Dr. Prepare 3L Dehumidifiers for Home, 2 Working Modes

I’ve had this for approx 6 weeks. It’s was fabulous at drying laundry for 5 weeks but has started to make an angry wasp sound every now and then which I am a bit scared to leave it on unattended incase there’s now a fault. I have been using it daily for approx 4 hrs each day. So maybe this is not intended for that kind of labour, who knows. BUT it does a mighty job at drying laundry, especially that it heats the room with warm air whilst doing so.
I am just VERY Worried it might short-out because of the noise it has started to make in the last 3 days. I have contacted the manufacturers in China as I’d like a replacement. I actually hope it’s just my machine at fault because it’s been my best dehumidifier yet until recent funny noise (I have 3 dotted around my home)

very easy to set-up with a clear booklet of instructions included. There is no humidistat display or settings to switch off when a certain humidity has been reached but this is a budget machine and seems well built. There is a smell when first using the machine which fades after a few hours of use but still is noticeable to me each time I start it up. I collected a container of water over about 4 nights of use in a bedroom and have a home built sensor that shows me the humidity dropping from 80% to 70% after about 40 mins of use and this is enough to reduce condensation on the inside of my bedroom window during the night and thus reduce mould in the longer term. After a weeks usage there is a bit of an additional periodic background noise that probably coincides with the internal drum being rotated or possibly a fan bearing so we’ll see after longer usage what happens. Overall it seems good value although having an humidistat setting/display would be better.