Realistic Center Vent Temperature of "WORKING" A/C

[SCOPESYS]

As the Topic Title states :

What is a realistic Center Vent Temperature of a 10th Gen Civic, with A/C on FULL ( Recirculate, temp set to Minimum, and engine running at 1500 rpm)

I am not talking about what the Honda Spec may say .. more what is the actual temperature that users are seeing, when they have a fully working A/C system, or just after the "Dealer" has repaired/recharged it,

I see lots of people complaining (justifiably) that their A/C does not seem to blow cold enough, but what in practice is the temperature we should be seeing ?

If you are willing to post results of what you are seeing, please also be sure to include outside temperature, and some idea of the Humidity (as both of these should affect how cold the A/C center event can get )

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[frontlinegeek]

I am on me-cation this week so I will make it a point to do some measures on mine and post the results. I have a digital meter with a probe so I can get it properly into the vent.

 

[xcivicx]

all cars should generally be close to the same, coming out the vent. i do know its not as low as one would think. my si's ac seems to work well the least of the other gen x's i had. takes longer to get going. if i find a thermo i'll measure.

 

[latole]

Any good working A/C ( home, car and other) should send 50 to 55 F cold air. I know it is when it is very hot outside.

I use this test thermometer

 

[xcivicx]

91@40% probe depth about 3 inches center vent closest to center as i could get
started a over 100 took about a min. to see 60ish and stayed there, jacked up idle and it started to fall. on a short drive it fell to just above 50. nice cool day in socal. seemed to cool faster than normal, i never use low, just keep it at 72. the system in this si sees to take longer to be up and running, than either of the lx's i had. plus it seems to get lost as to what its doing when there is a large temp. differential between outside and inside readings.

 

[SCOPESYS]

Note: The faster the Fan speed, the higher the Output Vent temperature will be.

(because the Evaporator is cooling a bigger volume of air when the fan in running faster)

So
Low fan speed = a little VERY cold air
High Fan speed = a lot of quite cold air.

(Low refrigerant = Warn or Hot air !!!)

 

[SCOPESYS]

Here are my results -- I was very pleased !!!
2018 Si, never has had it's A/C serviced (/ messed with)

Outside 85F 80% RH

Car stationary. Recirculate on. Engine 1500 rpm

After 5 minutes:
Fan at Min speed : Cycles between 6 deg C and 10 Deg C (42F and 50F)
Fan at MAX speed: Cycles between 10Deg C and 12 Deg C (50F and 54F)

=====================

So it seems that my Honda's A/C is performing very well - I am thinking my late 2018 Si has the newer, non defective A/C components. ? (Touch wood)

 

[xcivicx]

when mine is on and cooled up, the air that hit my face is quite cool. does feel like every other good ac. watching this also due to all the ac threads

 

[latole]

Here are my results -- I was very pleased !!!
2018 Si, never has had it's A/C serviced (/ messed with)

Outside 85F 80% RH

Car stationary. Recirculate on. Engine 1500 rpm

After 5 minutes:
Fan at Min speed : Cycles between 6 deg C and 10 Deg C (42F and 50F)
Fan at MAX speed: Cycles between 10Deg C and 12 Deg C (50F and 54F)



=====================

So it seems that my Honda's A/C is performing very well - I am thinking my late 2018 Si has the newer, non defective A/C components. ? (Touch wood)

AC work well.

 

[xcivicx]

still had the thermometer stuck in the vent today. just driving around it did dip into the real low 40's
using vintage darkroom/utility dial type. as seen above.

 

[SCOPESYS]

still had the thermometer stuck in the vent today. just driving around it did dip into the real low 40's
using vintage darkroom/utility dial type. as seen above.

Well, there you go -- a 100% in spec, working 2019 A/C -- just as it should be -- and hopefully continue to be for many years ...

 

[latole]

Be careful some mechanical thermometer may do false reading. The best one are old style with mercury ( always sell on the market for / and use by pro )

 

[SCOPESYS]

Be careful some mechanical thermometer may do false reading. The best one are old style with mercury ( always sell on the market for / and use by pro )

A modern Digital thermometer is both inexpensive & accurate.
ie

$6.99 (with free shipping from California)

The Min/max feature on this one is of particular use, for measuring the A/C in the Car

https://www.ebay.com/itm/Instant-Re...-BBQ-Grill-Food-Meat-Thermometer/202576529792
https://www.ebay.com/itm/Instant-Re...-BBQ-Grill-Food-Meat-Thermometer/202576529792
A major ADVANTAGE of the Digital thermometer is its quicker response (over a Mercury or mechanical thermometer).. so it will clearly indicate if your A/C is cycling on/off, something that may be very significant to know about.

 

[latole]

Where do you read how is accurate ? where is % accurate ?
You mean easy to read.

 

[frontlinegeek]

Did some driving around today and the result was 44.24 F center vent with auto on low and fan speed set to low deliberately. With fan set on high, the temp rose to 47.5. Eco mode was NOT on. Outside temps about 75 F and 60% RH. RPM while monitoring temps were between 1250 and 1500.

Note that my car has a replaced condenser and suction hose.

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