Updated I think you already know what the problem is:If the car has been driven and been parked under shade, the A/C blows cold air since the start. After being driven for 2-3 minutes, it blows cold air like a monster…Since, your dad have filled it with refrigerant, and did not work, hence the problem is not that. A probable fault here would be that your condenser is leaking out some of your refrigerants, thus the pressure in it is not high enough to maintain its temperature. So check for leaks in the condenser. As it may have taken some damages due to some debris from the road.Also your cabin might just too hot to cool down, thus it will take time to cool the air inside. Since its summer right?If it is really inevitable that you would park under hot areas, it would help to let down your windows a bit when you are on park, so to let air (warm) circulate in and out. Just make sure you don’t have car thieves around.You also have made mention of a street, SW 40th Street. Perhaps the that street is just too warm that your car tends to absorb the heat from outside, since your air conditioning unit sucks in air, via fan in the condenser to cool down the high pressured air from your compressor, thus warm ambiance reduces the condenser’s cooling effect.

Sources:AC Condenser Replacement Service & Cost - YourMechanicHow car air con works Car air conditioning Vehicle diagnostics Mobile vehicle Air Conditioning ServicesWritten Refrigerant is one part of a refrigerant cycle. The others are compression, expansion, and radiation. The refrigerant is compressed by a belt driven compressor. It becomes a liquid. Heat is drawn off of it. It’s expanded (throttled) and allowed to turn back into a gas. The chilled gas is run by a heat exchanger somewhere in your dash air system. The warmed refrigerant is cycled back, re-compressed, extra heat is radiated off, end the cycle continues.When you start the AC, you’re not just cooling air. You’re also chilling the metal or other materials of the coolant and heat exchanger, which has more thermal mass than the gas or the air going through on opposite sides of the exchanger. In some cars, this will seem more or less instantaneous when you turn on the AC. In other cases, it can take a while.Mechanically speaking, you have topped off the refrigerant, presumably to the correct amount (you can have too much refrigerant as well as too little, so the person doing the top-off should be using a proper set of gauges to make sure there’s the correct amount) The compressor needs to have mechanical drive, so if the belt for the compressor is worn

, or loose, this will slow the process. There is usually a clutch in the compressor, so that the pulley on the AC compressor will spin free when you’re not running the AC, reducing engine load. window ac units what sizeIf the clutch is in the process of failing, you may not be getting full (or any) mechanical coupling of the belt drive to the compressor axis for a bit - some clutches may be a bit slippery until some part warms up a bit and the surfaces catch better.ac pro unitIf you have a leak, it’d show in keeping needing to add refrigerant. how to determine what size central ac unit you needThere could also be some sort of blockage / kink in a line that keeps the refrigerant from circulating properly. Depending on the design of the heat exchanger in the dash, it might have common heat-exchanger real estate with the heater, which will normally divert hot coolant through a heat exchanger for when you want warmer air.

If there is any issue with if/whether the heater may be all the way off, it may be that the AC is needing some time to chill off the thermal mass of the coolant there.Written Please check the following.Are you keeping your fresh air vent open? This overloads your AC compressor as it needs to deal with hot outside air. Ensure you are keeping re-circulation option ON.Also keep your cooling to 100% position.Another or additional issue;You are in a cold place( I am having 115 F temp outside afternoon). Your car is designed for less priority for AC compressor and primacy is given for Car’s mobility. So it does not give power to compressor when Car’s Drive is asking for it. Is it that the particular street is slopping up or in the beginning of your trip?If no issues of above nature please check for malfunctioning of your AC controls where some inadvertent delay signal is effective.Written I don’t know how applicable this is, but Japanese cars have always had a poor reputation for misting up and sub standard air con.

Also you drive on a different side of the road to Japan (and UK), so it may be that the change of swapping things over may have affected the quality. I know we (UK) suffer (sometimes) with imported cars, where the air con unit has been stuck in a convoluted position and this effects efficiency.Written In case the AC of your car is not functioning properly, then you have all the reasons to take it to a car service professional. The professional will perform a thorough AC check up. This may include checking the compressor if it is building up the right pressure. Also, the outside air flap needs to be checked that works to restrict the warm air from outside to enter. Another probable cause can be the heater coolant valve that ought to be rightly placed for proper cooling.Also, the car technicians inspect the radiator fan to identify the issue. And of course, the refrigerant level has to be checked as that can make a huge difference to the overall performance of the air conditioner in the car.

For more information click here. 2 posts, read 7,362 times 10,654 posts, read 8,942,132 times Originally Posted by macdaddy54 If the temperature in the house was about 80 degrees, I think that you are within the envelope to have 64 degrees at the register. If it were my house, I would check all of the ductwork for leaks. SPEAKING OF, what do you guys think about Reflectix insulation for A/C ducts? Did it used to work "properly"? I've read this isn't a good idea, at least don't close more than 1/4 of the registers. Could freeze the coil. (As written, "unused rooms" could be 9 out of 10 rooms.)It should not take 2 hours of non-stop running to cool your house 4 degrees. It's possible your unit is low on freon. It's also possible that it's dirty. So you should probably call your local HVAC buddy. Be prepared to spend about $150-$200 for a good tune-up. Now let's move to something more simple: Check your furnace filter. I don't want to assume anything, but it's absolutely amazing how quickly those things can become really dirty, and restrict air flow.