Licensed Heating & Air Conditioning (C-20) contractors in Ontario, CA

The California Contractors State License Board (CSLB) lists 34 Heating & Air Conditioning (C-20) contractors in Ontario, California. Each links to a full dossier with license status, insurance, bond, and enforcement — as of June 27, 2026.

34 contractors

1. Aa HVAC INC

   Ontario, CA · CSLB #1057513 · as of June 27, 2026
   Active · clear
2. Adaptive Controls Services

   Ontario, CA · CSLB #1116142 · as of June 27, 2026
   Active · clear
3. A G Heating & Air

   Ontario, CA · CSLB #1132532 · as of June 27, 2026
   Active · clear
4. Air Control Specialties INC

   Ontario, CA · CSLB #570881 · as of June 27, 2026
   Active · clear
5. Airtong Heating & Cooling

   Ontario, CA · CSLB #991016 · as of June 27, 2026
   Active · clear
6. The Climate Controllers A Partnership

   Ontario, CA · CSLB #953750 · as of June 27, 2026
   Active · clear
7. DS HVAC INC

   Ontario, CA · CSLB #1132699 · as of June 27, 2026
   Active · clear
8. Effina

   Ontario, CA · CSLB #1150901 · as of June 27, 2026
   Active · clear
9. Elite Air Solutions

   Ontario, CA · CSLB #1041482 · as of June 27, 2026
   Active · clear
10. Elite Precision Air Systems

    Ontario, CA · CSLB #1139417 · as of June 27, 2026
    Active · clear
11. Erwin Advanced Air Systems

    Ontario, CA · CSLB #897796 · as of June 27, 2026
    Active · clear
12. Foothill Heating & Air Conditioning

    Ontario, CA · CSLB #979917 · as of June 27, 2026
    Active · clear
13. Get It Repaired Heating And Air INC

    Ontario, CA · CSLB #1155418 · as of June 27, 2026
    Active · clear
14. Julan Hao

    Ontario, CA · CSLB #1083815 · as of June 27, 2026
    Active · clear
15. Jason Jang

    Ontario, CA · CSLB #1035039 · as of June 27, 2026
    Active · clear
16. Jesse's Air Systems A / C & Heating

    Ontario, CA · CSLB #864645 · as of June 27, 2026
    Active · clear
17. Just Everything Heating & Air INC

    Ontario, CA · CSLB #892799 · as of June 27, 2026
    Active · clear
18. Just Temperature INC

    Ontario, CA · CSLB #1062818 · as of June 27, 2026
    Active · clear
19. Dao Le

    Ontario, CA · CSLB #864673 · as of June 27, 2026
    Active · clear
20. Chun Li

    Ontario, CA · CSLB #1054025 · as of June 27, 2026
    Active · clear
21. Magnison And Moen INC

    Ontario, CA · CSLB #264898 · as of June 27, 2026
    Active · clear
22. Marcos Air Conditioning

    Ontario, CA · CSLB #950285 · as of June 27, 2026
    Active · clear
23. Master Chill Heating And Air

    Ontario, CA · CSLB #1138989 · as of June 27, 2026
    Active · clear
24. Mechanical Control

    Ontario, CA · CSLB #1019123 · as of June 27, 2026
    Active · clear
25. Nick Air Conditioning INC

    Ontario, CA · CSLB #1135910 · as of June 27, 2026
    Active · clear
26. Northstar Phac INC

    Ontario, CA · CSLB #916254 · as of June 27, 2026
    Active · clear
27. Ontario Refrigeration Commercial Air Conditioning Heating & Contr

    Ontario, CA · CSLB #315638 · as of June 27, 2026
    Active · clear
28. Phillip Park

    Ontario, CA · CSLB #1102884 · as of June 27, 2026
    Active · clear
29. Reliant Cooling And Power LLC

    Ontario, CA · CSLB #1156506 · as of June 27, 2026
    Active · clear
30. Technicool Refrigeration

    Ontario, CA · CSLB #987769 · as of June 27, 2026
    Active · clear
31. Virtue Air Conditioning INC

    Ontario, CA · CSLB #1053503 · as of June 27, 2026
    Active · clear
32. West End Heating And Air

    Ontario, CA · CSLB #1110549 · as of June 27, 2026
    Active · clear
33. Kyle Gilmore Plumbing HVAC R

    Ontario, CA · CSLB #883106 · as of June 27, 2026
    Suspended · bond
34. Atlantic Refrigeration & Appliances

    Ontario, CA · CSLB #662919 · as of June 27, 2026
    Suspended · workers' comp

See all Heating & Air Conditioning (C-20) contractors in California →

Data sourced from the California Contractors State License Board (CSLB), current as of June 27, 2026. IsItLicensed is not affiliated with or endorsed by the CSLB or the State of California. Always verify against the official record.