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Car AC Problem with Solutions. Low Cooling, Noise, Maintenance Tips

Car AC Problem with Solutions. Low Cooling, Noise, Maintenance Tips

Feeling Problem of Low Cooling or Noise from Car AC System. Tips to Enhance AC Cooling through Cleaning, Gas Recharge, Maintenance Tips

 

Car AC Maintenance

An Effective and Powerful Car AC Performance is the first pre-requisite, which car owner consider to beat in scorching heat of Summers.

Gone are the days, when AC and Power Steering been considered a feature. Now - its just a pre-requisite by default a standard with the car. However, as the car turns older - the AC Performance Effectiveness tends to deteriorate.

With Summers arriving at its peak and temperature hovering above 40 Degree - its important to know

» How to Enhance Cooling Effectiveness 

» Address in Common Problems with Car AC System 

» Tips for Ensuring Long Term Performance Reliability of Car AC

 

Common AC Problems with Solutuions

» Low Cooling - AC Servicing: There is no hardcore principle, that AC Refrigerant gas needs to be refilled every 3 year or so. We are using our Honda City, in its 11 year without any AC Gas refilled and the cooling still effective

Unless a leakage is found, due to which cooling is low. Get all AC Component System inspected first for leaks, before servicing the AC. Once leakage sealers, get the AC Serviced, wherein flushing out and topping back of car AC Refrigerant Gas along with Evaporator Cleaning, Condenser Cleaning, AC Coil Cleaning, Blower Unit cleaning is done . It cost in between Rs 2500 - 3000 across almost all models. Also - ensure Compressor Oil should Mandatorily be replaced when AC been serviced. It costs around Rs 600 to 800 additional and aids in better lubrication to compressor and cooling components of car.

» Noise from Car AC Compressor: If the compressor creating noise, the Workshop may flout you that AC Compressor has problem and may give you estimate of Rs 20K to 40K, but car AC Compressor do not fail like this. It most likely would be the AC Compressor bearing noise or Misaligned AC Tensioner belt, which cost less than rs 1000

AC Problem Solution
Whistle or Hiss Sound from AC System Caused to Low AC Refrigerant Gas, causing pressure on compressor. Get AC Gas Refilled in along with Compressor Oil replacement - will cost in around Rs 2000 to 2500 in most of the cars
Knocking Sound after Filling up AC Refrigerant Its due to overcharging AC Refrigerant Gas which is causing frost on hoses, causing knocking sound
Squeal, Ticking Sound Likely be Mislaigned AC Belt or AC Compressor Bearing (AC Bearing cost Rs 500  - 700 only)
Cooling there but Mild lower Cooling Get AC Condenser Clean, Check & replace AC Pollen Filter. If still doesn’t work  AC Gas started seems leaking
Low Cooling despite AC Gas Refilled in Car AC Cooling Coil seems either bad or not cleaned Properly. If AC Cooling coil (aka as Evaporator Coil) needs replacement will cost Rs 5000 to Rs 6000 as indicative cost 
Cooling not at all or very low cooling AC Gas seems leaked

Common Issues

 

How to Keep Car AC Performance Effective in Summers

» Condenser Cleaning: Condenser cleaning is the first level of cleaning. If the condenser was not cleaned for more than a year, its best to get it cleaned. You can check with bare eyes for the debris, dirt on the condenser. If you visit your professional workshop - there are no charges or maximum Rs 200 for condenser cleaning. No need for complete AC Servicing

» Opening of Window Glasses : Do not Switch on AC while turning on the Ignition. Especially during summers, the car develops greenhouse effect and hot air gets cloaked in the cabin. It unncessarily loads in the compressor. Always, get the window down and switch on in fan mode for the first 2 minutes. Get on to AC, only after 2 minutes - so that entire hot air goes out of the car.

» Switching On / Off the AC : Always switch on the AC in Low mode and then increase the fan speed. Also, before turning the ignition off, switch off the AC first and then fan later on, post which car ignition should be turned off. 

