I’ve got a hotpoint Aqualtis AQM8F 49U washer dryer. Recently there’s been a burning smell when using the tumble dryer setting. The wash cycles have been fine. I dismantled the dryer heater element thinking it may be a buildup of fluff. There was some but I suspect the fan motor is faulty as it didn’t run when powered directly. I ordered a new fan motor and reassembled the machine only to find that it now displays error code F15 when I try to use a wash only cycle. Depending on where you look this code gives several different possibilities. Any suggestions on what to try gratefully received!