2009 VW CC Cooling Fan Faults: P1950, P1945, P1951, P1948, and P2015 Diagnosis & Repair Guide

I recently had my 2009 Volkswagen CC (2.0L Turbo) serviced at a dealership last Wednesday for an intake manifold replacement. In addition to replacing the battery—necessary due to starting issues and power loss—they informed me that the cooling fans needed replacement, with a quoted cost of $963 plus tax. I noticed the fan was running more frequently than usual, but the technician initially told me this was normal during hot weather. However, on Sunday after returning home, one of the cooling fans continued to run for hours even after turning off the car. The dealership's service report lists fault codes P2015 and several cooling fan-related errors (P1950, P1945, P1951, P1948), stating that the fans were found to have internal open circuits during testing. I don- t fully understand what this means. Since then, I've left my vehicle parked in the driveway for two days and disconnected the battery to prevent the fan from running continuously after shutdown. I'm seeking clarification on what exactly needs to be repaired—should I replace the fans, or is there a more targeted component (like a fan relay, switch, or control module) that should be diagnosed first? Any guidance on interpreting these specific fault codes for my 2009 VW CC would be greatly appreciated.