Can a landlord show up with the repairman without notice?

So the ac went out at my rent house and typically I just call a repair man after figuring out a time that works good for the tenant when they'll be home. This time I was like you know I better go over there when the technician shows up so I can pick his brain and make sure the ac is working good. It's easier to get his thoughts when you're both looking at it and Anyways, I told the tenant I might show up if possible to talk to the technician, but I won't go inside. She never texted me back saying that's fine or whatever, so then i'm like well i guess I better not go over there. Long story short I spent $400 for a simple capacitor replacement which is kind of a maintenance item every so often, but the bottom line is I have no idea if this older ac system is going to even last another month or 5 more years. Guess I'll just get a quote for a replacement system so I have an idea of the cost and put a new system in the next time it goes out, but in my opinion that's some bs isn't it how they ignored my request to come by?

Can a landlord show up with the repairman without notice?
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