home register FAQ memberlist calendar

Go Back   Turbobricks Forums > Mechanical > maintenance & nonperformance

Reply
 
Thread Tools Display Modes
Old 03-11-2019, 10:26 AM   #1
Patestrickland
Board Member
 
Patestrickland's Avatar
 
Join Date: Oct 2017
Location: Emerald Isle, NC
Question 240 ac

So guys the ac on my 93 240 isnít working. My car still blows air itís just not cold. I tried recharging the ac and that didnít work. My power steering still works so my condenser isnít locked up. Should I just replace the whole ac condenser?
Patestrickland is offline   Reply With Quote
Old 03-11-2019, 11:10 AM   #2
Uncleknucklez
bruspeed
 
Uncleknucklez's Avatar
 
Join Date: Apr 2006
Location: Sacramento, CA
Default

Check that the heater valve isn't stuck open?
__________________
1980 242 Turbo
2004 V70R

Uncleknucklez is offline   Reply With Quote
Old 03-11-2019, 01:49 PM   #3
iHateVolvoPeople
Board Member
 
Join Date: Feb 2014
Location: Midwest
Default

Try properly evacuating and recharging the system, but replace the receiver drier first.
__________________
Feedback Thread
Current:
93' 244T m47
93' 245 m47
90' 744 AW70
94' M-Edition Miata, 93k
95' Camry auto, 246k
93' Camry auto, 278k
Past:
80' 242gt m46
88' 245T m47
92' 940 turbo AW71
94' 945T AW71(L?)

Last edited by iHateVolvoPeople; 03-13-2019 at 11:15 PM..
iHateVolvoPeople is offline   Reply With Quote
Old 03-11-2019, 03:02 PM   #4
Harlard
Pro Sneaker Peddler
 
Harlard's Avatar
 
Join Date: May 2007
Location: PDX
Default

Pull everything, make your car lighter and faster. Send it all to me,
__________________


Herr Harlard am Erstens

1979 242 DL

Quote:
Originally Posted by t8fanning View Post
My knob has a big chunk of steel on it
Harlard is online now   Reply With Quote
Old 03-11-2019, 04:35 PM   #5
Matt86
Board Member
 
Matt86's Avatar
 
Join Date: Nov 2012
Location: Woodstock, GA
Default

Is the compressor clutch engaging? Start with that. Check to see if its getting power when activated by the snowflake switch. If not, check the low pressure switch on the accumulator.
__________________
2007 V70 2.4
1989 245 DL
Matt86 is offline   Reply With Quote
Old 03-11-2019, 05:10 PM   #6
Patestrickland
Board Member
 
Patestrickland's Avatar
 
Join Date: Oct 2017
Location: Emerald Isle, NC
Default

I think it might be the heater valve has gone bad. Did some research and i found that if the heater valve is bad then your ac will blow heat all the time which mine does. I will check for the other things too.
Patestrickland is offline   Reply With Quote
Old 03-11-2019, 05:26 PM   #7
2manyturbos
Moderator
 
Join Date: Mar 2003
Location: Monroe, OR USA
Default

Start with the obvious. Is your compressor clutch engaging the compressor?
2manyturbos is offline   Reply With Quote
Old 03-11-2019, 05:36 PM   #8
billkaz
Bomber Dream
 
billkaz's Avatar
 
Join Date: Feb 2010
Location: Maple Ridge, BC
Default

Quote:
Originally Posted by Patestrickland View Post
I think it might be the heater valve has gone bad. Did some research and i found that if the heater valve is bad then your ac will blow heat all the time which mine does. I will check for the other things too.
I know that is true for the older style brass heater valves, which where phased out in 1991 as I recall. Not sure if the newer style fail in the same manner.
__________________
1992 240 Wagon
2006 Mazda6 Wagon




billkaz is offline   Reply With Quote
Old 03-11-2019, 05:43 PM   #9
dl242gt
300+hp on the shelf club
 
dl242gt's Avatar
 
Join Date: Jun 2002
Location: S NJ, a suburb of Phila.
Default

it's very important to have the correct amount of refrigerant. That said I would start with making sure the compressor comes on and if it doesn't check the low pressure switch on the accumulator near the firewall.

