IPB

Welcome Guest ( Log In | Register )

 
Reply to this topicStart new topic
> A/C or not A/C..?, pop quiz
dante giacosa
post 29th March 2017 13:16
Post #1 | Print


1.4 16v
**

Group: Regular
Posts: 285
Joined: 28th March 2017
Local Time: 18th November 2017 08:36
Member No.: 13,068
Driving: 146 CF2 1.8 T-spark
From: Edinburgh



Hello everyone,

just picked up my new (W-plate) 146 1.8 CF2 on Monday, and i have one strange, but immediate, overriding question...

how does one 'know' when one's Air Conditioning is actually on?

I ask, because the A/C switch on my car works- in that it goes in & out and illuminates a green dot on the button- the engine revs however, do not change at all- I can sense no mechanical loading or hear a magnetic-clutch engaging on the compressor, but

CONVERSLEY

the air coming from the vents is absolutely freezing!

it is either freezing or warm- there doesn't seem to be a linear roll over into temperature. in my experience; this feels like the A/C is on all the time, irrespective of the control switch.

is there a specific fuse that would stall the compressor, to allow me to check..?

any advice!????

thankyou

HANGON- I've got another question!-

are the column-stalks for indicators/lights/wipers supposed to backlight at night when the headlights are on...?

HANGON AGAIN- I know the answer to that bit now!

This post has been edited by dante giacosa: 29th March 2017 14:59
Go to the top of the page
View Vehicles
+Quote Post
GialloEvo94
post 31st March 2017 20:31
Post #2 | Print


Forum Administrator
*******

Group: Admin
Posts: 9,490
Joined: 11th June 2005
Local Time: 18th November 2017 08:36
From: South Oxfordshire, UK
Member No.: 954
Driving: Alfa 145 QV, Lancia Delta Integrale Evo, SEAT Leon Mk2 FR+ TDI DSG
From: South Oxfordshire, UK



Before going into any diagnosis scenarios, if you look under the bonnet where the aircon compressor is (right at the front left side of the engine if looking into the engine bay from the front of the car), you will see a single green wire going to it with a connector on. This is the clutch engagement control wire for the compressor. If you temporarily pull apart that connector, the clutch in the compressor will never be able to engage so this will effectively disable the aircon.

Try doing this and see if your cabin is still as cold as you previously described with the heater control set to the cold position, or if it is now warmer in that position with the aircon compressor disabled.


--------------------
Go to the top of the page
View Vehicles
+Quote Post
dante giacosa
post 31st March 2017 23:41
Post #3 | Print


1.4 16v
**

Group: Regular
Posts: 285
Joined: 28th March 2017
Local Time: 18th November 2017 08:36
Member No.: 13,068
Driving: 146 CF2 1.8 T-spark
From: Edinburgh



Thank you Giallo-

When I pull the green line: will I be able to see the compressor disengage..?
Go to the top of the page
View Vehicles
+Quote Post
GialloEvo94
post 1st April 2017 07:34
Post #4 | Print


Forum Administrator
*******

Group: Admin
Posts: 9,490
Joined: 11th June 2005
Local Time: 18th November 2017 08:36
From: South Oxfordshire, UK
Member No.: 954
Driving: Alfa 145 QV, Lancia Delta Integrale Evo, SEAT Leon Mk2 FR+ TDI DSG
From: South Oxfordshire, UK



The clutch is inside the compressor so you won't actually see anything but you might hear a click as the clutch engages/disengages, although the noise of the engine may drown that out anyway.

The easiest way to find out if the the compressor is switched on is to measure the voltage on the green wire. If you're getting 12v on it then it means that the compressor clutch is engaged. With the aircon switched off you should be getting zero volts on that wire.


--------------------
Go to the top of the page
View Vehicles
+Quote Post
dante giacosa
post 1st April 2017 10:28
Post #5 | Print


1.4 16v
**

Group: Regular
Posts: 285
Joined: 28th March 2017
Local Time: 18th November 2017 08:36
Member No.: 13,068
Driving: 146 CF2 1.8 T-spark
From: Edinburgh



That is terrific-

Thankyou for that: I can do that easily.

Would I be able to discern a change in engine load, as the clutch comes out..?


Although I am away on holiday this week now, and have just got a custom car cover to keep the car under, until next weekend.

This post has been edited by dante giacosa: 1st April 2017 10:29
Go to the top of the page
View Vehicles
+Quote Post
dante giacosa
post 9th April 2017 11:28
Post #6 | Print


1.4 16v
**

Group: Regular
Posts: 285
Joined: 28th March 2017
Local Time: 18th November 2017 08:36
Member No.: 13,068
Driving: 146 CF2 1.8 T-spark
From: Edinburgh



Right,

I now know that the green 12v line to the compressor, is not energised.

So my AC is not running after all!
Go to the top of the page
View Vehicles
+Quote Post

Reply to this topicStart new topic

 



- Lo-Fi Version Time is now: 18 Nov 2017 08:36