What Would Cause the Air Conditioner to Stop Working Then Start Up Again

It tin can be very frustrating to have your motorcar'due south Air conditioning become out on y'all, especially on a hot twenty-four hours when y'all need it nearly. Luckily at that place are just a few uncomplicated steps that can assistance you lot with diagnosing your vehicle with a non-working Ac. Not only volition they help you diagnose the problem, merely they volition besides aid you lot accept a ameliorate grasp on the workings of your car's Air conditioning system, resulting in a repair that is non only speedy only accurate.

Before starting any of the following steps towards diagnosis, you will want to make sure that your vehicle is on, with the engine running, with both the gear in park and the parking brake engaged. This will ensure you are besides proceeding as safely every bit possible.

Part 1 of 3: Checking the within of the car

Pace ane: Plow on the AC. Plough the auto's fan motor on loftier and press the push to plow on the AC. This can also be labeled as MAX A/C.

The Air-conditioning button has a light on the button that illuminates when the air conditioner is turned on. Verify if this light turns on when you achieve MAX A/C.

If it does not turn on, information technology is an indication that either the switch itself is malfunctioning or the AC circuit is non getting ability.

Step 2: Verify that air is blowing. Verify if y'all are able to feel air blowing through the vents. If you cannot experience any air coming through, effort switching betwixt the different speed settings and feeling for whatsoever kind of air coming through the vents.

If you practice non experience any air or if you only experience air coming through the vents on sure settings, the trouble may prevarication with the AC'south blower motor or the blower motor resistor. Sometimes blower motors and/or their resistors will fail and terminate pushing both hot and common cold air through the vents.

Pace 3: Check the force of airflow. If you are feeling air and the blower motor is allowing the fans to produce air at all speeds, y'all next desire to feel the actual force of the air coming through.

Is information technology weak, even at the highest settings? If you are experiencing a weak strength, and so yous will want to check your motorcar'southward cabin air filter and make certain in that location is nothing obstructing the airway.

Stride 4: Check the temperature of air. Next y'all will desire to check the temperature of the air that the AC is producing.

Use a thermometer, such equally a meat thermometer, and stick information technology within the air vent near the commuter side window. This volition requite yous an idea of the temperature of the air that the AC is producing.

Typically, air conditioners will blow on common cold as depression as 28 degrees F but on a actually warm day where temperatures soar into the high 90s, the air may but blow as low as 50-60 degrees F.

• Tip: Ambience (outside) temperature, besides as air menstruation in general, likewise plays an important part in the air conditioner working properly. A properly working air conditioner will driblet the temperature in the vehicle on average 30-40 degrees cooler than the exterior temperature.

All of these reasons can be crusade for a non working air conditioner and would require the enlisting of a certified mechanic as your next step.

Part ii of three: Checking outside the machine and under the hood

Pace 1: Check for any airflow obstruction. You volition kickoff want to check your grill and bumper, as well equally the area effectually the condenser, and make certain there is not anything obstructing air menstruation. As nosotros mentioned earlier, droppings blocking air menstruum can prevent an AC from functioning properly.

Step two: Bank check the AC belt. At present we will go under the hood and cheque the Air-conditioning chugalug. Some vehicles accept a belt merely for the Air-conditioning compressor. This check is best done with the engine off and the key out of the ignition. If the belt is indeed in that location, push down on the belt with your fingers to see if the chugalug has come loose. If the belt is missing, or if the belt is loose, audit the belt tensioner, replace and install components and recheck the AC for proper function.

Step 3: Heed and inspect the compressor. You can now start the engine dorsum up and return to the engine bay.

Exist sure to leave the Air-conditioning set to loftier or MAX and the blower motor fan on high. Visually inspect the AC compressor.

Await and mind for the compressor clutch engaging on the Air conditioning caster.

It is normal for the compressor to cycle on and off, however if it is non cycling at all or if it is cycling on/off rapidly (within a couple of seconds) you may exist low on refrigerant.

Pace four: Check the fuses. If you practice not hear or see the Air-conditioning compressor cycling, check the appropriate fuses and relays to ensure they are functioning properly.

If you discover bad fuses or relays, information technology is important to supplant them and recheck your AC for performance.

Step five: Cheque the wiring. Finally, if the compressor still does not cycle on and/or off and the AC system has been verified to have the proper amount of refrigerant, then the wiring to the Air conditioning compressor and whatever pressure switches will demand to exist checked with a digital voltage meter to confirm if these components are getting the power they need to part.

Part 3 of 3: Diagnosing a broken AC with Air conditioning manifold gauges

Step 1: Turn off the engine. Turn off your car's engine.

Step two: Locate the force per unit area ports. Open the hood and locate the loftier and depression pressure ports on the Ac system.

Pace 3: Install the gauges. Install your gauges and start the engine back up with the Air conditioning on Max or high.

Step iv: Check your pressure. Depending on the outside temperature, your low side pressure should be typically effectually 40psi and typically the loftier side will vary from 170psi to 250psi. This is depending on the size of the AC organisation, besides as the ambient temperature outside.

Footstep 5: Verify the read-outs. If i or both pressure readings are out of range, this is verification your vehicle has a non working air conditioner.

If the system is low or completely out of refrigerant, you have a leak and information technology will demand to be inspected as before long as possible. Leaks are commonly institute at the condenser (due to it'due south location being right behind the car's grill and in turn field of study to rocks and other road debris puncturing it) simply leaks can also announced where piping fittings and hoses come together. Typically you will encounter oily dirt effectually the joints or surface area of the leak. If a leak cannot be detected visually, the leak may be too small-scale to encounter, or even deep within the dashboard. These kinds of leaks are unable to be seen and will demand to be inspected by a certified mechanic, such every bit one from YourMechanic.com.

Stride 6: Re-charge the arrangement. Once you discover the leak and accept information technology repaired, the system needs to be charged with the proper amount of refrigerant and the system needs to exist rechecked for proper function.

Verifying a not working air conditioner is merely the get-go pace in a longer process. Your side by side step is to find someone with the knowledge, feel and certified tools to get the repair job done safely and correctly. At present however, you practise have more data you tin can pass on to your mobile mechanic, for a quicker, more than accurate repair. And if you enjoy the freedom to have the repair done at home or piece of work, you lot tin notice someone just like that with YourMechanic.com

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more than details

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Source: https://www.yourmechanic.com/article/how-to-check-a-broken-air-conditioner

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