» Using Cabin AC Pollen Filter : Most of the Hatchback and some Compact Sedan cars do not come with Cabin AC Pollen Filter. Not only it traps in Airborne Pollutants but also prevent accumulation of Moisture which may be a first cause of Corrosion. Effective in long lasting AC Performance by preventing Premature malfunction of the air conditioning components. Has Life of 10000 Kms and costs Rs 350 to 600 on an average.

» Air Mode : Car AC system comes in 2 Modes - Fresh Air and Recirculate Air Mode. Though For best AC effectiveness, preferred mode is Recirculation mode and useful when there is pollution or dust outside. However, do not miss to turn on Fresh Air Mode twice a week or atleast once a week. The Recirculated Air in car can become contaminated to breath in for the passengers and important to change to Fresh Air mode for atleast 30 minutes

Car AC System

 

New Car Buyers - Manual AC or Automatic Climate Control

We also recieve some queries on Automatic Climate Control. If you get an option of Automatic Climate Control, go for it. It not only maintains optimal cooling environment in car, but also turns AC Compressor off, when cooling exceeds a point. Lesser operation of compressor leads to better mileage as against Car, as against a car in which AC Compressor is continuously on.

 

AC Maintenance during Winters

AC in Winters : Ensure that even during winters you use in AC for 5 minutes - atleast once in 45 days. It helps the Refrigerant and Compressor Oil Circulation in AC without hardening the hoses. If you do not use AC for a fairly long period of time - you will not get optimal performance when you switch it on during summers

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Important: If you seek advise or recommendation, pls raise query in Car Forum instead of posting in comments

 

Comments 17

Guest - Chow sujing on Wednesday, 14 August 2019 02:42

Only hot air , it need change of compressor or need clean of pipe . AIr loaded

Only hot air , it need change of compressor or need clean of pipe . AIr loaded
Guest - Kedar on Thursday, 18 July 2019 21:53

renault pulse car ac and air blower tripping after 15 min running.. and if we switched off ac for next 5 min again it's working fine for next 15 min...what could be problem

renault pulse car ac and air blower tripping after 15 min running.. and if we switched off ac for next 5 min again it's working fine for next 15 min...what could be problem
Guest - Rishabh on Wednesday, 19 June 2019 17:42

In my new swift tour s no proper cooling of ac in passenger side

In my new swift tour s no proper cooling of ac in passenger side
Guest - Rishabh on Wednesday, 19 June 2019 17:41

Sir in my swift tour s no proper cooling in passenger side my car is only 3 month old

Sir in my swift tour s no proper cooling in passenger side my car is only 3 month old
Guest - HARIKRISHNA on Tuesday, 21 May 2019 21:42

Sorry 50 kms drive

Sorry 50 kms drive
Guest - HARIKRISHNA on Tuesday, 21 May 2019 21:41

Dear sir,
I have Skoda fabia, which has been done around 55000 kms, the problem with the ac is, as we start driving for 50-60, the ac is not working,and then we restart the engine, it is working, can some one give me synopsis of the problem

Dear sir, I have Skoda fabia, which has been done around 55000 kms, the problem with the ac is, as we start driving for 50-60, the ac is not working,and then we restart the engine, it is working, can some one give me synopsis of the problem
Guest - bluestar on Wednesday, 15 May 2019 23:11

Nice Blog! Thank you so much for sharing this kind of wonderful things.

