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Texas A/C Technician › Collin County

William B III Hartwell

Hartwell, William B III

William B III Hartwell holds licenses across 2 Texas trades — A/C Technician and Electrical Contractor under TDLR License #37846. The license is registered in Collin County, Texas. Current status: active.

Verification record

License #37846

  • A/C Technician

    A/C Technician · Expires January 24, 2027

    Active

  • Electrical Contractor

    Electrical Contractor · Expired March 1, 2026

    Expired
Years in TDLR record
0
TDLR trades held
2
Tenure rank, A/C Technicians in Collin
#655

Scope of work

What these licenses authorize

A/C Technician

An A/C Technician license authorizes a person to perform HVAC installation, alteration, and service work in Texas under the direct authority of a licensed HVAC Contractor. A Certified (CER) technician has passed the TDLR exam and accumulated verifiable field experience; a Registered (REG) technician is in the entry pathway. Neither status authorizes contracting for work independently — only a licensed contractor may bid and contract. Refrigerant handling additionally requires federal EPA Section 608 certification.

Electrical Contractor

An Electrical Contractor (TECL) license authorizes the business to bid, contract for, and perform electrical work in Texas. Every TECL must designate a qualifying Master Electrician whose individual license backs the contractor license, must carry general liability insurance, and is renewed annually. The TECL is the license a homeowner verifies when hiring a company; the named Master Electrician is the individual whose qualifications support the contractor's authority. Some Texas cities require additional local registration before pulling permits.

Source

Published from the Texas Department of Licensing & Regulation All Licenses dataset. Record last changed · last verified against TDLR .

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