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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
