Help diagnosing AC problem (8 Viewers)

[s445203]

My stepdad's 2007 200 series has a problem with the air conditioning.

Symptom:
AC tries to engage, the engine idle revs rise a bit higher for maybe 2-4 seconds and then it sounds like the AC disengages and the revs go back down to idle.
The screen says Climate control unit error (or something similar) at the top intermittently
While the blowers work, there is no cooling happening.

Investigations I've done:
I took it to a guy to charge the system up as that was my first guess. He put the machine on, but the coolant pressure was fine, so it has coolant in it.
I then found a video on how to read the error codes - it says code 42, which is inlet servo motor fault. Clearing the code makes it re-appear instantly.

My diagnosis is that if the engine revs are rising, the clutch is working fine and if the engine is straining when I know the system is full of coolant, I am ruling out a compressor issue.

So I'm down to either a wiring fault between the AC amplifier and the servo motor, or a servo motor fault.

Does anyone disagree? I can't find any videos on how to change this motor though - is it a big job that needs the whole dash taking out or is it fairly straighforward?

I'm also wondering whether pulling the AC fuses might do anything or whether it's a waste of time?

Thanks in advance for any help/thoughts.

 

[bloc]

Could be the very common recirculate flap linkage broken. Note that since this thread was posted a user here has offered a 3D printed product that easily fixes it.

Thread 'Cabin Filter Change and the Recirculation Flap Issues FIXED'

Oct 30, 2017

Been lurking here for some time now, but I figured it was finally time to contribute to the knowledge base.

I picked up a cherry 2008 200 Series a couple months ago and have been baselining it ever since. This past weekend the cabin filter was on my list, but I wasn't expecting it to be as challenging as it turned out.

As most probably know, the cabin filter is located in the glove box, and the HVAC system needs to be set to recirculate in order to remove and install the filter. Failure to set the system to recirculate keeps the accordion looking flap covering the filter and blocking...

• ttrmike
• Replies: 175
• Forum: 200-Series Cruisers

• 

 

[Sandroad]

There are servo location diagrams, as well as R&R procedures in this TSB, if that helps.

https://static.nhtsa.gov/odi/tsbs/2021/MC-10187278-9999.pdf