Check and Clean Condenser Coil & air filters

Foreign material on the condenser coil & air filters of the air conditioner reduces the system's capacity to remove heat from the house so your air conditioning system must run longer, increasing energy consumption and reducung the mechanical life of the air conditioning unit.

Check voltage andrunning  amperage on motors

Improper voltage an amperage can reduce significantly the life of the compressor, evaporator and the condenser motor, Increased current is a good indication of an iminent breakdown.

Check and adjust blower components

Proper adjustment, cleanliness of blower and components are necessary for adequate air flow to assure proper capacity and equipment reliability.

Check condensate drain (clean if necessary)

A clogged drain can create considerable water damage to the air conditioner, an increase in the corrosion factor, as well as affect indoor humidity levels.

Check operating pressures for proper refrigerant charge

Improper refrigerant charges either too much or too little could damage the compressor and could cause high electric bills through a inefficient system.
bullet    Check air filters

A dirty filter can substantially reduce the air flow over the evaporator coil, resulting in inadequate cooling of your home.  A Dirty filter could cause high energy usage and compressor damage due to liquid flood back.

Check thermostat calibration

An improperly calibrated thermostat will call for more or less cooling than desired.  The former will cost more money, the latter will cost you comfort.

Lubricate all moving parts where necessary

Poor lubrication causes drag in the motor and drive shaft, thereby requiring more electricity to overcome resistance.  The lack of lubrication can ruin bearings and burn out a motor.

Check all electrical connections

Resistance caused by loose connections will create excessive heat at the point, causing damage to the unit.  Loose connections cause improper voltage to various components, making them either inoperative or causing eventual failure.
bullet    Check run and starting capacitors.

Important!

It is best that the work outlined above, especially concerning the elecrtrical and refrigeration components be attended to by your local air conditioning contractor.