I contacted airconditioning repair people who came out, had a look at the evap cooling for 5-10 mins, and said the main PCB board needed replacing.
I then contacted someone who does repairs (over the phone, he didn't charge me) who advised me to try re-pairing the remote. That took a whole 5 minutes and it ended up working again. The tradie even sent me a pic of the PCB board with no lights saying it just wasn't working. He then gave me a quote to replace it and a $200 invoice for that callout.
What would you do in this situation?
Thanks
Edit: Thanks everyone for your input, it's been a fun and surprising discussion. I will call the guys and see what they have to say and take it from there. If paying $200 gives me the right to leave a review, maybe I'd rather do that.
Paying someone for wrong diagnosis is tricky.
At the same time, what did the person who suggested (or fixed) the remote charge you?