Interesting A/c problem on E34

[BrianJ]

Hi guys,I've encounted this a/c 'problem' twice. First time 2 months ago and last was yesterday. Both times it 'fixed itself' after a day.Attached below is a pic for reference. There is this tiny light which comes on when u turn ignition to on position (indicated by green arrow). When this happens, the entire a/c goes silent, meaning there's no blower, no compressor working, nothing.

Checked all fuses at the main box in the engine compartment, under rear seat, all fine. Yesterday i removed the a/c panel, removed all the sockets behind, sprayed contact cleaner. ...nothing changed.Drove to work today no aircon,... Lunch time went out, the tiny light was off, so tried the a/c and everything works fine.Im baffled... anyone knows what that light indicates? Cos both occassions that light came on when the a/c doesnt work. When u dont see that light all will work as per normal. No Naidu here in melaka,...haha...Okie thanks guys.

 

[BrianJ]

On my way back this evening, i realised that it could be the receiver/drier that might be getting 'clogged' hence the pressure sensor on the unit may relay a fault message (possibly that small light which im getting), this in turn may 'cut-out' the aircon system for safety measures. All assumptions here.... anyway will go and get the receiver/drier changed 2moro.

Any suggestions, comments / answers from all the Sifus here...

 

[XXX]

it could be the aircond module (something like the ECU for the aircond) thats why its acting bonkers...my problem is my blower only works at 4, 1,2 & 3 no air but even at 4 the wind blowing out is like at no. 2...mine is confirmed the module..new RM700+..*sigh*

 

[BrianJ]

hi thanks XXX,... yes, the module did cross my mind but usually if its this then you'll usually have at least 1 speed working, usually #4,.. just like yours. Well anyway.... it would be worth the 'look-see'.
Thanks mate for your feedback,. really appreciate it.

 

[maxxsp]

yeah the module in my brother's e34 is also broken. sometimes when you move the dial the speed of the aircon doesnt change.
to replace is so expensive

 

[skinhead]

it could be the aircond module (something like the ECU for the aircond) thats why its acting bonkers...my problem is my blower only works at 4, 1,2 & 3 no air but even at 4 the wind blowing out is like at no. 2...mine is confirmed the module..new RM700+..*sigh*

its the sword

 

[mnk]

its the sword

myself 2 times already change the swords (2nd hand)...
the blower still wind blowing and a/c still come out even i switch off the 1234 button!!!
what shud i do huh?? really give me headache!!!

 

[piquet]

its the sword

Hi bro skinhead,how are things with u..
I am still trying to fix my A/C woes since we last met.My problem is the blower is intermittent at 1 but works fine at 2,3 and 4.But at times,no blower at all at any positions but A/C will normally kick in after a short drive....
Anyway have cleaned the blue solenoid thingy under the blower but still presists.mech suspects the blower carbon....`worth a try

 

[BrianJ]

hi guys,

thanks for all the inputs,....

its not the sword cos i have 3 spare swords with me all in working condition and it does not help... tried all this already.

My most important question is: What is that indication light that pops out on the a/c panel whenever the a/c doesnt work..?? Im sure this light should be a fault indicator trying to tell us something.

I've been tracing the wires over the weekend with the help of a wiring diagram and it's pointing towards the direction of a 'near clogged' receiver/drier which triggers the light indicator on the panel.

All said and done, im replacing the receiver/drier tomorrow and i'll know for sure if that's the cause.

Will keep this updated.
thanks.

 

[Vincent Hor]

hi guys,

thanks for all the inputs,....

its not the sword cos i have 3 spare swords with me all in working condition and it does not help... tried all this already.

My most important question is: What is that indication light that pops out on the a/c panel whenever the a/c doesnt work..?? Im sure this light should be a fault indicator trying to tell us something.

I've been tracing the wires over the weekend with the help of a wiring diagram and it's pointing towards the direction of a 'near clogged' receiver/drier which triggers the light indicator on the panel.

All said and done, im replacing the receiver/drier tomorrow and i'll know for sure if that's the cause.

Will keep this updated.
thanks.

Brian you could be right. The receiver/drier has not been changed before. It came with the half cut so i believe it's an original from day 1.

 

[BrianJ]

Juz to update,... hv replaced the receiver/drier now for almost 10days oredi and all is perfect,.. issue solved.

 

[longan]

erm.. can help with the sword thing??? ermm how does its look like? where it located??
guide pls

 

[zaldy]

problem with the sword..can be fix it?anybody wanna to sell?thx

 

[longan]

told by the aircond mechanic.. also have problem with the 'sword' ... now aircond running at no 4 only.. 1, 2, 3.... no blower..

 

[viewfinder]

Juz to update,... hv replaced the receiver/drier now for almost 10days oredi and all is perfect,.. issue solved.

BrianJ, just curious, what is the 'received/drier' part? I look thru realoem under E34's "Heater and air conditioning" section and I don't see a part with that name. I do come across a part with the name 'drying container'.

Appreciate if you can point out the part based on realoem database.

 

[BrianJ]

receiver drier

viewfinder,

go look here:

http://www.bmwe34.net/Wiki/tiki-index.php?page=Receiver+drier