Tenant issues are frustrating me.

[Mike Young]

I lived in a unit while I rehabbed it. Electric stove/oven was not new but in good working order. Tenants in two weeks and say oven is not working. I sent out a repairman who checked burners, oven and broiler and all work fine. He said tenant was embarrassed because he didn't know how to use the oven. (two knobs... one to choose oven or broiler and the other to set temperature) 

I was charged $50 for the service visit and I sent it to the property manager to have the tenant pay.

The next day the tenant calls and says the oven burned the top of their food and obviously the oven does not work correctly. Property manager suggests I should just replace the stove or let the tenant replace it at his cost (and take it when they move) and get rid of our old stove.

Am I being petty thinking that I shouldn't be out of pocket for the service call and lose our working stove?