Can repair people enter without either landlord or tenant present?

[Jessica Young]

In Florida, is it legal for the AC company to enter and perform a system replacement without us (landlords) or tenants present, if we provide access via a neighbor who has a key? 

We are out of state and have a very difficult tenant who plays games about access times then complains if the repairs take longer. She usually ends up agreeing to a vendor access time, but she has now stopped replying to my scheduling notices. I already know her not allowing access is a lease violation, but I still need repairs made.