what causes ac not to cool when the car is not moving and smoke to.blow out vent

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Driving around on a hot day in a motorcar without a working air conditioner can be uncomfortable and fifty-fifty dangerous in extreme heat. Diagnosing the reason that your air conditioning isn't working will help yous determine whether the problem is one that you can ready yourself or if you lot need to take it to a repair shop. You lot are too less likely to be taken advantage of at a repair store if you already know why your Air-conditioning is not working.

1. 1

   Plough the air conditioning on while the car is running. The air conditioner won't run properly unless your engine is running. The best setting for diagnosis is "fresh air" (not recirculated) with the air bravado out of the center vents in the dash and the Ac turned on.

   • Outset with the fan speed turned to its highest setting.
   • If your car has a "Max AC" setting, select that option.

2. 

   ii

   Listen for unusual noises coming from the Air conditioning. Noise could betoken that there is a problem with your compressor and that it needs repair or replacing.

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3. 

   3

   Feel the air coming out of the vents. Y'all will need to know if the air is cold, room temperature, or hotter than the air around it. Also note if it starts cold only turns warmer, or if it is usually warm but blows common cold intermittently.

4. 

   4

   Notice the air pressure. Turn the air pressure level to the high and low settings and run across if the airflow changes like it normally does.

5. 

   v

   Odour the air coming from the vents. If at that place are unusual smells, y'all could have a leak. You may also need to change your motel air filter.^[1]

6. 

   6

   Inspect your automobile'southward fuses. Check your possessor's manual for the location of your car'due south fuse panel, as it may be under the hood, in the trunk, or even in the driver's foot well area. A blown fuse can cause your AC to stop working.^[ii]

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1. 

   1

   Check all of the vents. Be certain that air pressure is coming out of the vents that you have selected. Motility the vent selector to encounter if the air moves to the proper vents.

   • If changing the selected vent does not modify the flow of air, you lot likely have a blend door problem, which will require replacing the doors inside the nuance that decide the direction of the air flow.^{[3] [4]}
   • Alloy doors alter position when the temperature selection is changed, blocking the flow or permitting the flow of either hot or common cold air.
   • Sometimes an Air-conditioning organization with a mode door trouble could be working fine, but the air menses is being directed somewhere else, similar dorsum out to the engine, instead of into the auto.

2. 

   ii

   Look at your cabin air filter. Especially if the air coming from your vents smells funny or if y'all recall you lot accept had a slow decrease in pressure for some time, check the air filter. You will be able to see if it has a buildup of clay or droppings on it.

   • It is possible that your cabin air filter is and then blocked that information technology is interfering with your air force per unit area, and replacing it will exist a relatively easy an inexpensive fix to your problem.
   • Your machine manual may have instructions on replacing the cabin filter. If it doesn't, try searching online for "replace cabin air filter" followed by the year, brand, and model of your machine (for instance, yous might search for "replace cabin air filter for 2006 Toyota Camry").

3. 

   3

   Cheque for a blower motor problem. The easiest manner to exercise this is to try turning on your rut. If you lot have weak air menses when the rut is on too, your blower motor may take gone out.^[5]

   • A blower motor may accept a resistor problem if your air only blows on the high setting but volition not accident on a lower setting.
   • Unfortunately, mice and other rodents sometimes build homes in car HVAC hoses and can get defenseless in the blower motor when the motorcar is started. A loud noise (or bad scent) coming when the heat or air are running could be a sign of this problem.

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1. 

   1

   Find the front of your Air-conditioning condenser. It is commonly located in front end of your radiator. If there are leaves or other clay or buildup blocking it, remove them and clean the area.

2. 

   two

   Expect under the hood at the Ac compressor clutch. If your air pressure is normal only the air is hot, you may have a compressor trouble. Checking to run across if the compressor clutch is engaging is a unproblematic visual inspection.^{[half dozen]} The compressor is unremarkably located towards the front end of your engine, just inside the grill of your car.

   • Your auto should exist running with the AC on to check the compressor clutch.
   • The compressor looks like a small motor with a large wheel on the end. The wheel (which is the compressor clutch) should be spinning. If it is not spinning, you have a problem with your compressor.^[seven]

3. 

   3

   Bank check the tension on the chugalug of the compressor. Information technology should be tight. If it is loose, yous demand a new compressor belt.^[8]

4. 

   four

   Find whatever coolant system leaks. One of the near common AC temperature problems is low refrigerant. The AC system is airtight, and then refrigerant should not exist lost unless at that place is a leak.^[9]

   • Await for oily balance on or around hoses that attach Ac components together. Oily spots may signal a refrigerant leak.
   • Yous may consider using an electronic leak detector, which tin observe much smaller quantities of refrigerant.
   • There are also some testers that apply dye, UV light, and protective glasses to find leaks.
   • If you do observe a leak, you will probable demand to rent a professional to repair the leak. You will probably need new parts likewise, as many of the components cannot be repaired or patched.

5. 

   5

   Cheque for freezing. If your Ac blows common cold initially only so stops being cold after some utilize, it could exist freezing. Excess air and moisture in the system may lead components to freeze (literally).^[10]

   • Freezing can also be caused by an oversaturated receiver/drier or accumulator.
   • Turning the system off for a while and letting it thaw will temporarily solve the trouble.
   • If the problem is persistent, you may need your system to be flushed or evacuated with a vacuum pump.

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Add New Question

• Question

  Can a bad temp sensor cause AC not to work?

  

  Ed Beery is an Automotive Specialist and the Owner of InTechgrity Automotive Excellence based in Denver, Colorado. With more than eight years of experience, he specializes in providing maintenance and repair services for both individuals and companies. Ed and the InTechgrity Automotive Excellence Team are approved past the American Motorcar Association (AAA) for repairs and are Automotive Service Excellence (ASE) certified.

  

  Automotive Specialist

  Expert Answer

  Definitely! If the temperature sensor does not transport a indicate, then the AC will not turn on. Only keep in mind that these sensors are located deep in your HVAC system backside the dashboard, and can exist hard to inspect and supercede.

• Question

  How do you test a blend door?

  

  Ed Beery is an Automotive Specialist and the Owner of InTechgrity Automotive Excellence based in Denver, Colorado. With more than than eight years of experience, he specializes in providing maintenance and repair services for both individuals and companies. Ed and the InTechgrity Automotive Excellence Squad are approved by the American Auto Association (AAA) for repairs and are Automotive Service Excellence (ASE) certified.

  

  Automotive Specialist

  Expert Respond

  Showtime your vehicle and turn on the AC with the fan on loftier. Then, cycle through the selector options on your HVAC control, feeling for cold air from each position. Positions that don't blow common cold air may take a temperature sensor upshot, while positions that don't blow any air might take a blend door actuator problem.

• Question

  How do I know if my AC fan is bad?

  

  Ed Beery is an Automotive Specialist and the Owner of InTechgrity Automotive Excellence based in Denver, Colorado. With more than viii years of feel, he specializes in providing maintenance and repair services for both individuals and companies. Ed and the InTechgrity Automotive Excellence Team are canonical by the American Automobile Clan (AAA) for repairs and are Automotive Service Excellence (ASE) certified.

  

  Automotive Specialist

  Expert Answer

  Your Ac fan will either have inconsistent air move or no air movement at all.

• Question

  How do I know if my pulley is bad?

  

  Ed Beery is an Automotive Specialist and the Owner of InTechgrity Automotive Excellence based in Denver, Colorado. With more than viii years of experience, he specializes in providing maintenance and repair services for both individuals and companies. Ed and the InTechgrity Automotive Excellence Team are approved by the American Automobile Association (AAA) for repairs and are Automotive Service Excellence (ASE) certified.

  

  Automotive Specialist

  Proficient Respond

  The pulley either doesn't turn or turns inconsistently when the AC clutch engages.

• Question

  What happens when an Air conditioning belt goes bad?

