Another issue you need to be aware of that I had to stomach with a Peugeot is there is sometimes a condition applied with electronic components that once fitted, they cannot be returned.
I'm very sorry to hear this. ESR has been a major part of this forum and you will all be sadly missed. Good luck for the future in whatever you decide to do.
As Martin said its a common fault and is caused by the CDs condensating and the laser not being powerful enough to read through it.
You have 3 options:
1. Keep you CDs in the house overnight.
2. Don't play them until the car warms up
3. Change the headunit for a better one.