Last summer my 93 was blowing warm and the compressor was cycling quite fast yet no cooling. I checked the low side pressure and it was correct. The system was low on refrigerant and once charged up to the proper amount it has worked fine. The only way you know how much is in there is by pulling out the remaining refrigerant and weighing what is removed. Then you can add the correct fill after you leak check the system.
dl242gt is offline   Reply With Quote
Old 03-11-2019, 10:28 PM   #10
Patestrickland
Board Member
 
Patestrickland's Avatar
 
Join Date: Oct 2017
Location: Emerald Isle, NC
Default

Checked to see if the clutch was spinning on the compressor when the ac is turned on and it’s not. Is there a way to fix this?
Patestrickland is offline   Reply With Quote
Old 03-11-2019, 11:57 PM   #11
iHateVolvoPeople
Board Member
 
Join Date: Feb 2014
Location: Midwest
Default

Quote:
Originally Posted by Patestrickland View Post
Checked to see if the clutch was spinning on the compressor when the ac is turned on and it’s not. Is there a way to fix this?
.........yes. There’s a lot of ways to fix this. There’s also a lot of reasons as to why it would not turn on. That’s what you need to diagnose before throwing a new compressor on there.

You can bypass the low pressure switch very easily. This will tell you instantly if you have a clutch issue. And in my opinion it’s the fastest test.

If bypassing it causes the clutch to engage, you likely have a refrigerant level issue.

Last edited by iHateVolvoPeople; 03-12-2019 at 12:04 AM..
iHateVolvoPeople is offline   Reply With Quote
Old 03-12-2019, 12:00 AM   #12
apachechef
Burnt Sierra Madre
 
Join Date: Jan 2009
Location: Fort Joe Smith, Klendathu
Default

Quote:
Originally Posted by billkaz View Post
I know that is true for the older style brass heater valves, which where phased out in 1991 as I recall. Not sure if the newer style fail in the same manner.
They can. I've replaced 1993 ones for that.
__________________
Quote:
Originally Posted by lummert View Post
Dammit, Lummert.
Quote:
Originally Posted by Jesse8931 View Post
Well keep us updated on how your dumbass plan goes.
apachechef is offline   Reply With Quote
Old 03-12-2019, 12:01 AM   #13
apachechef
Burnt Sierra Madre
 
Join Date: Jan 2009
Location: Fort Joe Smith, Klendathu
Default

Quote:
Originally Posted by Patestrickland View Post
Checked to see if the clutch was spinning on the compressor when the ac is turned on and itís not. Is there a way to fix this?
reread reply #5
apachechef is offline   Reply With Quote
Old 03-12-2019, 03:52 PM   #14
Patestrickland
Board Member
 
Patestrickland's Avatar
 
Join Date: Oct 2017
Location: Emerald Isle, NC
Default

I jumped the low pressure switch and the clutch engaged
Patestrickland is offline   Reply With Quote
Old 03-12-2019, 03:54 PM   #15
2manyturbos
Moderator
 
Join Date: Mar 2003
Location: Monroe, OR USA
Default

So, that is telling you the system is low on refrigerant, or, the pressure switch is bad. More likely, the system is just low on refrigerant.
2manyturbos is offline   Reply With Quote
Old 03-12-2019, 04:51 PM   #16
Patestrickland
Board Member
 
Patestrickland's Avatar
 
Join Date: Oct 2017
Location: Emerald Isle, NC
Default

Filled the system up with refrigerant and still no ac. The clutch only engages after I jump the switch off but if I don’t jump it off the clutch won’t spin.
Patestrickland is offline   Reply With Quote
Old 03-12-2019, 04:54 PM   #17
Wren
Porkchop Sandwiches
 
Wren's Avatar
 
Join Date: Jun 2006
Default

What does "filled up the system" mean? Tell us your procedure start to finish.
Wren is offline   Reply With Quote
Old 03-12-2019, 05:59 PM   #18
Patestrickland
Board Member
 
Patestrickland's Avatar
 
Join Date: Oct 2017
Location: Emerald Isle, NC
Default

Turn the car on, turn the ac on, turn the blower on full, fill er up
Patestrickland is offline   Reply With Quote
Old 03-12-2019, 06:01 PM   #19
2manyturbos
Moderator
 
