Yesterday I Replaced a Ac Fan Fuse on My 2011 Chevy Impala and It Was Fine. Today No Cold Air Again

It can be very frustrating to have your car's Ac become out on you, especially on a hot day when you lot need it near. Luckily at that place are just a few simple steps that can assistance you with diagnosing your vehicle with a non-working AC. Non only volition they help y'all diagnose the problem, but they volition too assistance you have a better grasp on the workings of your automobile's Ac system, resulting in a repair that is not simply speedy just accurate.

Earlier starting any of the following steps towards diagnosis, you volition want to brand certain that your vehicle is on, with the engine running, with both the gear in park and the parking restriction engaged. This will ensure you are too proceeding as safely every bit possible.

Role 1 of 3: Checking the inside of the motorcar

Step 1: Plough on the AC. Turn the car's fan motor on high and press the button to plow on the AC. This can also be labeled as MAX A/C.

The AC push button has a lite on the button that illuminates when the air conditioner is turned on. Verify if this light turns on when y'all reach MAX A/C.

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

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

If you do non experience any air or if you only experience air coming through the vents on certain settings, the trouble may lie with the Ac's blower motor or the blower motor resistor. Sometimes blower motors and/or their resistors will neglect and stop pushing both hot and cold air through the vents.

Step 3: Check the strength of airflow. If you are feeling air and the blower motor is assuasive the fans to produce air at all speeds, you lot next desire to feel the actual force of the air coming through.

Is information technology weak, fifty-fifty at the highest settings? If you are experiencing a weak force, and so you volition want to check your car'due south cabin air filter and brand sure there is nothing obstructing the airway.

Step 4: Bank check the temperature of air. Next you volition desire to bank check the temperature of the air that the AC is producing.

Employ a thermometer, such as a meat thermometer, and stick it within the air vent almost the driver side window. This will give you an idea of the temperature of the air that the Air-conditioning is producing.

Typically, air conditioners will blow on common cold as low as 28 degrees F but on a really warm day where temperatures soar into the high 90s, the air may only blow as low equally l-sixty degrees F.

• Tip: Ambient (outside) temperature, as well every bit air flow in general, also plays an important role in the air conditioner working properly. A properly working air conditioner will drop the temperature in the vehicle on average 30-forty degrees libation than the outside temperature.

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

Part two of 3: Checking outside the machine and under the hood

Step ane: Check for any airflow obstacle. Yous volition start want to check your grill and bumper, every bit well as the area around the condenser, and make sure in that location is not anything obstructing air flow. As we mentioned earlier, debris blocking air menses can foreclose an AC from operation properly.

Step 2: Bank check the Ac chugalug. Now nosotros will go under the hood and check the AC belt. Some vehicles have a belt just for the Ac compressor. This check is best done with the engine off and the key out of the ignition. If the belt is indeed there, push down on the chugalug with your fingers to run across 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 role.

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

Be sure to leave the Air-conditioning gear up to high or MAX and the blower motor fan on high. Visually inspect the Ac compressor.

Expect and heed for the compressor clutch engaging on the Ac caster.

Information technology is normal for the compressor to cycle on and off, however if it is not cycling at all or if it is cycling on/off rapidly (within a couple of seconds) you may be depression on refrigerant.

Step 4: Check the fuses. If you lot do non hear or encounter the AC compressor cycling, check the advisable fuses and relays to ensure they are performance properly.

If y'all discover bad fuses or relays, information technology is important to supervene upon them and recheck your AC for performance.

Step 5: Check the wiring. Finally, if the compressor still does non cycle on and/or off and the Ac system has been verified to have the proper amount of refrigerant, then the wiring to the Ac compressor and whatever pressure switches volition need to be checked with a digital voltage meter to confirm if these components are getting the power they need to function.

Part iii of 3: Diagnosing a cleaved Air conditioning with Air-conditioning manifold gauges

Footstep 1: Turn off the engine. Plough off your car'due south engine.

Stride 2: Locate the pressure ports. Open up the hood and locate the loftier and low pressure ports on the AC system.

Step iii: Install the gauges. Install your gauges and offset the engine back up with the AC on Max or high.

Step 4: Check your force per unit area. Depending on the outside temperature, your low side force per unit area should be typically around 40psi and typically the high side will vary from 170psi to 250psi. This is depending on the size of the Air-conditioning organization, likewise as the ambience temperature outside.

Step 5: Verify the read-outs. If one or both force per unit area readings are out of range, this is verification your vehicle has a non working air conditioner.

If the organization is depression or completely out of refrigerant, you have a leak and it will need to be inspected as presently every bit possible. Leaks are commonly found at the condenser (due to it's location existence right behind the automobile's grill and in plow subject to rocks and other route debris puncturing it) merely leaks can as well appear where pipe fittings and hoses come together. Typically you will see oily dirt around the joints or surface area of the leak. If a leak cannot be detected visually, the leak may be too pocket-size to run across, or even deep inside the dashboard. These kinds of leaks are unable to be seen and will need to be inspected past a certified mechanic, such as one from YourMechanic.com.

Footstep 6: Re-charge the system. Once you discover the leak and have it repaired, the arrangement needs to exist charged with the proper corporeality of refrigerant and the organisation needs to exist rechecked for proper part.

Verifying a not working air conditioner is only the first step in a longer procedure. Your next stride is to detect someone with the knowledge, experience and certified tools to get the repair task done safely and correctly. Now all the same, you do have more data yous can pass on to your mobile mechanic, for a quicker, more accurate repair. And if you enjoy the freedom to accept the repair washed at home or work, y'all can find someone just similar that with YourMechanic.com

The statements expressed to a higher place are only for informational purposes and should be independently verified. Please see our terms of service for more details

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

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