Global Green Solutions Team

What size AC do I need? Not square feet alone: a Manual J load calculation weighs insulation, windows, sun and climate. Call 310-507-7172.

AC making noise? Squealing points to a belt or motor, banging to a loose part, buzzing to electrical trouble. When to call. Call 310-507-7172.

How often to change your AC filter: check it monthly and replace it at least every three months, sooner with pets, dust or smoke. Call 310-507-7172.

Lower AC energy bills with a clean filter, clean coils, the right refrigerant charge and smart thermostat settings. Call 310-507-7172.

AC blowing warm air? Check the thermostat, filter and breaker first; low refrigerant, a dirty coil or a failed capacitor need a pro. Call 310-507-7172.

Is annual AC maintenance worth it? A yearly tune-up keeps efficiency up, catches worn parts early and protects comfort. Call 310-507-7172.

Furnace maintenance tips: change the filter, keep vents and the area around the furnace clear, test the CO alarm and book a fall tune-up.

Common furnace problems: no heat, short cycling, a burner that won't light, noises and a yellow flame. The warning signs and when to call.

When to schedule an HVAC inspection: every spring and fall, before buying a home, and whenever you notice noises, odors, weak airflow or higher bills.

Mini split installation cost depends on how many indoor heads, the capacity, line set length, electrical work and wall or ceiling units. Options explained.

Why does my AC smell? Musty means moisture or mold, burning points to electrical parts, rotten eggs means leave and call the gas company. What to do.

AC maintenance checklist: coils, refrigerant, capacitors, relays, drain and airflow, what a technician checks on a tune-up in Woodland Hills, CA.