318ti.org forum

Go Back   318ti.org forum > Technical, Maintenance and Modifications > HVAC

Notices

HVAC Heating, ventilation and air conditioning.

.
» Recent Threads
Ultra low mile 96 318ti...
Today 05:52 AM
Last post by Andy318is
Today 05:52 AM
0 Replies, 57 Views
WTB M-Tech Rear bumper.
02-17-2021 03:20 AM
Last post by scottgen8
Today 02:26 AM
4 Replies, 836 Views
1996 bmw 318ti
02-19-2021 06:20 AM
Last post by Mark Compos
02-25-2021 11:18 PM
2 Replies, 942 Views
BMW E36 Compact ti...
02-25-2021 06:17 AM
Last post by FunElan
02-25-2021 10:14 PM
1 Replies, 213 Views
Brake Line Clip
02-22-2021 05:43 PM
Last post by ti tinkerer
02-25-2021 09:55 PM
1 Replies, 486 Views
Coolant Sensor Resistance
02-24-2021 03:19 AM
Last post by paul somlo
02-24-2021 03:19 AM
0 Replies, 380 Views
Camshaft Sensor Output...
02-24-2021 03:17 AM
Last post by paul somlo
02-24-2021 03:17 AM
0 Replies, 233 Views
S52-Powered 1998 BMW...
11-15-2020 03:55 AM
Last post by stevenwrichards
02-23-2021 09:19 PM
15 Replies, 5,602 Views
free itbs to give away
02-18-2021 06:47 PM
Last post by ZEK
02-21-2021 07:12 AM
3 Replies, 908 Views
Driveshaft differences...
02-21-2021 06:56 AM
Last post by beamsemyboy
02-21-2021 06:56 AM
0 Replies, 367 Views
Reply Share/Bookmark
 
Thread Tools Display Modes
Old 07-13-2020, 02:13 AM   #1
Boston_Green_m42ti
Junior Member
 
Join Date: Feb 2015
Location: Albuquerque, NM
Posts: 7
iTrader: (0)
Default Troubleshooting AC - Compressor works, low side pressure good

Hi all,

Well, after driving 2 hours in 106 degree weather yesterday, my wife has finally convinced me to tackle fixing the AC in my 1998 318ti.

I first checked the compressor and the clutch was not engaging. Long story, short, the system was empty and therefore the pressure switch (I think in the dryer) was not allowing the AC relay (#14 in the fuse box) to activate the clutch.

FYI - when working the relay closes to allow a 12 V DC signal to pass through fuse 39 and engage the electromagnetic clutch on the compressor. I trouble shot this by jumping the relay to show the clutch worked, and then refilling the system, and putting the relay back in place.

The clutch now engages when I hit the AC button inside and I have 35 PSI on the low side when the AC is compressor is running. But I still have hot air at the vents.....

I've hit the limit of my Bentley manual which mostly covers the non-ti HCAV systems.


Any thoughts why? Is there some flap that needs to be opened to allow air to come in from over the evaporator? I have fixed the boden cable that controls the heat flap, but is there something else that I'm missing for the AC? I see there is an "AC control module" listed in realoem. (#3 in attached image). Anyone know what this does?

Any thoughts or help appreciated. Thanks!!
Attached Thumbnails
Click image for larger version Name:	Screen Shot 2020-07-12 at 6.06.50 PM.jpg Views:	240 Size:	46.5 KB ID:	17898  
Boston_Green_m42ti is offline   Reply With Quote
Reply

Bookmarks


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Misc parts CenCoast CA: Trade Interior Parts for Good Beer Strawman Parting out & Parts (US) 12 09-04-2017 05:24 PM
WTB - Ti low miles good condition not a project Scoot US and North America 0 04-24-2012 08:34 PM
PA Three Style 22 (DS1) Wheels - 2 Good, 1 not so good zboot US and North America 2 10-05-2010 06:09 PM
SAP (Secondary Air Pump) Repairs cali-ti Knowledge Base 5 01-23-2010 11:10 PM
Good parts, Low Price, Garik Garuntee M3_KILL3R US and North America 1 07-29-2008 04:50 AM


All times are GMT +1. The time now is 07:38 PM.


.
Powered by site supporters
vBulletin Version 3.8.8
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.
Copyright ©1999 - 2021, 318ti.org
© vBadvanced CMPS v3.2.2
[page compression: 65.83 k/75.32 k (12.60%)]

318ti.org does not warrant or assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information or products discussed.