We miraculously managed to get a good deal that we could blow all our savings on to get this new HVAC unit installed about a year ago. In the last few days, it's suddenly started producing a sour smell, particularly in my room. Looking up the issue, all I see is people saying to call someone to get it cleaned because it's mold and/or bacteria build-up. I changed the filter, but the one that was there was barely dirty at all, so I don't think that was much of a fix.
I can't go into detail, but there's a lot going on right now and we can't afford much. We barely even have time to organize fixing something like this. But I don't want to take risks with our health.
Can I get some advice please? What would y'all do?
*also my god the youtube algorithm-fueled thumbnails that come up when searching for tutorials on what to do about this are truly horrendous, look at this shit, just straight up embarrassing

legit I would call the guy that installed it to at least diagnose the problem and explain how it happened.
contractors can thrive or fall by word of mouth and something like that happening after just a year in a new install is not good.
Alright, I will give it a shot. I suppose it doesn't hurt to just ask.
yeah, you might have some warranty coverage or otherwise can at least ask the person what they think without moving to a quote
if you need to, you could put the screws to them as per above, but a friendly ask would be the first move