tenant repair warranty

[Jestin Sorenson]

Hey guys, I bought a turnkey property with new appliances and my tenant tells me that the fridge is not working. It's not keeping things cold. I have a couple questions.

Can the tenant be liable for charges if there is nothing wrong with the refrigerator? If someone comes out to service it and there is nothing wrong, how could I work it so that the tenant gets the bill? If it's broken, then the warranty should cover it.

The appliances are under warranty but I didn't buy them. There are a bunch of Fridgidaire products, but the refrigerator is the one that isn't working. I've registered the products under my name, but I don't have a receipt. Is there a process or procedure for getting a receipt? Maybe I don't need one. The place was flipped before I bought it, so no one has lived in the house since. I didn't ask for a receipt when I bought it. I was thinking that I inherited the warranty when I purchased the house. 

Any thoughts on these would be much appreciated!!