San Dimas residents depend on reliable HVAC service to stay comfortable through hot summers and mild winters. Sinclair Air Systems, a family-owned HVAC contractor serving the San Gabriel Valley since 1980, brings four decades of expertise and honest service to San Dimas homeowners and businesses.
Based in nearby Covina at 721 E San Bernardino Rd, we understand San Dimas’ diverse neighborhoods—from the foothill properties near San Dimas Canyon Park to the established residential areas near downtown.
AC Repair & Emergency Service — San Dimas summers bring intense heat, and when your air conditioning fails, you need fast professional help. Our technicians diagnose problems quickly and complete most repairs the same day.
Air Conditioner Installation — For homeowners ready to upgrade from aging or inefficient AC systems, we handle everything from unit selection through professional installation.
Furnace Installation & Maintenance — Though San Dimas winters are mild, furnace availability matters during cooler months. We install and service furnace systems designed for reliable heating.
Mini Split Systems — Our mini split system installations are perfect for San Dimas properties, especially homes with additions or high-sun-exposure rooms.
Commercial HVAC Solutions — San Dimas businesses need reliable climate control. We serve commercial properties with installation, repair, and maintenance services.
Intense Summer Cooling Demands — San Dimas experiences some of the San Gabriel Valley’s hottest temperatures. Summer cooling demands stress AC systems constantly from June through September.
Foothill Property Challenges — Many San Dimas homes sit on slopes or hillside properties with elevation changes that require custom HVAC solutions.
Seasonal Dust and Debris — Proximity to natural areas means homes accumulate seasonal dust and pollen. Air filters clog faster, requiring more frequent changes.
Sinclair Air Systems serves all of San Dimas, including the neighborhoods near downtown San Dimas, Via Verde, Horsethief Canyon, San Dimas Canyon, and the communities along Bonita Avenue, Arrow Highway, and Lone Hill Avenue. We also cover the areas near Raging Waters, Frank G. Bonelli Regional Park, and the 57 and 210 Freeway corridors. Our Covina shop is just a quick drive from San Dimas, so we can respond quickly for emergency calls.
Most AC repairs in San Dimas range from $150 to $1,200 depending on the type of repair needed. Simple component replacements like capacitors or contactors are on the lower end, while more involved repairs like compressor replacement or refrigerant leak repair cost more. We always provide a free estimate up front so there are no surprises.
We recommend annual AC maintenance each spring before the hot season, and a furnace check each fall. Given San Dimas’s extreme summer heat, keeping your AC properly maintained is critical for preventing breakdowns. Our $89 tune-up includes a thorough inspection, cleaning, and performance optimization.
If your system is more than 15 years old, uses the phased-out R-22 refrigerant, needs repairs multiple times a year, or your energy bills keep rising, replacement is usually the better investment. We’ll always give you an honest evaluation and recommend a repair when that makes more sense.
Yes. When your AC fails during a San Dimas heat wave, we offer same-day emergency service. Our trucks carry the most common replacement parts so we can often complete repairs in a single visit. Call (626) 331-4541 for quick assistance.
We service and install all major HVAC brands including Carrier, Lennox, Trane, Rheem, Goodman, Daikin, and Mitsubishi. Whatever system is in your San Dimas home, our experienced technicians can handle it.
Yes, we offer flexible financing plans so San Dimas homeowners can upgrade their heating and cooling without a large upfront payment. We also help you take advantage of utility rebates and federal tax credits for energy-efficient equipment.
Don’t wait for a complete breakdown. Call Sinclair Air Systems at (626) 331-4541 or request service online. We’ll get your heating and cooling system running efficiently again.
Sinclair Air Systems proudly serves homeowners and businesses throughout the San Gabriel Valley. Visit our service area pages:
Contact Sinclair Air Systems today for a free estimate. Family-owned, serving the San Gabriel Valley since 1980.