Air conditioners in tenants apt

[Rosalie DiPietro]

I have a good tenant in my two family rental in Astoria queens Ny 

the air conditioning unit which is in a wall sleeve has stopped working    the air conditioner was left by a previous tenant however the  current tenant is under the assumption that  it is my responsibility now to repair or replace it 

I politely told him no

they’ve been there for 2 years without any increase for $2300 a month which includes a parking space valued between 150/ $200 month, includes Heat and cooking gas …a $40-50 mo savings for them 

comparable Apts listed for $2995/mo, plus utilities  and $150/200 mo for parking

Any advice on how to handle?