Astra 2.0cdti dpf regen info?

[Boroboy]

Stigeye,
Full diagnostic done, including checking the thermo. Dpf saturation levels are good. No faults Found. Neither did the fan come on for them. However he did say it could be a faulty temperature sensor. Said for me to bring it back if it gets worse. Being intermittent, hardest fault to find. Said they don't think it's dpf related. Case of waiting to see if it becomes more frequent. One week it may come on twice straight after each other, once key took out of ingnition. Other times may just happen once a week or even once every two weeks. I've even had a week where it had come on around 4 times or so, after I've locked the car and walked away. Never usually for more than around 5 minutes.
Perhaps it wasn't trying to regenerate after all, more a temperature sensor fault. Time will tell, no doubt. I've never had the regen light appear on my dash, most my journeys are long.
Does your fan come on frequently after taking your ingnition key out? By frequently I mean around once a week.
Cheers.