HVAC in Nevada is a cooling emergency in the south and a heating emergency in the north. Southern condensers run for a very long season in full sun, with air handlers in attics that bake. Filters load with windblown dust. A system that is weak at four is a problem in a city that may still be hot at nine. Northern houses live on furnaces, boilers, or heat pumps that have to work on a Sierra or basin night, and cooling is a shorter complaint. Say which end of the state the thermostat is in.
If there is no cooling, say whether the outdoor unit is silent, humming and useless, or icing up. Ask what gets checked before a compressor is condemned: filter, airflow, capacitor, and the drain. Condensate clogs dump water into ceilings and imitate roof leaks. If there is no heat, say whether the furnace tries to start, and ask whether the heat exchanger, the flue, and the combustion air were part of the look. High-elevation northern towns do not breathe like sea-level towns. A replacement copied from the old nameplate can be the wrong fire.
Ask whether a replacement is a matched system sized for the house, and whether the ducts are being sealed or ignored. Southern ducts in a hot attic leak away the only thing the house needs. Northern ducts and old boilers in basements have their own leaks and their own venting. Evaporative coolers still exist on some older dry houses and are not the same machine as a refrigerant system. Say what is on the pad or the roof.
Maintenance in the south belongs before the long hot stretch. Maintenance in the north belongs before the first hard freeze. If the house is already unsafe to sit in, skip the calendar. Name the town and the symptom. Call the number on this page.