Appliance warranties intentionally invalidated by tenants

[Sara Valentine]

I have a 5 year Lowe's warranties on my appliances in a nice 3 bed/21/2 bath duplex unit in a very nice neighborhood. Last Wednesday  evening my tenant said the dryer was overheating. I told him it was under warranty and I would have my warranty service come out and do a full checkup. I called warranty service the next morning as soon as they opened  and made an appointment for Monday.  Tenant was impatient, and wanted to calll someone who could come right away  - I specifically asked (in writing) my tenant NOT to call another service because my warranty would be invalidated if he did, tand he agreed (in writeing - this was a text thread). The repair service person did not show up Monday - so I told the tenant I was rescheduling for Tuesday. He completely ignored my request and had a freelancer service person come out. Probably uninsured, exposing me to liability. Are there any consequences for him ignoring my written request and invalidating the 5 year warranty I had paid for that still had 2 years remaining? Also received a lot of verbal abuse about the +++++ing appliances, my ++++y repair service options, and the incompetence of my homebuilder who tenant says had installed the dryer incorrectly (installed by Lowes, because they won't warranty if anyone other than a professional  they contract with does the installation. Tenant also berated me for my 'inability to get the job done'... I have owned rental properties for years, but am new to managing them myself.  So I want this to be a learning experience.  THANKS SO MUCH in advance for any advice going forward with this.