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 October 6, 2026.

34 contractors

1. Aa HVAC INC

   Ontario, CA · CSLB #1057513 · as of October 6, 2026
   Active · clear
2. Adaptive Controls Services

   Ontario, CA · CSLB #1116142 · as of October 6, 2026
   Active · clear
3. A G Heating & Air

   Ontario, CA · CSLB #1132532 · as of October 6, 2026
   Active · clear
4. Air Bee HVAC

   Ontario, CA · CSLB #1158451 · as of October 6, 2026
   Active · clear
5. Air Control Specialties INC

   Ontario, CA · CSLB #570881 · as of October 6, 2026
   Active · clear
6. Airtong Heating & Cooling

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

   Ontario, CA · CSLB #953750 · as of October 6, 2026
   Active · clear
8. DS HVAC INC

   Ontario, CA · CSLB #1132699 · as of October 6, 2026
   Active · clear
9. DSS High Performance HVAC Solutions

   Ontario, CA · CSLB #1158389 · as of October 6, 2026
   Active · clear
10. Effina

    Ontario, CA · CSLB #1150901 · as of October 6, 2026
    Active · clear
11. Elite Precision Air Systems

    Ontario, CA · CSLB #1139417 · as of October 6, 2026
    Active · clear
12. Erwin Advanced Air Systems

    Ontario, CA · CSLB #897796 · as of October 6, 2026
    Active · clear
13. Foothill Heating & Air Conditioning

    Ontario, CA · CSLB #979917 · as of October 6, 2026
    Active · clear
14. Get It Repaired Heating And Air INC

    Ontario, CA · CSLB #1155418 · as of October 6, 2026
    Active · clear
15. Julan Hao

    Ontario, CA · CSLB #1083815 · as of October 6, 2026
    Active · clear
16. Jason Jang

    Ontario, CA · CSLB #1035039 · as of October 6, 2026
    Active · clear
17. Jesse's Air Systems A / C & Heating

    Ontario, CA · CSLB #864645 · as of October 6, 2026
    Active · clear
18. Just Everything Heating & Air INC

    Ontario, CA · CSLB #892799 · as of October 6, 2026
    Active · clear
19. Just Temperature INC

    Ontario, CA · CSLB #1062818 · as of October 6, 2026
    Active · clear
20. Dao Le

    Ontario, CA · CSLB #864673 · as of October 6, 2026
    Active · clear
21. Chun Li

    Ontario, CA · CSLB #1054025 · as of October 6, 2026
    Active · clear
22. Magnison And Moen INC

    Ontario, CA · CSLB #264898 · as of October 6, 2026
    Active · clear
23. Marcos Air Conditioning

    Ontario, CA · CSLB #950285 · as of October 6, 2026
    Active · clear
24. Master Chill Heating And Air

    Ontario, CA · CSLB #1138989 · as of October 6, 2026
    Active · clear
25. Mechanical Control

    Ontario, CA · CSLB #1019123 · as of October 6, 2026
    Active · clear
26. Nick Air Conditioning INC

    Ontario, CA · CSLB #1135910 · as of October 6, 2026
    Active · clear
27. Northstar Phac INC

    Ontario, CA · CSLB #916254 · as of October 6, 2026
    Active · clear
28. Ontario Refrigeration Commercial Air Conditioning Heating & Contr

    Ontario, CA · CSLB #315638 · as of October 6, 2026
    Active · clear
29. Phillip Park

    Ontario, CA · CSLB #1102884 · as of October 6, 2026
    Active · clear
30. Reliant Cooling And Power LLC

    Ontario, CA · CSLB #1156506 · as of October 6, 2026
    Active · clear
31. Technicool Refrigeration

    Ontario, CA · CSLB #987769 · as of October 6, 2026
    Active · clear
32. Virtue Air Conditioning INC

    Ontario, CA · CSLB #1053503 · as of October 6, 2026
    Active · clear
33. West End Heating And Air

    Ontario, CA · CSLB #1110549 · as of October 6, 2026
    Active · clear
34. Atlantic Refrigeration & Appliances

    Ontario, CA · CSLB #662919 · as of October 6, 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 October 6, 2026. IsItLicensed is not affiliated with or endorsed by the CSLB or the State of California. Always verify against the official record.