Nice Blog! Thank you so much for sharing this kind of wonderful things.
Guest - jadhav girish on Thursday, 04 April 2019 20:31

VERITO CAR AC WHAT IS LOW PRESSURE PSIG

VERITO CAR AC WHAT IS LOW PRESSURE PSIG
Guest - Shishantchoudhary on Monday, 01 April 2019 22:22

In my swift dzire zdi , last 15 days the ac auto sign is blinking many times , without on mode also blinking and when ac on manually or auto mode is also blinking auto sign ,, otherwise ac working properly

In my swift dzire zdi , last 15 days the ac auto sign is blinking many times , without on mode also blinking and when ac on manually or auto mode is also blinking auto sign ,, otherwise ac working properly
Guest - Prajith Vijayan on Monday, 19 November 2018 18:29

Hi,

I own a Duster 2016 Model which has done 44,000 KM. The AC is giving problems. I have changed the leaking AC Evaporator 3 months ago. Now the AC has a problem. Its efficiency reduces if I drive more than 70-80 KMS. The cooling becomes very low and the air flow is minimal. What can be the problem...Waiting for experts to answer..

Best regards
Prajith

Hi, I own a Duster 2016 Model which has done 44,000 KM. The AC is giving problems. I have changed the leaking AC Evaporator 3 months ago. Now the AC has a problem. Its efficiency reduces if I drive more than 70-80 KMS. The cooling becomes very low and the air flow is minimal. What can be the problem...Waiting for experts to answer.. Best regards Prajith
Guest - Sachin. H on Saturday, 01 December 2018 23:33

Your cars thermostat has failed. Because of which your ac temperature is not cutting off. That results into freezing of air and making air passage thin to pass air. To confirm you can switch of ac and keep on the blower when air flow becomes minimal.

Your cars thermostat has failed. Because of which your ac temperature is not cutting off. That results into freezing of air and making air passage thin to pass air. To confirm you can switch of ac and keep on the blower when air flow becomes minimal.
Guest - Amit on Thursday, 04 October 2018 15:46

Hi,

I have swift petrol 2010, now the AC is not working properly, please advice

Hi, I have swift petrol 2010, now the AC is not working properly, please advice
Guest - Praveen on Wednesday, 15 August 2018 12:12

My i10 era, ac blowing cool air in driver right side and blowing hot air in left side.

My i10 era, ac blowing cool air in driver right side and blowing hot air in left side.
Guest - Ashwin on Thursday, 15 March 2018 10:42

Hi Gagan,

First of all thank you so much for the informative article. My Renault Duster was unused for 12 days and after this when i turned on the AC it started making a rattling noise. From your article it seems like either one of the below or both
-overcharging AC Refrigerant Gas which is causing frost on hoses
-Mislaigned AC Belt or AC Compressor Bearing

My question is in case of the first problem, what is the solution?

Hi Gagan, First of all thank you so much for the informative article. My Renault Duster was unused for 12 days and after this when i turned on the AC it started making a rattling noise. From your article it seems like either one of the below or both -overcharging AC Refrigerant Gas which is causing frost on hoses -Mislaigned AC Belt or AC Compressor Bearing My question is in case of the first problem, what is the solution?
Guest - Prabal K. Mitra on Wednesday, 08 November 2017 18:25

Hi, Gagan Modi,
Your this article alone is worth 50K.
My friend has no idea of car AC
when he went to the Chevrolet service center
they said that the compressor is burnt and it needs to be replaced and it will cost Rs 15000/-
That is when I said to my friend let us look on the internet for more knowledge and found your article.
Many thanks for helping the public.
Best Regards
Prabal K. Mitra



Hi, Gagan Modi, Your this article alone is worth 50K. My friend has no idea of car AC when he went to the Chevrolet service center they said that the compressor is burnt and it needs to be replaced and it will cost Rs 15000/- That is when I said to my friend let us look on the internet for more knowledge and found your article. Many thanks for helping the public. Best Regards Prabal K. Mitra
Guest - Ramkumar on Monday, 28 August 2017 20:25

it's very useful for learners

it's very useful for learners
Guest - Ramamurthy on Thursday, 20 July 2017 07:26

If you can in which small especially 800cc ac is more effective. It will be usefull.

If you can in which small especially 800cc ac is more effective. It will be usefull.
Guest
Monday, 14 October 2019

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