My air conditioner is not cooling
It could be any of a number of following problems
1. Low Freon or Puron. An A/C system requires a certain amount of Freon or refrigerant to cool properly. If low, it works less efficiently and does not cool well.
2. Dirty condenser coils– The condenser or outdoor unit is like the radiator in your car. If you blocked the radiator in your car the engine would overheat. The condensing coils cool the high pressure Freon vapor (hot gas) after it leaves the compressor so it can condense into a liquid (that’s why it’s called a condenser). If the condenser is full of grass, ivy, leaves or debris, air flow through the unit can become and overheating occurs. The coils must be kept clean and this is one of the purposes of an annual tune up.
3. Broken condenser fan motor. This fan should come on and remain on when the A/C system is operating. If the outdoor unit sounds like it’s operating, but no air is coming off it, turn it off as you have a serious problem. If the fan motor, motor relay, capacitor or wiring is defective, the motor will stop working. This causes a dramatic pressure increase which can damage the compressor and send your electric bills through the roof.
4. Air and moisture contamination — For the refrigerant inside the system to do its job properly, it must not be contaminated with air or moisture or the wrong type of Freon. These items are not compatible with the compressing system and they reduce the amount of cooling output. You cannot tell if the Freon system is contaminated without attaching a set of Freon gauges. The Freon is typically contaminated when the high side needle on the gauges fluctuates back and forth more than a couple of pounds. Moisture in the system can cause ice stoppages in the Freon at the indoor coil which can cause high Freon pressure and damage the compressor. The wrong type of Freon can cause oil separation and premature destruction of the compressor. Contamination is either through a leak on the suction side on the Freon lines (the large copper line) or through poor service practices.
5. Electrical problem. Fuses, wiring, circuit breaker or 24 volt control problem.
6. Is your thermostat set correctly? We get many calls each year from homeowners that set their thermostat to on under the fan control. That switch is not for air conditioning. It is for fan blower control in the home.