My question involves landlord-tenant law in the State of: Florida, in a 55+ community

i am renting out a unit in Delray Beach. Tenant moved in effective May 1. On June 9, tenant's daughter emailed me that their electricity bill from FPL was very high, that FPL saw a spike in metering on May 12th. I suggested she have FPL come check, she said they told her they checked the meter via computer, and just told her of a spike in the usage. She told me "i will see what happens next month and let you know"

Last week, June 12th, she told me that the bill was $680 for May, and that FPL was coming out on June 18th to check what is happening.

Yesterday, she called me and told me that FPL found that the water heater in the unit was stuck in heat mode, and that it was discharging hot water out of the pressure release valve, out the side of the house. The heater was drawing the correct current, but since it was stuck in "on" mode, the electricity usage was extremely high. I had the heater checked and replaced.

now she is saying that she wants to figure out about the bill. the electricity bill is about $1000 now, $680 for May, and the rest is MTD accrued usage for June.

i checked the lease. the tenant is responsible for electrical and water bills. however, this is an extreme case, where the high bill was due to the water heater becoming broken during tenancy, but in the unit owned by me. i dont know what happened between may 1 - may 12th. the unit sat unoccupied for a year so these issues werent obvious to me. in limited usage (contractors working at the unit), there was hot water, and the elec bill was no more than $40/mo

if the spike was from May 12, and she only saw the high elec usage on the bill on June 9th, thats nearly a month of the water gushing - how is that not noticed? she then said "i will let u know what happens next month".... so, there wasnt really much urgency until there was a dollar figure attached. am i responsible for her bill? is she? is there partial responsibility?