longer than necessary. Every degree your air conditioner operates below 78 degrees can add 5%-8% to the cost of cooling. 16. Motors – Cleaned & inspected Dirty motors are less efficient and will fail sooner."HVAC: Heating, Ventilation, Air Conditioning" Unlike "Murphy's Law" which nearly everyone knows that states "if a thing can go wrong, it will... and at the worst possible time" many people choose to ignore "The Law Of Moving Parts" that states "that moving parts someday will wear out and like Murphy's law, will wear out at the worst possible time, leaving you in the heat without cold.
40 Point Spring Tune-Up/Check-Up The following Special Discount for our 40 point "check-up/tune-up" for cooling systems has a strict time limit. The effective dates are 2/15 - 5/15. The complete description of the 40 point check-up/tune-up for a cooling system and the benefits that accrue are: Improperly calibrated thermostat affects comfort and operating costs. Verify unit is operational before tune-up takes place. Check return air filter Restricted filter causes unit to waste energy and shorten compressor life. Routine cleaning of evaporator coil** Dirty evaporator coil decreases efficiency and can lead to compressor failure. A plugged condensate drain can cause expensive water damage. Check condensate pan and fittings for leaks A cracked pan or loose fittings can cause expensive water damage. Dirty blowers reduce air flow; increases operating costs and can lead to compressor failure. Check blower motor stability Dirty motors are less efficient and will fail sooner.
Check blower motor amp draw Lube motors & bearings Check belt, pulleys and alignment Avoids costly service calls, saves money on utility costs. Check total electrical consumption Examine parts for visible wear Avoids costly service calls. Check and secure all panels New systems have a blower door safety and will not operate if door is not properly in place. Examine all electrical connections Extends life of system; Check unit disconnect switch Worn, overheated disconnect blows fuses; Check temperature difference across coil Temperature difference indicates production and capacity of unit. Also affects comfort level. Remove debris around outside unitPrevents damage to equipment. Routine cleaning of condenser coil Dirty condenser coils raises refrigerant pressures increasing electrical costs. Check condenser fan motor stability Prevents costly service calls. Check condenser fan motor amp draw
Check condenser fan blades for vibration Prevents damage to unit and costly service calls. Improperly operating reversing valve wastes energy. Crankcase heaters that do not work lead to compressor failure. Check relays & contactors Worn contactors and loose connections can lead to motor and compressor failure. Bad capacitors lead to compressor and motor failure. Check all safety devices Keeps unit in safe operating condition. Prevents unit from starting under load when power has been temporary interrupted. A defrost timer that does not work correctly causes loss of heat and can shorten life of compressor. Extends the life, saves money, prevents failure. Test refrigeration metering device Blockage or improper operations of metering device reduces cooling capacity, increases fuel costs, shortens system life. Measure operating pressures with gauges Improper refrigerant charge can cause compressor shut down. Check noise and vibration levels
Increases comfort & extends life of equipment. Check compressor amp draw Make final operations test To ensure optimum performance. For weather protection and extended life. Proper water flow is very important to the operation of the unit. Water temperatures are very important to the operation of the unit. For Homeowner's information and records. Explanation of tune-up results Explanation of work performed in tune-up and results. Advise improvements as needed To allow you to gauge effectiveness, efficiency and potential need for repair or replacement. Answer questions, collect for work performed, signature(s) on invoice, leave customer copy of tune-up, make appointment for any additional work required. * Heat Pump Only ** If feasible and where accessible *** Water Source Only The regular cost for the cooling "tune-up/check-up" is ................... $180.00 Less 40% Spring discount if ordered before 3/30