I've 2007 XC90 and experience very strange problem. This problem happens to me two times. The 1st time in February '07 when I took my new car from the dealership:-) and 2nd time now, October.
The problem description: All AC control buttons including air flow are frozen. This means whenI press anyAC buttons or even try to change Fan speed they are not responsive. When I stopped the car, remove a key and insert key again and start the car the problem goes away. In other words when I "reset" the car everything works normal.
Of course I couldn't prove anything to the dealership. They justwere not be able to reproduce the problem.

If somebody else experiences the same problem with this vehicle?

 

I am assuming you have the 3.2 I6 this is a common problem. They may not be aware of this yet. Take it back and have them perform a ccm upgrade. If they dont know about it here it is

Copyright © 2007 Volvo Cars of North America, LLC. All rights reserved. Page 1 of 1

NO 87-57

DATE: 09-19-2007

MODEL: XC90 equipped with SI6 (engine code 98)

CHASSIS 328000 - 440138

MODEL YEAR 2007- 2008

SUBJECT:

REFERENCE: VIDA

DESCRIPTION:

Intermittently, The CCM (Climate Control Module) may not function after engine start. No

DTCs are posted.

This may happen due to a fault in the signal communication from the ECM (Engine Control

Module) during the ignition key handling at start-up. The CCM will function again after the

ignition key is taken out and re-inserted after 10 seconds. To prevent this symptom from

occurring, an improved ECM SW has been developed. Only SI6 engines are affected.

SERVICE

If the vehicle is within the chassis limitations above, perform an ECM upgrade P/N 30677021)

as part of the CPS (customer preparation service) or if there is a documented customer

complaint during the warranty period.

Note:

error 134 for the ECM

necessary.

WARRANTY CLAIM INFORMATION

LABOR OP LABOR DESCRIPTION LABOR TIME

36004-2 Software control module downloading 0.3hr

Claims may be submitted under the new car warranty when there is a documented customer complaint using claim type: 01

VOLVO

Volvo Cars of North America, LLC

Technical Service

Please circulate, read and initial: _____Svc Mgr _____ Parts Mgr _____Shop Foreman

_____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ TECHS

_____ Warranty Administrator _____ _____ _____ _____ _____ _____ _____ S. Advisors

Tech-

“Fixed Right – First Time�

Volvo Technicians, Service and Parts Managers

 

Thanks a lot!!! I do have 3.2 I6 engine andyour postexactly describes my problem.