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California contractor license

Kooler Air Conditioning & Heating

Kooler Air Conditioning & Heating of Vernon holds California license 738986 (B General Building, C10 Electrical, C20 Warm-Air Heating, Ventilating and Air-Conditioning). The CSLB file dated Oct 29, 2026 lists it as active.1 It expires Aug 31, 2027.

Doing business as Kooler JC Inc.

Licensed 29 years, longer than 84% of 15,216 active California electrical contractors.

Active

Kooler Air Conditioning & Heating, Vernon

License
738986
Class
B General Building; C10 Electrical; C20 Warm-Air Heating, Ventilating and Air-Conditioning
Expires
Aug 31, 2027
Bond
$25,000
Workers' comp
Insured to Jan 1, 2027

CSLB file dated Oct 29, 2026

From the CSLB file dated Oct 29, 2026. Not a consumer report; check the board before you hire.

What bond, insurance and workers' comp are on file?

Bond
$25,000Western Surety Company, from Jul 17, 2025, continuous
Liability insurance
Not in the CSLB fileCheck with the board
Workers' comp
InsuredOmaha National Casualty Company, from Jan 1, 2026, to Jan 1, 2027

Who is on this license?

Responsible managing officer
Joon W. LeeSince Aug 6, 1997
CEO and president
Joon C. LeeSince Aug 6, 1997

What work does this license cover?

Issued Aug 6, 1997.

Which other Vernon businesses hold B General Building?

California electrical contractorsCalifornia HVAC contractors

What should you check before hiring?

What to ask before you hire

  1. Get the license number in writing. The name on the license should match the name on your contract and invoice.
  2. Check the class covers the job. A license for one trade doesn't cover another. California license classes
  3. Ask for a certificate of insurance sent to you by the insurance agent, not handed over by the contractor. How to read a COI
  4. Ask who will be on site. If a crew works on your property, ask for proof of workers' comp. An exemption on file means the contractor told the CSLB it has no employees.
  5. Put it in a written contract: license number, price, start date and payment schedule. Check the license again on the day you sign.

If the license is lapsed

  1. Don't sign or pay a deposit until the CSLB shows the license active again.
  2. Ask the contractor why. For a bond or insurance lapse, ask for proof that the new bond or policy was filed with the CSLB, then check again.
  3. If work has started, hold further payments, keep the contract, receipts and photos, and file a complaint with Contractors State License Board (CSLB).
  4. Check another contractor. California license lookup

Sources

  1. CSLB License Master (cslb.ca.gov, Oct 29, 2026)
  2. Contractors State License Board (CSLB)