Frequently Asked Questions
Get answers to your HVAC questions from the experts
Have questions about your heating, cooling, or indoor air quality? Browse our comprehensive FAQ sections below. If you can not find the answer you are looking for, do not hesitate to call us at (650) 360-9230.
Air Conditioning FAQs
Common questions about air conditioning repair, maintenance, and installation.
Heating & Furnace FAQs
Common questions about furnaces, heating systems, and winter comfort.
Heat Pump FAQs
Common questions about heat pump systems, efficiency, and maintenance.
Mini-Split & Ductless FAQs
Common questions about ductless mini-split systems.
HVAC Maintenance FAQs
Questions about preventive maintenance and system care.
Indoor Air Quality FAQs
Questions about air quality, filtration, and healthy indoor air.
Most Popular Questions
Why is my AC blowing warm air?
Warm air from your AC usually indicates low refrigerant, a dirty filter, a frozen evaporator coil, or thermostat issues. Start by checking your filter and thermostat settings. If the problem persists, call a professional to diagnose the issue.
How often should I change my AC filter?
Most filters should be changed every 1-3 months. During heavy use (summer), check monthly. Homes with pets, allergies, or high dust may need more frequent changes.
Why is my furnace blowing cold air?
Cold air from your furnace may indicate a dirty filter, pilot light issues, thermostat problems, or a failing ignition system. Check your filter and thermostat first. If the problem continues, call for service.
How often should my furnace be serviced?
We recommend annual furnace maintenance, ideally in fall before heating season. Regular service ensures safe operation and can prevent breakdowns.
How does a heat pump work?
Heat pumps move heat rather than generating it. In summer, they work like an AC, moving heat outside. In winter, they reverse and extract heat from outdoor air to warm your home.
Do heat pumps work in cold weather?
Yes! Modern heat pumps work efficiently down to 25-30°F. Cold-climate models (like Mitsubishi H2i) provide full heating capacity even at sub-zero temperatures.
What is a mini-split system?
A mini-split is a ductless heating and cooling system with an outdoor unit connected to one or more indoor units. They provide efficient zone control without requiring ductwork.
How efficient are mini-splits?
Mini-splits are very efficient, with SEER ratings up to 30. Because they eliminate duct losses (which can be 20-30%), they are often more efficient than central systems.
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