Letting the support team know what you�ve already done will help them save time, and also make a more accurate diagnosis of what�s wrong.

If they are asking about an emotional support animal, then they have been diagnosed with a mental condition by a licensed psychologist or psychiatrist...from your state, and can supply the appropriate letter of diagnosis. 

If my maintenance person's diagnosis was as described I would replace ASAP.

Then the diagnosis, which is another $100.

When in doubt always get a second quote/diagnosis. 

Although, this markup for a diagnosis seems downright crazy.I'd definitely raise a stink with my PM about the cost. 

That’s an easy diagnosis.

Another thing I'd really like to see in a PM co is service call double-check or further diagnosis. 

@Gabriel Benavidez Get a licensed electrician in to do a proper diagnosis and get you a quote for repairs.Then use that quote to negotiate the price down - and watch your due diligence timeline. 

Diagnosis was that the compressor was gone, in the condensing unit.