Category: A/C Performance Test

ac temperature out of the vents

How do I check the temperature of my car AC?

How do I check the temperature of my car AC?

 

 SYSTEM PERFORMANCE TEST

How do I check the temperature of my  2015 Mazda 6 AC?

1. Measure the air conditioner output temperature after approx.10 min have elapsed from engine start.

2. Place a dry-bulb thermometer in the driver-side center Vent outlet.

  1. Start the engine and warm it up.

    4. Set the fan speed to MAX HI.

    5. Turn the A/C switch on.

    6. Set to RECIRCULATE mode.

    7. Set the temperature control to MAX COLD.

    8. Set to VENT mode.

    9. Close all the doors and windows.

    10. Maintain the engine speed at 1,500 rpm.

    11. Wait until the air conditioner output temperature stabilizes.

    Stabilized condition
    – The A/C compressor repeatedly turns on and off at regular intervals.

    12. After the blower air is stabilized, read the dry-bulb thermometer.

    13. Verify the ambient temperature.

    14. Verify that the temperature reading is in the shaded zone.

 

AMBIENT TEMPERATURE CENTER VENT TEMPERATURE

41 F

39.5 F

50 F

4.5 F

59 F

41 F

68 F

42 F

77 F

43 F

86 F

43.5 F

95 F

47 F

104

50 F

 

We could easily know what should the a/c temperature be at the vents be checking this manufacturer chart. If the A/C system in the car is working properly the temperature should be near these values.

ac temperature out of the vents

How cold should my AC be at the vent in my car?

The ambient air temperature must be at least 16°C (60°F) .

Do not induce additional air flow across the front of the vehicle during the test.

 

What temperature should the A/C blow ? 

The A/C system is designed to provide the passenger compartment with low temperature and low humidity air. During periods of high heat and humidity, an A/C system will be more effective in the Recirculation mode (MAX-A/C).

We could easily know what should the A/C temperature be at the vents be checking this manufacturer chart. Taking into account  50-60 % relative humidity and an ambient air temperature of 77 F,86 F,95 F ,the discharge air temperature at the center vent should be in the range of :

50-54 F

56-60 F

63-70 F

if the A/C system in the car is working properly.

How cold should my AC be at the vent in my car?

A performance test is the best way to determine whether the system is performing up to design standards. This test also provides valuable clues as to the possible cause of trouble with the A/C system.

How do I check the temperature of my car AC?

Testing must be performed as follows:

Vehicle location Indoors or in the shade (in a well-ventilated place)
Doors Closed
Door Windows Open
Hood Open
TEMP. Max. COLD
Mode switch Front (ventilation) set
Recirculation switch Set (in-cabin recirculation ) set
Blower Max. speed test
Engine speed Idle speed
Operate the air conditioning system for 10 minutes before taking measurements

 

 

TEST READING

Recirculating-to-discharge Air Temperature Table

Inside air(Recirculation air) at blower assembly inlet  

Discharge air temperature at center vent

F

Relative humidity

%

Air temperature

F

 

50-60

77 F

  50-54

86 F

56-60

95 F

63-70

60-70

77 F

54-59

86 F

60-67

95 F

70-76

***This values are for NISSAN-DATSUN Maxima V6 3.5L***