Oct. 28, 2024
If you want to learn more, please visit our website.
If the air conditioning is set to max cool and fans on high, but is only blowing moderately cool air:
Check to see that the cooling fans on the condenser or radiator are running when the air &#;conditioning is on.
Look for any restrictions like leaves, bugs or dirt that would keep air from passing over the condenser.
Check the cabin air filter to ensure that it is not clogged.
Beyond this, the next step is to always check the pressures in the system using a manifold gauge set. The recommended high-side and low-side pressures can be found in your vehicle&#;s repair manual, or online. Once you have your gauges hooked up, move on to observing the AC compressor itself.
Related: Car AC Blowing Hot Air? Here&#;s How to Fix It
When diagnosing an air conditioning issue, it&#;s easiest to begin at the compressor:
With the engine running turn the A/C on max cool, set fans high, and make sure that the clutch is engaging on the compressor. Note: this is not the pulley, but the center piece that engages the pulley to the compressor shaft. If the clutch is engaging and disengaging once every few seconds, this is a sign of low refrigerant. You will also see the low-side pressure on your gauge drop rapidly when the clutch engages, hit a point of too-low pressure, then disengage and the pressure will rise. As you add more refrigerant, the gauge will hold steady, with the compressor running, and should hold at the recommended pressure.
Related: How to Replace a Car AC Compressor
Leaks are the most common problem associated with the air conditioning system. If pressure is low, then there may be a leak:
Check where the evaporator drains condensation with UV light. Sometimes oil or dye can be seen.
Note: The dye check will not work if the system is too low and the compressor is not cycling.
The AC compressor is a rotating pump that circulates refrigerant (Freon) throughout the system.
Common Problems: Leaks in one or more seals or the compressor itself can occur. Particle contamination from worn parts inside the compressor are a frequent culprit. The engagement clutch, called an AC clutch, can also fail rendering the compressor inoperative.
What to Look For: If the refrigerant is low, check for visible system leaks that appear green and oily. Failing internal components caused by normal wear or low AC Oil levels caused by leaks. Failed AC clutch. Failed power supply to the AC clutch caused by a blown fuse, bad pressure control switch, dash control module or a broken circuit wire. Inspect and test before replacing!
Related: How Much Does it Cost to Replace a Car AC Compressor?
The Accumulator/Drier collects and absorbs moisture. Moisture is like poison to the internal system components and can damage the AC Compressor as well. Depending on your vehicle, you may have an accumulator or a receiver/drier.
Common Problems: Internal failure allowing desiccant material to enter the AC system. Like sugar in the gas tank, this stuff in the wrong places can cause major problems. Leaks can result in over-saturation of the desiccant material that can lead to compressor damage.
The AC orifice tube / expansion device filters and regulates the flow of refrigerant through your air conditioning system. Depending on your vehicle, you may have an orifice tube or an expansion valve.
Common Problems: Contamination is the main cause of failure. If the system pressures are too high and/or too low, the expansion device could possibly be the issue. But first, ensure the refrigerant levels are correct and the radiator/A/C Condenser fan(s) are working properly. Remember, inspect and test before replacing!
If you want to learn more, please visit our website Sino Air Conditioner.
The AC condenser looks similar to a radiator and works in conjunction with the radiator fan(s). Air flowing across the AC condenser tubes cool the hot (gaseous) refrigerant that absorbed heat from inside the vehicle. This returns the refrigerant back to a liquid state where it will once again enter the evaporator core and absorb more heat from the interior.
Common Problems: Refrigerant leaks. Contaminant particles from the AC Compressor or AC Accumulator/Drier restricting the flow of refrigerant can lead to poor cooling. While checking the AC Condenser, inspect the Radiator / AC cooling fan motor(s).
The AC evaporator acts like a huge ice cube with holes in it. It allows the hot, cabin air to flow through the core, rapidly cools this air, and blows it out into the cabin again. The cool air felt from the dash vents is provided by the AC heater blower motor assembly.
Common Problems: The number one cause of failure is a leak due to age and wear. An electronic leak detector is the best way to check for leaks. Give attention to the AC evaporator box water drain tube. Use the tester to search for a leak. A green and oily substance may appear in the drain tube if larger leaks are present.
Related: How Much Does it Cost to Replace Your Car&#;s Air Conditioner?
As we approach the hot summer months, driving in a car that doesn&#;t have working air conditioning (AC) can be miserable. If your car&#;s AC isn&#;t running cold air, these could be the possible problems. It can get really hot outside &#; so just imagine how hot your car can get. Unfortunately, sometimes we can experience issues with how our car&#;s AC is running. If your car isn&#;t blowing cold air, read on to learn why you could be experiencing this and what you need to do.
In modern cars, it is reasonable to expect an air conditioning system to be dependable for 100,000 miles or more. However, sometimes problems happen. Nothing can ruin your day quite like realizing you don&#;t have working AC in your car on a hot summer day. The most common causes of broken air conditioning leaks or compression issues. If you are feeling cool &#; but not cold &#; air, the issue could be a clogged filter, a problem with the cooling fan, signs of radiator trouble, or it could simply mean it&#;s time to recharge your AC. If you&#;re not sure what&#;s causing your problem, here&#;s a diagnosing guide from AutoZone:
If the air conditioning is set to the max cool setting but is only blowing slightly cool air, you should:
Check to see that the cooling fans on the condenser or radiator are running when the air conditioning is on.
Look for any restrictions like leaves, bugs, or dirt that could be preventing air from passing over the condenser.
Check the cabin air filter to make sure it&#;s not clogged.
When trying to get the source of your AC issue, it&#;s best to begin at the compressor. To do this, follow these steps:
With the engine running, turn the AC on max cool. Set your fans to high, and make sure that the clutch is engaging on the compressor.
If the clutch is not engaging and the system has refrigerant, use a voltmeter to check for voltage getting to the compressor. The clutch may be bad if there is voltage. If there is no voltage, a cycling switch may be bad, a fuse could be blown, or the system may not have enough refrigerant pressure to trip the low pressure cutoff switch that cycles the compressor.
One of the most common reasons air conditioning systems experience problems is due to a leak. If air pressure is low, it could signal a leak. To check for a leak, AutoZone recommends following these steps:
The easiest way to detect a leak is by using a UV AC leak detection kit.
If you don&#;t have a kit, check around all fittings to make sure they are all secure.
Check hose manifolds on the compressor.
Look at the front seal and the o-rings sealing the pressure switches on the back of the compressors.
Check where the hoses are crimped onto the fittings.
Look at the Schrader Valves.
Check for pin holes in the condenser.
Look where the evaporator drains condensation with UV light. Sometimes oil or dye can be seen.
The warm summer months are just around the corner and it can get smokin&#; hot out &#; but your car shouldn&#;t be while you&#;re driving it. If you think your car&#;s AC isn&#;t functioning properly, stop by and see us. We want to make sure you ride comfortably this summer. With five convenient Scott&#;s Auto locations around Colorado &#; we have a team of the best professionals at every location fully equipped to help you stay cool in the warm summer months.
If you want to learn more, please visit our website Truck Air Conditioner.
If you are interested in sending in a Guest Blogger Submission,welcome to write for us!
All Comments ( 0 )