I recently installed a GROM audio unit in place of our CD changer on the 04 XC90, premium audio. Works great and I had done the same upgrade on our 05 previously with no issues but, after this one, the A/C is no longer cold and I can see that the compressor won't even try to engage. Is this more likely coincidence or are the systems possibly linked together and need programming?

For reference, A/C was previously very cold and never had an issue. It seems oddly timed that it suddenly failed. I've unplugged the battery overnight to no avail. I've considered hooking the CD changer back up without the Grom to see if there is any change. Thanks for any advice.