HVAC Service Areas in Southern California
Heating and air conditioning service across Los Angeles, Orange, and San Bernardino Counties, from our base in West Covina.
Where We Work
Trust Heating and Air Conditioning is based in West Covina, in the San Gabriel Valley, and provides residential and commercial HVAC service — repairs, new system installations, and maintenance — across three Southern California counties.
Below you'll find the cities we serve in each county. These lists aren't a hard boundary.
Don't see your city listed? Give us a call at +1 (626) 502-4155 and we'll let you know whether we can help.
Los Angeles County
Los Angeles County is home base: our office is in West Covina, in the San Gabriel Valley. From there we serve communities across the county — from nearby Covina, Glendora, and Baldwin Park to Pasadena, Long Beach, and the Antelope Valley cities of Palmdale and Lancaster.
Learn more about our heating and air conditioning service in West Covina, Covina, and Glendora.
Cities we serve in Los Angeles County
- Los Angeles
- West Covina
- La Puente
- Walnut
- Pomona
- Diamond Bar
- Covina
- Baldwin Park
- El Monte
- City of Industry
- Rowland Heights
- Hacienda Heights
- La Verne
- Claremont
- Azusa
- Glendora
- Pasadena
- Arcadia
- Monrovia
- Duarte
- Whittier
- Norwalk
- Downey
- Bellflower
- Lakewood
- Long Beach
- Torrance
- Inglewood
- Culver City
- Santa Monica
- Burbank
- Glendale
- Palmdale
- Lancaster
Orange County
We provide heating and air conditioning service for homes and businesses across Orange County, from north county cities like Fullerton, Brea, and La Habra to Anaheim, Santa Ana, and Irvine, and down the coast to Huntington Beach, Newport Beach, and San Clemente.
Cities we serve in Orange County
- Anaheim
- Santa Ana
- Irvine
- Orange
- Fullerton
- Huntington Beach
- Garden Grove
- Costa Mesa
- Newport Beach
- Tustin
- Yorba Linda
- Placentia
- Brea
- La Habra
- Buena Park
- Cypress
- Westminster
- Fountain Valley
- Mission Viejo
- Lake Forest
- Laguna Niguel
- Laguna Beach
- Aliso Viejo
- San Clemente
- San Juan Capistrano
- Dana Point
- Rancho Santa Margarita
- Foothill Ranch
San Bernardino County
Our San Bernardino County service area includes the cities listed below, from Chino, Ontario, and Rancho Cucamonga to San Bernardino, Redlands, and Yucaipa, along with High Desert and mountain communities.
Cities we serve in San Bernardino County
- San Bernardino
- Fontana
- Rancho Cucamonga
- Ontario
- Chino
- Chino Hills
- Upland
- Colton
- Rialto
- Redlands
- Loma Linda
- Yucaipa
- Victorville
- Hesperia
- Apple Valley
- Adelanto
- Highland
- Grand Terrace
- Montclair
- Barstow
- Needles
- Twentynine Palms
- Yucca Valley
- Big Bear Lake
We're Ready Whenever You Are
Whether it's a small repair or a full system replacement, our team is ready to help — with honest pricing and no pressure.
- Licensed & Insured
- Same-Day Service
- Residential & Commercial