I know you can get insurance after the trustee sale but it wouldn't cover any title defects that existed at the time of sale...not sure what it does cover.

Until you diagnose the problem, you won't know if it is malfunctioning because of damage the tenant caused or if it is defective or worn out. 

They are actions for the purpose of clearing a particular, known claim, title defect, or perceived defect.

Maybe it was defective and would be covered by warranty.

Generally I find correcting electrical defects is the most time consuming part of my turnovers.

In those states where properties are auctioned for defaulted taxes, there can be defects that interfere with your ability to receive clear title.

For example, my lease states "Tenant shall be charged for repair of drain blockages or stoppages, unless caused by defective plumbing parts or tree roots invading sewer lines."

Roy, I was researching late fees a couple of months backs and reading something important to keep in mind in California: An attorney was pointing out that if your tenant ever disputes in court that your late fees were not "reasonable" during your UD hearing, and that these fees were more of a penalty, the judge could order these fees to be refunded to your tenant, making your 3-day notice "defective" hence dismissing your UD. ...

The only defect I could imagine dramatically affecting electric heating would be poor air circulation.

My local PHA uses the following list to prep landlords for the general expectation of the inspection: Windows and Doors The windows must not be damaged or missingAll ground floor windows must have locksAll doors leading outside must have locks and deadboltsFlooring, Ceilings and Walls The flooring, walls and ceilings must not have any serious defects such as serious bulging, sagging, large cracks, loose surface or other major damagesThe flooring must not have any serious damages and cracks that will cause someone to trip and fall (peeling/lifting linoleum is often what flunks on this point)The ceiling and roof must not leak.