In September 2015 we had our Bathroom re-fitted out to make it a wet room and an Extractor Fan was fitted (make is Enviro-vent). This thing has a mind of it's own ! It should be on a quiet constant tick over and was to begin with. In the colder months, ie Nov, Dec etc it started to make more noise - and I mean loud ! It could be heard through the closed Bathroom and Bedroom doors and it was going on for HOURS! if we had a late shower, say 9 - 10pm this thing was still going at 3am ! So this year we have decided to take our 'winter' showers during the day, deliberately avoiding night times (unless unavoidable) to give this fan lots of time to 'shut up' ! Yesterday I had a shower at 7pm and the Extractor was going right up until the early hours of today. At one point it quietened down but then started up again. I always have the Bathroom window open, but have sometimes closed it to see if containing the steam/wet would make the Extractor more efficient and run quieter. I have tried pulling the cord for the 'faster' setting, leaving this on for a few minutes then pulling it again in the hope it will 're-set' itself to the 'quiet' mode. The guartantee for the works done is now over a year old, and short of finding a shotgun and giving this ****ing thing both barrels I am at a loss what to do. Could the Extractor seen in the attached photo be changed easily to attach to the rest of the system which is in the loft or would it mean the whole lot would have to be changed? Many thanks any suggestions