Hi I have a 2009 Astra 1.6 petrol twinport, I have owned the car for 3 months and ever since I bought the car the fan has been running constantlly once the coolant gets up to 100 degrees. In the last two days I'm having issues with power, the car accelerates as normal up to 4000 revs where it seems to just stop accelerating, and sounds much noisier. I got the car serviced today and the only thing that came up on the diagnostics was the thermostat. I was wondering if anyone had any thoughts as to whether the issues with fan, thermostat and power were related? I don't know whether it's relevant but the exterior temperature gauge doesn't work. I have booked the car in for a diagnostics on Friday with Vauxhall but would prefer not to fork out for £70 for info I already know. Thanks in advance. Joe.