Original post by: Antony della Porta ,
Hi I had the same issue and after exhaustive tests by me I managed to get Apple to agree that the MBP had a faulty SMC which is an inherant problem with a range of built MBPs. Mine is a late 2013 Retina 15”. If yours is around the same period you can get Apple to check. In the UK we have a 6 year warranty cover so if yours is late 2014 and still same issue then you are covered.