Honest answers to the questions we hear most — no jargon, no upsell, just straight talk from a family that's been in the HVAC business since 1967.
Give us a call at (209) 598-8889 — we're happy to answer anything, even if you're not ready to schedule yet. That's just how we do things.
We recommend twice a year — once in the spring before cooling season and once in the fall before heating season. Regular tune-ups extend system life, improve efficiency, and catch small problems before they become expensive breakdowns. Think of it like an oil change for your car.
Most standard 1-inch filters should be replaced every 1–3 months. Thicker media filters (4–5 inch) can last 6–12 months. The honest rule: check your filter monthly. If it looks gray and dirty, replace it. A dirty filter is the #1 cause of HVAC problems we see — and it's 100% preventable.
Our pre-summer tune-up includes inspecting and cleaning coils, checking refrigerant levels, testing capacitors and contactors, lubricating moving parts, checking electrical connections, testing thermostat calibration, clearing the condensate drain, and inspecting the blower. Our pre-winter tune-up focuses on the heat exchanger, burners, ignition, gas connections, flue and venting, safety controls, and heating components. See our full Maintenance Plans page for complete checklists.
Common causes include a dirty air filter (check this first — it's free), low refrigerant due to a leak, a frozen evaporator coil, a faulty capacitor, or a dirty condenser coil. Some you can check yourself, but most require a professional diagnosis. Call us at (209) 598-8889 and we'll find the real problem — not invent a new one.
If your AC is running constantly but can't keep up, common culprits are low refrigerant, a dirty filter or coil, duct leaks losing conditioned air, or a system that's undersized for your home. In extreme heat, even a well-functioning system may struggle — but if it's happening on a normal day, call us for a diagnosis.
High summer energy bills are often caused by a system working harder than it should due to low refrigerant, a dirty coil, or duct leaks. Poor attic insulation and an older, inefficient system can also be major factors. A tune-up and duct inspection can often make a real difference — and we'll tell you honestly if a replacement would save you money.
A well-maintained central air conditioner typically lasts 15–20 years. If yours is over 15 years old and needs a significant repair, we'll give you an honest assessment of whether repair or replacement is the smarter financial decision — and we won't push you toward a new system if repair makes more sense.
If your furnace is blowing cold air, common causes include a tripped limit switch, a dirty filter restricting airflow, an ignition or pilot failure, or a thermostat issue. A heat pump blowing cold air in very low temperatures may be in defrost mode — that's normal — but if it persists, have it checked.
A gas furnace can last 20–30 years with proper maintenance. If you're having frequent repairs on an older furnace, the money might be better spent on a new, more efficient system. We'll walk you through the math honestly — no pressure.
A heat pump handles both heating and cooling in one system — it moves heat rather than generating it, which makes it very energy-efficient. They're an excellent choice for California's climate, especially if you're replacing an older system. We install and service all types of heat pumps and can give you a straight comparison against a traditional system for your home.
Yes. West Coast HVAC Inc. holds California Contractors State License Board (CSLB) License #952030 and is fully insured. Dan Parker and his father Ted both completed the Sheet Metal Workers Union apprenticeship program — one of the most rigorous training pathways in the trade. That standard of excellence is the foundation of how we operate.
We serve western Calaveras County and eastern San Joaquin County, including Valley Springs, San Andreas, Mokelumne Hill, Jackson, Stockton, Lodi, Manteca, Galt, Rancho Calaveras, Burson, and surrounding communities. Not sure if you're in our area? Call us — we're happy to help.
Yes — we offer free estimates on equipment replacements (new AC systems, furnaces, heat pumps). Diagnostic service calls for repairs are a standard service fee, which we disclose upfront before any work begins. No surprises.
We primarily install Goodman, Bryant, and York equipment, and service all major brands including Carrier, Lennox, Trane, Rheem, Amana, and others. If you have a system, we can service it.
Yes — Spanish-speaking technicians are available upon request. Just let us know when you call or book online and we'll make sure the right technician handles your appointment. Se habla español.
Ted Parker founded a family HVAC business in San Jose, California in 1967. His son Dan Parker — who began working in the trade at age 8 — graduated at the top of his Sheet Metal Workers Union apprenticeship and opened his own company in San Jose in 1989, specializing in architectural sheet metal. Dan took over Ted's business in 1993 and relocated to Valley Springs in 2002, establishing West Coast Air Conditioning. Today, Dan's stepson Alex Banegas serves as partner and General Manager in Training. Three generations, 57+ years of honest service.