Homeowner HVAC Resources & FAQ
Frequently Asked Questions
How often should I replace my air filter?
Change standard 1-inch filters every 1 to 3 months, especially during heavy summer or winter usage.
Why is my AC running but not cooling my home?
Common causes include dirty filters, frozen evaporator coils, low refrigerant, or outdoor condenser debris.
How long does a typical furnace or air conditioner last?
Most central HVAC systems last 12 to 15 years with regular preventive maintenance.
Should I repair or replace my heating and cooling system?
If repairs cost over half the price of a new system or it's over 15 years old, replacing is often more cost-effective.
What is included in a seasonal HVAC tune-up?
We clean components, check refrigerant, inspect electrical connections, verify safety switches, and test thermostat accuracy.
Do you offer emergency or after-hours HVAC repair?
Yes, we offer after-hours and weekend services across St. Louis and Florissant for urgent cooling or heating needs.
Can a smart thermostat really lower my energy bills?
Yes, smart thermostats optimize cooling and heating schedules, cutting utility costs by up to 10–12%.
What are the benefits of a whole-home UV light purifier?
UV germicidal lights kill mold spores, bacteria, and allergens inside your ductwork before air circulates.
Do you service commercial properties?
We provide light commercial HVAC services for small offices and shops up to 7.5-ton capacity.
Are you licensed and insured?
Yes, TwoBros Heating & Cooling is fully licensed and insured across Missouri.