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ChuckS
04-27-2015, 04:53 PM
Hi All,

In my fun of going through my new to me 2005 Sprinter, I find the A/C does work. The clutch does not engage.

The clutch seems to work fine when I give it 12v.

I'm getting 12v out of the proper pin on the back of the heater control.

The wire between the clutch and the control at the dash seems to test fine, <10 ohms, per the service manual. I removed the quick connect plug near the clutch on the clutch control wire and soldered the connection.

I just had Hoekstra evacuate & recharge the system. They suggest I have a bad control at the dash.

Does this make sense to the collected wisdom? I suppose getting 12v does not mean I'm getting 12v with the right amps, so....?

lindenengineering
04-27-2015, 05:08 PM
Most likely the signal wire out of the controller to compressor has a high resistance or is severed.

Introduce an overlay running new #14 wire from controller to A/C and re-try/re-test.
In most cases this is the issue.
Dennis

ChuckS
04-28-2015, 01:05 AM
Thanks!

I'll give it a whirl if I can get a few minutes away from work. I'll post up what happens.

All work & no play.....

Dougflas
04-28-2015, 02:25 AM
you may also have a bad control head. There is a relay that gets bad solder connections on it. It will pass 12v on a digital meter but not a laod. Try using a 12v test light.

http://www.ebay.com/itm/2002-2006-DODGE-SPRINTER-Temperature-Heater-AC-Control-REPAIR-KIT-We-Install-/230749151497?hash=item35b9b8a109&vxp=mtr

ChuckS
04-30-2015, 03:28 AM
Dennis nailed it.

Although the wire "tested" OK per the book, running a jumper wire from the control head to the clutch worked. A new wire is in place, and my Sprinter is COLD!

Thanks!

Chuck

Tooth Fairy
04-30-2015, 09:16 AM
Dennis nailed it.



Dennis is the man when you have a problem with Sprinters thats for sure. :thumbup:

Jamescell
05-02-2015, 12:59 AM
I'm having an issue with my air too, clutch won't engage normally.. But if I unplug the sensor on the cylinder next to the battery it will turn on for 5-10 seconds then shut off. When I re plug that sensor in it turns back on for 5-10 seconds. What could that be caused by?


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obie
05-02-2015, 09:50 AM
If that's your pressure switch, it may not be allowing the clutch to engage due to low pressure. It's protecting the compressor. Have you put any gauges on the system?

Jamescell
05-02-2015, 12:26 PM
No I haven't, I don't have any tooling for a/c. I will see if I can rent some gauges from autozone :)


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lindenengineering
05-02-2015, 12:55 PM
Dennis nailed it.

Although the wire "tested" OK per the book, running a jumper wire from the control head to the clutch worked. A new wire is in place, and my Sprinter is COLD!

Thanks!

Chuck

https://www.youtube.com/watch?v=3YmMNpbFjp0
Dennis:thumbup::thumbup: