Pressure Switches

*Notice to HVACR Licensees Pertaining to HB 1162 (2025)

Dear HVACR Licensee,

The Maryland General Assembly has enacted House Bill 1162 (Chapter 386, 2025), which introduces new requirements related to the sale and purchase of heating, ventilation, air–conditioning, and refrigeration (HVACR) equipment. This law takes effect on October 1, 2025.

Key Provisions:

Sales Restricted to Licensed Professionals: HVACR equipment may only be sold to an individual or a business who:

holds or employs a holder of a Master, Master Restricted, or Limited License issued by the State Board of Heating, Ventilation, Air–Conditioning, and Refrigeration Contractors, or employ an individual who holds one of these licenses;
operates a business that resells equipment to licensed HVACR professionals; or
falls under a statutory exemption set forth in Maryland Annotated Code, Business Regulation Article § 9A–103.

Penalties for Violations:

First violation: Civil penalty up to $1,000. Maryland Annotated Code, Business Regulation Article §§ 9A–501.1 and 9A-505.
Second or subsequent violations: Civil penalty up to $5,000. Id.

What This Means for Licensees:

Ensure your license is current and valid so that you can continue to purchase HVACR equipment without interruption.
Be prepared to confirm your license status when purchasing HVACR equipment.

This legislation takes effect on October 1, 2025.

For questions, please contact the State Board of Heating, Ventilation, Air–Conditioning, and Refrigeration Contractors at DLOPLHVACR-LABOR@maryland.gov.

Lennox 80K4201, Pressure Switch

Lennox 103613-05, 2-Stage Pressure Switch, Set Point High 0.55" W.C.; Set Point Low 0.35" W.C.

Lennox FS6593-1090/U, Pressure Switch

Lennox 103247-08, Pressure Switch

Lennox 103613-01, 2-Stage Pressure Switch, Set Point High 0.90" W.C.; Set Point Low 0.45" W.C.

Lennox 103613-04, 2-Stage Pressure Switch, Set Point High 0.81" W.C.; Set Point Low 0.45" W.C.

Lennox 103613-02, 2-Stage Pressure Switch, Set Point High 0.60" W.C.; Set Point Low 0.35" W.C.

Lennox 103614-18, Pressure Switch, Actuates at 0.90" W.C.; Resets at 1.05" W.C.

Lennox 80K2901, Pressure Switch

Lennox 71J3301, Pressure Switch

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Pressure Switches

Lennox 80K4201, Pressure Switch

Lennox 103613-05, 2-Stage Pressure Switch, Set Point High 0.55" W.C.; Set Point Low 0.35" W.C.

Lennox FS6593-1090/U, Pressure Switch

Lennox 103247-08, Pressure Switch

Lennox 103613-01, 2-Stage Pressure Switch, Set Point High 0.90" W.C.; Set Point Low 0.45" W.C.

Lennox 103613-04, 2-Stage Pressure Switch, Set Point High 0.81" W.C.; Set Point Low 0.45" W.C.

Lennox 103613-02, 2-Stage Pressure Switch, Set Point High 0.60" W.C.; Set Point Low 0.35" W.C.

Lennox 103614-18, Pressure Switch, Actuates at 0.90" W.C.; Resets at 1.05" W.C.

Lennox 80K2901, Pressure Switch

Lennox 71J3301, Pressure Switch

Would you like to create a proposal for a new lead?

Would you like to create a proposal for existing lead?

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