Noisy Microwave (Highpoint) fan

We've only used our Highpoint microwave a couple of times. The exhaust fan is very noisy; not just the noise of air moving but a rattling noise that is loud and annoying. Any suggestions? The microwave oven itself seems to work fine, it'a the vent fan that is noisy.

I am not familiar with the HIghPoint brand. Is this another cheapie appliance that I'm going to end up replacing? You'd think for the amount of money we pay for these coaches that they would use quality appliances. We also have some off brand TV in the bedroom while the living room has a very nice Samsung TV.

You should talk to Heartland customer service about it. Mine was making a strange arcing noise. I called them about it and they sent me a new replacement. The new one works fine (and fairly quietly).