Hi bill, tested ac - ok. Test temp sensor and fan control module - ok. Sent engine ecu for test - no fault. Checked continuity of signal wire from ecu to control module- good. Surmised that after all tests that the fault must be in the engine ecu that didn't show up on bench test. Replaced ecu and carried out updates - now fan working correctly.
You're quick to jump to a conclusion and say that he misdiagnosed the problem, you were not there and have no clue. Please keep your "I know more than you" attitude to yourself.