It has one furnace and one thermostat in the down unit that controls the temperature for the entire house-both units.

The dog or 4 year old chewing on the porch rails, window sills, stair rails and claiming 'peeling paint' which can not be painted outside until the temperature comes up. 

please set the gauge to your desired temperature ".

Depending on the temperature, A/C IS considered an emergency here in Florida.

I keep the AC at 76 during the day I believe, and around 72 overnight.2) Some of the newer smart thermostats (e.g. the Nest) have the ability to set a pin that is required to adjust the temperature.

He did most of his own maintenance and he said dealing with the boiler was a pain in the rear - from not only maintenance but constant calls from tenants unhappy with the water temperature. 

Here are the various problems: others have mentioned the ability to control the temperature and access the electrical panel 24/7 (those items just make sense).

Temperatures this past winter caused the pipes to burst resulting to water bill around $1,500.

Make sure he/she checks the following:1 - Furnace makes a "coughing noise"2 - Temperature in the house seems to be "feverishly" higher than it should be3 - The furnace fan doesn't seem to be moving/replacing the inside air as well as it should so the house doesn't seem to be "breathing" like it should. 

In a great and perfect world your A/C would be zoned so you can set the temperatures for each floor, the norm however is that the thermostat is downstairs so the A/C turns off before it cools the upstairs.