Contact

To contact us via email and tell us a little bit about what it is that you’re looking for, feel free to use the form below and we will contact you as soon as possible.

General Information

Business Hours are 8:00 AM to 5:00 PM Monday – Friday and Saturdays by appointment.
Office will be closed the 2nd Tuesday morning of each month for company-wide training.

A-1 Guaranteed Phone Numbers

TOLL FREE : (888) 421-2473
Vallejo : (707) 645-0734
Fairfield : (707) 421-8782
Contra Costa : (925) 609-8800

A-1 Guaranteed Emails

Service: service@a-1guaranteed.com
Maintenance: maintenance@a-1guaranteed.com 
Free Estimates: info@a-1guaranteed.com
Marketing & Personnel: info@a-1guaranteed.com

A-1 Guaranteed Business Address

A-1 Guaranteed Heating & Air Conditioning
1768 Broadway St. Vallejo,
CA 94589

Our Service Areas

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Why Choose

A-1 Guaranteed?

Family-Owned & Operated

Highly Experienced with Nearly 30 Years in Business

Heat Pump & Home Electrification Experts

Participating Contractor with Rebate & Incentive Programs

Factory Trained Installers & Service Technicians

Drug-Free Environment Maintained & Enforced

All Employees Fully Background Checked 

Voted Best Heating & Cooling Company for 19 Years

Voted Best of the Bay by KRON 4 TV for 5 Years 

Diamond-Certified Company 

Four-Time Angie’s List Super Service Award Winner

Better Business Bureau Honor Roll for 27 Years 

Certified Green Business

North American Technician Excellent (NATE) Certified

Solano County’s Best of 2024
Golden State Rebates
GoGreen Financing
18 Years Diamond Certified
HEEHRA Rebate
Comfortably California
Hero Registered Contractor
TECH Clean California
Kasey’s Klub
SMUD Participating Contractor
2022 Daily Republic Reader’s Choice
2018 Angie’s List Super Service
2024 Nextdoor Neighborhood Favorite
Solano County’s Best of 2018
Energy Upgrade California
BPI GoldStar Contractor
Bay Area Green Business
BBB Accredited Business
EGIA Approved Contractor
KRON 4 Best of the Bay
NATE
Bryant Factory Authorized Dealer
Diamond Certified