Why Would My Air Conditioning Line Freeze Up?

Why Would My Air Conditioning Line Freeze Up?

Reasons Your Air Conditioning May Freeze Up The function of an air conditioning unit is to keep a home or business cool during the hot summer months. However, there is always the chance of air conditioning lines freezing up. When those AC lines freeze, there are a number of reasons to explain why that happened. Here is a look at those reasons. Dirty Air Filter An air conditioning unit depends on air flow across the coils in order for it to work properly. If that air becomes blocked and there is no air flow, your AC lines will freeze. The coils are actually what freezes and cause a build-up of ice. Take out your air filter, hold it up to the light and if you cannot see through it then it is too dirty and needs to be changed. Low Refrigerant In order for an air conditioning unit to function, there needs to be an adequate amount of refrigerant running through the lines. When a system becomes low on refrigerant, the freezing point becomes lower and that results in ice accumulating on the tubes. Bad Thermal Expansion Valve Another reason for frozen lines in an AC unit is due to a faulty thermal expansion valve, also known as a TXV. This controls the flow of refrigerant through your AC unit. If this malfunctions then not enough refrigerant will pass through the system and the coils. That will cause a freeze up. Some people also refer to a TXV as a metering device. Faulty Furnace or Blower Motor Frozen lines can indicate that the furnace or blower motor has quit....