The following lines were added (+) and removed (-):
There are 2 different types of air conditioning refrigerant currently used in residential cooling systems. R-22, commonly referred to a Freon and R410A, a blend considered to be more environmentally friendly, sometimes called Puron.There are 2 different types of air conditioning [[refrigerant]] currently used in residential cooling systems. R-22, commonly referred to a Freon and R410A, a blend considered to be more environmentally friendly, sometimes called Puron.Failure Points / Things to Check# Thermostat # Blower Fan (indoors)# Compressor (outdoors)# Electrical Breaker# Dirty or Clogged air filter# A-Coil Froze Up or Dirty# Line Condition and TemperatureHave the compressor discharge and suction pressures checked. Normally R-22 is highside at 175-lbs and low side 75-lbs.If the suction line is too cold it could also indicate that line pressure is too low. This could be due to an air circulation problem through the a-coil as stated before referring to fan speed, or some other factor restricting air flow. Turn off the unit and allow the A-Coil to thaw completely. Make sure the tray below the A-Coil is not pooling with water. It should be able to drain out a hose. Turn off the unit and allow the A-Coil to thaw completely. Make sure the tray below the A-Coil is not pooling with water. It should be able to drain out a hose.=== Refrigerant Line Temperature Wrong ===The suction line should feel cool or mildly cold, but not overly icy cold. If the suction line is below freezing (32F) or not within the correct temperature tolerance range for the specific unit, this indicates low pressure in the line. Some technicians say that this line should feel as cold as a soda can right out of the refrigerator (or some say beer can cold).The liquid line should feel pretty warm to somewhat hot. If the line doesn't feel very warm it typically indicates low pressure within the line. This often indicates the system is low on coolant which likely indicates a leak or improper charging. If the compressor is going bad, it can also result in the line temperature being low and pressure being low.A system overcharged with coolant will destroy the compressor. A system undercharged with coolant will operate inefficiently or not cool the home at all. This all relates to the target superheat, which is a property known as superheat, in the HVAC world.The temperature and pressure of these lines during operation are impacted by the indoor and outdoor temperature. If it is not very warm outside, these lines cannot be accurately checked. Also, it is best to check the lines near the outdoor compressor.The liquid line leaving the condenser will never be lower than the outdoor temperature unless there is a restriction in the coil or the metering device is mounted in the outdoor unit.The liquid line should feel warm, approximately 100F. * Too hot - system may be undercharged (low on coolant)* Too cool - system may be overcharged (too much coolant)