Appliances - What is Landlord's Responsibility to Repair/Replace?

[Deanna Boss]

I have a duplex that has long term tenants in the upper unit and the lower unit has been short term rental (Airbnb). I have a long term tenant moving into the lower unit now. There are two washers and two dryers in the basement, however only one set has ever worked. I didn't give the short term guests access to laundry so it wasn't a big deal but now that there are regular tenants moving in the upper tenants asked when I plan to repair/replace the other two machines. I guess my plan was to not replace them! There is nothing in the lease that I can find that would require me to do it. I pay for water and they aren't coin-op machines. Am I being stingy or is it reasonable that there is one working washer and dryer that all tenants have access to for free? Oh! And the upper tenants' lease is up 9/30/18 and they already told me they are moving out of state. Thanks for your valuable input.