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Weak A/C after multi freon charging #4541335
10/12/17 04:05 PM
10/12/17 04:05 PM
Joined: Dec 2016
Posts: 40
Egypt
Omar_Eltahan Offline OP
Omar_Eltahan  Offline OP
Joined: Dec 2016
Posts: 40
Egypt
I have a chery A5 car, its model has only fresh air filter, no filter for circulation a/c.

I was running a/c with low and fan speed at 2 or 3 Max. I'm in Egypt so temp. Reaches 40+ easily in summer.

A few months ago a/c went weak in air flow not cooling temp. Means that front seats passengers will feel ok with fan on 4+ while back seat passengers feel hot even with the back air vents located in middle console.

freon Ratio is fixed and I've changed freon machines many times by changing places, also I've cleaned the evaporator and external fresh air filter, even changing it also I've cleaned the blower, all of that without positive results.

Do I have to change the blower or you may recommed another solution?


2012 Chery A5 1.6L

Engine:Castrol Magnatec 10w40
Transmission:Mobil 80w90
Brake:Castrol DOT4
Power Steering:Unknown
Radiator Coolant:Mobil HOAT 33% EG
Re: Weak A/C after multi freon charging [Re: Omar_Eltahan] #4541343
10/12/17 04:15 PM
10/12/17 04:15 PM
Joined: Jun 2003
Posts: 5,920
Illinois
SHOZ Offline
SHOZ  Offline
Joined: Jun 2003
Posts: 5,920
Illinois
Maybe a blend door problem in the duct work?


2008 Hyundai Accent 1.6L 5 sp manual hatchback
2010 Hyundai Genesis Coupe Track 2L Turbo 6sp manual
Re: Weak A/C after multi freon charging [Re: Omar_Eltahan] #4541352
10/12/17 04:25 PM
10/12/17 04:25 PM
Joined: Jan 2004
Posts: 4,146
California
nthach Offline
nthach  Offline
Joined: Jan 2004
Posts: 4,146
California
How are the system pressures between the low and high side? Are the blend doors properly switching over between the heater core and evaporator? Did you blindly add refrigerant without checking for leaks and the system high/low side pressures?

Re: Weak A/C after multi freon charging [Re: Omar_Eltahan] #4541448
10/12/17 06:46 PM
10/12/17 06:46 PM
Joined: Dec 2016
Posts: 40
Egypt
Omar_Eltahan Offline OP
Omar_Eltahan  Offline OP
Joined: Dec 2016
Posts: 40
Egypt
I've tested pressure and leak on vacuum pressure machine and everything is ok.

What're blend doors?


2012 Chery A5 1.6L

Engine:Castrol Magnatec 10w40
Transmission:Mobil 80w90
Brake:Castrol DOT4
Power Steering:Unknown
Radiator Coolant:Mobil HOAT 33% EG
Re: Weak A/C after multi freon charging [Re: Omar_Eltahan] #4541452
10/12/17 06:50 PM
10/12/17 06:50 PM
Joined: Jun 2003
Posts: 5,920
Illinois
SHOZ Offline
SHOZ  Offline
Joined: Jun 2003
Posts: 5,920
Illinois
Blend door is under the dash after the blower and before the evap and heater core. Usually a motor goes bad on it.


2008 Hyundai Accent 1.6L 5 sp manual hatchback
2010 Hyundai Genesis Coupe Track 2L Turbo 6sp manual
Re: Weak A/C after multi freon charging [Re: Omar_Eltahan] #4541511
10/12/17 07:28 PM
10/12/17 07:28 PM
Joined: Dec 2016
Posts: 40
Egypt
Omar_Eltahan Offline OP
Omar_Eltahan  Offline OP
Joined: Dec 2016
Posts: 40
Egypt
It works fine, have tested it too.


2012 Chery A5 1.6L

Engine:Castrol Magnatec 10w40
Transmission:Mobil 80w90
Brake:Castrol DOT4
Power Steering:Unknown
Radiator Coolant:Mobil HOAT 33% EG
Re: Weak A/C after multi freon charging [Re: Omar_Eltahan] #4541912
10/13/17 07:47 AM
10/13/17 07:47 AM
Joined: Jun 2003
Posts: 5,920
Illinois
SHOZ Offline
SHOZ  Offline
Joined: Jun 2003
Posts: 5,920
Illinois
Maybe the fan blade/cage on the blower is slipping? I would take the blower out and apply 12v directly too it and see what it does.


2008 Hyundai Accent 1.6L 5 sp manual hatchback
2010 Hyundai Genesis Coupe Track 2L Turbo 6sp manual
Re: Weak A/C after multi freon charging [Re: Omar_Eltahan] #4541921
10/13/17 07:58 AM
10/13/17 07:58 AM
Joined: Jun 2003
Posts: 5,920
Illinois
SHOZ Offline
SHOZ  Offline
Joined: Jun 2003
Posts: 5,920
Illinois
Some newer cars use solid state controllers for the fan speed output. When these go bad the fan becomes unresponsive to input commands.

Is there a way to do a self test on the Climate Control system? Maybe something in your manual says how to do this.


2008 Hyundai Accent 1.6L 5 sp manual hatchback
2010 Hyundai Genesis Coupe Track 2L Turbo 6sp manual
Re: Weak A/C after multi freon charging [Re: Omar_Eltahan] #4541932
10/13/17 08:08 AM
10/13/17 08:08 AM
Joined: Dec 2016
Posts: 40
Egypt
Omar_Eltahan Offline OP
Omar_Eltahan  Offline OP
Joined: Dec 2016
Posts: 40
Egypt
I'll check.


2012 Chery A5 1.6L

Engine:Castrol Magnatec 10w40
Transmission:Mobil 80w90
Brake:Castrol DOT4
Power Steering:Unknown
Radiator Coolant:Mobil HOAT 33% EG

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