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. 

[Chris Davidson]

Quote from @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. 

 What does your lease say? If the tenant hasn't given permission and you haven't provided the notice required notice according to the lease I wouldn't allow access. However if you have provided the required notice you should be fine. 

However why does a neighbor have the key? Without knowing the neighbor and your relationship to them this could open up some unique liability.