Ac altise making loud rattling noise when the air ducting is connected

When the ducting is connected, it makes a loud rattling noise which might be coming from the fan.

Model: Andi MPK1-12ER
Hi- One of my colleagues recommended your great work. I have got my portable...

Regas a Delonghi PAC T120 Eco unit
Unit works great but doesn't seem to have the same level of cool it once did....

Polo cool portable aircon repair - possible compressor issue
Air con will start up but compressor struggles to turn over. Works in fan...