He can raise it so the tenants don’t crank it down to 60. but instead 70,72 etc. another issue could be the unit is low on refrigerant. this can happen overtime, even if it’s a few ounces over 20 years or all of it in a week. coils can ice up restricting airflow, though the air is cold, so the tenant may think operation is normal. if the condenser is matted up with dirt and gunk, this will also effect coolingmake sure to use fiberglass filters, and have the tenants change them once a month. hope this helps, don’t hesitate to connect with more questions!

In fact, we install fiberglass doors and not steel, they hold up better. 

The roofs heat up to 140 Degrees and we fill them with fiberglass insulation in order to run our Air Conditioning units.

If you see big patches of plastic covered fiberglass insulation hanging down, you could have rodent/racoon/possum infestation depending on your location. 

Instead of a fiberglass tub / shower surround, I went with an oversize white subway tile, with a "ripple" texture.

Alternate options considered:1. cut the fiberglass bathtub from the bathroom upstairs to access copper pipes - need to get someone for cutting a hole through fiber glass and fixing it back up after the copper pipes are replaced.2. cut the drywall in the bedroom upstairs adjacent to the bathroom - the bathtub and copper pipes are deep inside might still make it harder for plumber to access3. pull out the master tub, remodel and rebuild the bathroom upstairs. 

We have repaired fiberglass tubs and have it last a few years, then you do it again.

They are waterproof, fiberglass panels that are easily cut and glued up.

Our contractor for the straight bars started using fiberglass versus steel rods.

A good drywall repairman is a valuable member of the turn team.Also there is a prime-ing and painting to do, swapping out brass fixtures for silver colored ones, and a biggie--door replacements for kicked interior doors.Changing front door locks, changing interior door handles, knowing how to true up the locks to the lock plates so they work like hot butter.Knowing how to repair a broken screen, knowing how to change water hoses on a washing machine, every year.Being able to give a front door a smooth paint job with no brush streaks, steel, wood, fiberglass and antique doors with varnish on them.If you and your customer both have an iphone you can use facetime (free video chat) to connect real time, and the customer can see what you see as well as hear you.