What can cause air contaminated refrigerant?

What can result in air contaminated refrigerant?

What can result in air-contaminated refrigerant?

Why must recycled refrigerant checked for air?

Refrigerant contaminated with air won't function properly.

What causes the air return not to pull air and unit to freeze up?

The evaporator coil is starving for refrigerant. Basically what is happening is the refrigerant pressure/temperature is low enough to cause the humidity in the air to freeze on the evaporator coil. This cause a air restriction, hence insufficient to no indoor air flow. Usual common cause is a low charge of refrigerant or a restriction in the metering device, although not the only possible causes.

Is air contaminated?

Air is frequently contaminated.

Can you overload on freon in your central air unit?

overcharging a central air unit system with refrigerant(freon) will cause the head pressure to be?

Why do you need to recharge the refrigeration system?

usually the refrigerant you have pumped out of the system is contaminated (either liquid/air) contaminated refrigerant is less efficiant and will lead to a short system life. refrigerant is works kind of like the rain in a water cycle. The system starts at the compresser (the heart of the system) pushing refrigerant in to the condenser (like condensation in the clouds) condensing to a liquid and heads toward the metering device (raining) The metering devise rapidly lowers the pressure of the system into the evaporator (get the picture already?) where the refrigerant collects the heat in the refrigerated space and boils into a vapour releasing it to out side the refrigerated space. obviously there is more detail then this but thats the basic operation.