Join Date: Mar 2003
Location: Monroe, OR USA
Default

Quote:
Originally Posted by Patestrickland View Post
Turn the car on, turn the ac on, turn the blower on full, fill er up
In general, that doesn't work. You need the compressor running in order to pull the refrigerant into the system. What did you try to fill it with? Does the can tap have a gage on it?
2manyturbos is offline   Reply With Quote
Old 03-12-2019, 06:32 PM   #20
Kjets On a Plane
Devoid of Luxury
 
Kjets On a Plane's Avatar
 
Join Date: Nov 2002
Location: SoCal Rat-Racer/Douche/Rich Puke Playground, Formerly Pacific Wonderland
Default

The lines are apt to rub thru with worn motor mounts, the 1993 condenser galvanically corrodes, & the compressor can often be worn out at this late date/200Kmi+ of even fairly pampered use give or take some oil soaked mounts/accessory bushings all cockeyed and/or a low charge/low oil to help it kiv out a little sooner.

Technically speaking, a micron gauge, some dye in the oil with the proper flashlight, vacuuming and recharging should help nail it down pretty effing quickly.

This isn't necessarily difficult and/or expensive, especially with an R134a car that uses cheap/abundant/legal refrigerant.

But spending a whole hundred dollars or god forbid reading the repair book/sticker specifying charge weight is against cheap/lazy TB religion...
__________________
How PSI a stock can support?
Always Be Crushing!

Quote:
Originally Posted by JohnMc View Post
If you send me $20$14.99, I'll send you a how-to explaining how to make $20$14.99 from people on the internet.
Kjets On a Plane is offline   Reply With Quote
Old 03-12-2019, 11:15 PM   #21
apachechef
Burnt Sierra Madre
 
Join Date: Jan 2009
Location: Fort Joe Smith, Klendathu
Default

Quote:
Originally Posted by Kjets On a Plane View Post

But spending a whole hundred dollars or god forbid reading the repair book/sticker specifying charge weight is against cheap/lazy TB religion...
Get out of here with your blasphemy!
Proper tools?
A little light reading?
A little forethought and reasoning?
HERETIC!
apachechef is offline   Reply With Quote
Old 03-13-2019, 08:23 PM   #22
Patestrickland
Board Member
 
Patestrickland's Avatar
 
Join Date: Oct 2017
Location: Emerald Isle, NC
Default

Problem solved. The problem was the system was low on refrigerant. I had just filled it up before I made the post but I didn’t fill the system up the right way. Once I got the clutch to engage I filled it up while the clutch was engaged and now my system blows cold. Thanks guys!
Patestrickland is offline   Reply With Quote
Old 03-13-2019, 11:11 PM   #23
dl242gt
300+hp on the shelf club
 
dl242gt's Avatar
 
Join Date: Jun 2002
Location: S NJ, a suburb of Phila.
Default

Enjoy the coolness!
dl242gt is offline   Reply With Quote
Old 03-13-2019, 11:15 PM   #24
iHateVolvoPeople
Board Member
 
Join Date: Feb 2014
Location: Midwest
Default

Quote:
Originally Posted by iHateVolvoPeople View Post
Try properly evacuating and recharging the system, but replace the receiver drier first.
Quote:
Originally Posted by Patestrickland View Post
Problem solved. The problem was the system was low on refrigerant. I had just filled it up before I made the post but I didn’t fill the system up the right way. Once I got the clutch to engage I filled it up while the clutch was engaged and now my system blows cold. Thanks guys!
There ya go!

You should replace the RD before it explodes and destroys your entire AC system.
iHateVolvoPeople is offline   Reply With Quote
Old 03-14-2019, 02:34 PM   #25
2manyturbos
Moderator
 
Join Date: Mar 2003
Location: Monroe, OR USA
Default

There is no reason to replace a receiver drier if the system has not been opened up and exposed to air. ALL automotive AC systems leak refrigerant. The fact his system was low is to be expected.
2manyturbos is offline   Reply With Quote
Reply

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 On

Forum Jump


All times are GMT -4. The time now is 01:34 AM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.