  

  Ed Beery is an Automotive Specialist and the Owner of InTechgrity Automotive Excellence based in Denver, Colorado. With more eight years of experience, he specializes in providing maintenance and repair services for both individuals and companies. Ed and the InTechgrity Automotive Excellence Team are approved past the American Automobile Association (AAA) for repairs and are Automotive Service Excellence (ASE) certified.

  

  Automotive Specialist

  Skilful Answer

  You might observe a high-pitched squeal or chirp from the belt when the Air conditioning is turned on. There might also be intermittent cooling in the system as the belt gains and loses traction.

• Question

  How exercise I know if my Air-conditioning clutch is bad?

  

  Ed Beery is an Automotive Specialist and the Possessor of InTechgrity Automotive Excellence based in Denver, Colorado. With more eight years of experience, he specializes in providing maintenance and repair services for both individuals and companies. Ed and the InTechgrity Automotive Excellence Squad are approved past the American Car Association (AAA) for repairs and are Automotive Service Excellence (ASE) certified.

  

  Automotive Specialist

  Practiced Answer

  The tell-tale signs of a bad Air-conditioning clutch are the clutch not engaging when the Ac is turned on (and voltage is present); the clutch clicking or banging but not engaging when the Air-conditioning is turned on; the clutch slipping in and out of gear when the Air conditioning is turned on; and/or the vehicle idle dropping noticeably when the AC is turned on.

• Question

  How do you know if your car Air conditioning is depression on gas?

  

  Ed Beery is an Automotive Specialist and the Owner of InTechgrity Automotive Excellence based in Denver, Colorado. With more than than viii years of experience, he specializes in providing maintenance and repair services for both individuals and companies. Ed and the InTechgrity Automotive Excellence Team are approved by the American Automobile Association (AAA) for repairs and are Automotive Service Excellence (ASE) certified.

  

  Automotive Specialist

  Expert Answer

  Low or no gas might be the problem if air is flowing throughout the system when the AC is turned on; the air is non cold or cool and doesn't get cold or cool anywhere in the arrangement; the AC compressor is turning; the AC clutch is not making noise; and the Air-conditioning clutch engages when the AC is turned on.

• Question

  Can a blown fuse box crusade your Air-conditioning not to piece of work?

  

  Sure, if the fuse that feeds your Air conditioning compressor or relays is blown and non delivering +12VDC yous will accept no AC.

• Question

  What practise I exercise if my A/C isn't blowing air?

  

  Peradventure either a fuse or the blower motor isn't working. Bank check the fuses under the hood, and check under your glove compartment for a cylinder shaped motor. With the A/C on, gently jerk the cord to test for a brusque in the adapter. If this doesn't work, then y'all can use a fuse tester to see if your blower motor is getting power.

• Question

  My truck rut works; information technology defrosts, but only on iii and 4. It only blows hot air on three and iv. I've put coolant in it, and it works for a few seconds, and so stops. I checked for leaks, and it doesn't accept whatsoever. What can I endeavor adjacent?

  

  A blower motor may have a resistor trouble if your air only blows on the high setting but volition not blow on a lower setting.

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• Do not add refrigerant unless you are sure that low refrigerant is the cause of the problem considering overfilling the organization with also much refrigerant can cause astringent damage.

• It is always best to consult a professional to do repairs to your vehicle.

• Wear safety spectacles and work in an open up surroundings, where fumes won't overwhelm y'all. Never bear on your eyes or oral fissure afterwards treatment Freon or other chemicals. Habiliment long sleeves and gloves whenever possible.^[eleven]

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Article Summary X

To diagnose why the ac in your car isn't working, start by turning your car on and setting the Ac to full smash. If foreign noises are coming from the AC, at that place could be an event with the compressor and it may need to exist fixed or replaced. If there's low air pressure coming out of the vents, you lot may need to supplant the cabin air filter or set up the blower motor. If the air coming out is warm, the coolant could be leaking or y'all may need to clean the Air conditioning condenser. To acquire other issues that might be causing your car'southward AC to non piece of work properly, keep reading.

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Source: https://www.wikihow.com/Diagnose-a-Non-Working-Air-Conditioning-in-a-Car

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