3)Suction line being at ambient temperature(not even slightly cool). With the liquid line being warmer than the ambient temperature it is rejecting heat to the air. Fan cycle control: This is normal if this type of control is based on pressure. Whats the indoor temp the outdoor temp. you should have hot air blowing out the top as the fan extracts the heat from the line. If the metering device is in the outdoor unit, you're going to want to insulate the line. This temperature change should be dramatic. the liquid line is high pressure not high heat. your supply temp and return air temp. The unit was installed 3 years ago. The problem of car AC lines freezing up is caused by moisture that has been introduced into the system. It was never started until now. I have checked everything else and was wondering what the temperature of the refrigerant lines should be. The Freon flows through the copper lines to get from indoor unit to outdoor units. Or whom should I complain the mechanic/ fitter or the company/ shop from where I … Is the filter clean you could have a airflow issue. The bare and small copper lines are known as liquid lines. Is the Suction line cold and sweaty? We use cookies to give you the best possible experience on our website. Home improvement questions? LOW ON FREON. AC seemed to be cooling the house fine, but somethings definitely not right. DIY Auto Service: Air Conditioning (AC) System Operation With TXV or Orifice Tube. At the expansion valve or fixed orifice tube, depending on the system, liquid refrigerant quickly expands into a gas, forcing the temperature to drop. LOWER PRESSURE THAN NORMAL If the copper line from my ac is warm am I leaking freon? the high side is called the liquid line and that should feel hot to the touch. Ask a … The refrigeration system is a low temperature freezer with a receiver and a TXV. Asked in Air Conditioning and Coolant , … By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. if the unit has a sightglass on the liquidline it should be clear with not a hint of bubbles. the whole point of the condenser is to take the very hot high pressure gas that comes out of the compressor and cool it down to a warm not-as-high pressure liquid as it exits the condenser. Fan is turning on air conditioner but no air movement. I have sucked the refrigerant back, and vacumed 3-4 times, but the liquid line stays cold and the suction line stays warm. Air Conditioning and Cooling Systems - AC not cold, high pressure line cool to the touch - I am having an issue with my AC where it appears that my system is just pulling in the ambient air from Who told you it was suppose to be hot? Please help me what should I do? So I checked while the ac is ON, the liquid (Smaller Diameter) line is very cold and sweating but the suction (Larger Diameter) line is neither too hot nor too cold its of normal temperature (i.e, Room Temperature). By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Is the liquid line warm not hot? Is the filter clean you could have a airflow issue. If the copper line from my ac is warm am I leaking freon? Also I found that after letting the ac On for a while touching the foam coating of the liquid line near the outdoor unit is of normal temperature but touching it from the indoor side is a bit colder.