I'd have a google for temperature sensor software suitable for your machine and keep and eye on temps, fan speed and cpu usage to see if it looks right or wrong or if there's a pattern.
They may have also bump the fan or installed a louder fan or done any number of things to a fan in the machine during servicing which has made it louder. Maybe they removed some insulation.. or took out the dead rat that was blocking the vent or..
I'd have a google for temperature sensor software suitable for your machine and keep and eye on temps, fan speed and cpu usage to see if it looks right or wrong or if there's a pattern.
They may have also bump the fan or installed a louder fan or done any number of things to a fan in the machine during servicing which has made it louder. Maybe they removed some insulation.. or took out the dead rat that was blocking the vent or..