Aircon- How Cold?

[widu13]

Sorry for yet more aircon questions. Mine is working but badly! My entire (everything) aircon system was replaced last September when the compressor expired and metal swarthes were circulated around the system. Before this it was ice cold and is now running noticeably warmer. I compared it against the Gal at work (6 months older) which was also ice cold.

 

I booked in in the following month and was told it was running at spec at 6 C. I told them I found that difficult to believe as it was performing so poorly (even in October), but they maintained their stance.

 

Following the hot weather when it made only a slight difference when on speed 3 or 4 on the fan, the tempreature still hot enough inside to be only barely comfortable, I booked it back in today. I have just brought it back. They had it for literally 15 mins and didn't have it in the workshop before announcing to me that it was running at spec at 6 C.

 

I told the receptionist that I wasn't happy and she said anything between 3-8 C was acceptable but they would regas it for me at a charge which should lower the temp by up to 2 C. I said shouldn't the gas be good for 2 yrs and she said yes! They wouldn't budge, saying it is fine.

 

Comments, ideas?

[NikpV]

Have a look in the faq there is a temperature chart (taking into account outside temp in the shade) there which gives the acceptable ranges IIRC it must be running for 10 mins with the engine doing 1500rpm before the temp is measured

[widu13]

Already checked the FAQ, but I think that the air being blown is only COOL not COLD. It is definately NOT as cold as it used to be.

[Masked Marauder]

You need to put a thermometer into the center air vent and another outside the car in the shade. Turn off all other vents, put the system to recirculated air and run it at 1500rpm for 10 minutes with the doors and windows closed. You then read the thermometers and compare to the chart in the FAQs.

[Ogben Schmutzel]

When my aircon was working but paranoia was high I just used a conventional cheapo thermometer and made a wire loop and hung it upside down tight on the centre vent. With the fan set at just under half way (this is on a CC system) on the 4 mile drive home to/from work the temp at the vent used to get down to 5 or 6 C in all but the hottest conditions.

 

Not as technically correct as MM's response but it did the job.

 

I have not heard anyone talk of 2 C before.

 

Also I understand that the correct place to measure the vent temp is a couple of inches into the vent, but you are only looking for a guide. I think I have seen vent thermometers in Halfords for a tenner!

 

Next time ask them to show you the temperature.

 

HTH.

Oggy.

[gazza007]

One of my older posts

 

output temp & testing guide

[NikpV]

ambient /vent temperature

18/ 8-12

20/ 7-11

25 /6-10

30/ 5-9

35 /4.5-8.5

 

ummm the temperatures posted here are exactly the opposite from MM's temperature chart, surely it would make sense that given a certain refrigeration coefficient the higher the outside temp the higher the inside temp. These appear to be the wrong way around :angry:

[Masked Marauder]

Here is the chart, 'A' is center vent temperature after running the engine at 1500RPM with the aircon at fully cold for 10 mins. 'B' is the outside shade temperature. The clear area in the curves is where the vent temperature should be.

 

http://www.fordgalaxy.org.uk/ford/uploads/post-62-1147470528.jpg

[NikpV]

ambient /vent temperature

18/ 8-12

20/ 7-11

25 /6-10

30/ 5-9

35 /4.5-8.5

 

ummm the temperatures posted here are exactly the opposite from MM's temperature chart, surely it would make sense that given a certain refrigeration coefficient the higher the outside temp the higher the inside temp. These appear to be the wrong way around :angry:

 

 

my point exactly :ph34r:

[gazza007]

Not according to the info chart supplied by SEAT which I will try & find. I was also told by a techie that the system works harder the warmer it is outside to compensate for the higher interior temps

[Masked Marauder]

Not according to the info chart supplied by SEAT which I will try & find. I was also told by a tech Iwarmer it is outside to compensate for the higher interior temps

 

Are you talking about air-con or climate control?

[gazza007]

Manual AC

[Masked Marauder]

Well manual air-con is either on or off, there are no temperature sensors to control the heat of the airflow. The temperatures should be as shown on the graph above.

[gazza007]

Well manual air-con is either on or off, there are no temperature sensors to control the heat of the airflow. The temperatures should be as shown on the graph above.

 

I'll dig out the chart & double check

[MrT]

Well manual air-con is either on or off, there are no temperature sensors to control the heat of the airflow. The temperatures should be as shown on the graph above.

 

Does the opposite apply and on a CC unit the incoming air temperature is controlled and will not be at the temperatures on the graph? Or does it just control the volume of incoming cooled air with the fan speed?