Rheem 42-24166-89 (-)0.40 WC (-)0.20 WC Dual Pressure Switch

The Rheem 42-24166-89 (-)0.40 WC (-)0.20 WC Dual Pressure Switch is a Rheem pressure switch for HVAC repair and replacement work. Use it when the part number 42-24166-89 and the listed specifications match the equipment being serviced.

42-24166-89 is an official OEM (-)0.40 WC (-)0.20 WC Dual Pressure Switch for Rheem HVAC equipment.

Key Specs

• Product Type: Pressure Switch

Expert Verdict

Reviewed by the SuperArbor Pro Desk: choose this part when the existing component label and unit documentation match 42-24166-89 and the spec set above. It is best suited for targeted HVAC service repairs where exact fitment matters more than broad universal compatibility.

FAQs

What is the Rheem 42-24166-89 used for?

It is a pressure switch for compatible Rheem HVAC equipment. Match the part number 42-24166-89 and the equipment service literature before ordering or installing.

Which specs should I verify before purchase?

Verify the spec set shown for this part: Product Type: Pressure Switch. The replacement should match the existing component and the unit documentation.

How do I confirm this is the right replacement?

Compare the part number 42-24166-89, the pressure switch description, and any unit model references with the original component and the service manual.

Is this an OEM-style replacement part?

Use it as a direct replacement only when Rheem documentation lists 42-24166-89 or an approved equivalent for the unit being serviced.

Who should install this HVAC component?

A qualified HVAC technician should install and test the pressure switch. Disconnect power first, follow lockout procedures, and confirm safe operation after replacement.

Safety and Installation Notes

Disconnect power before service. HVAC electrical and combustion-related components should be installed and tested by a qualified technician. After installation, confirm wiring, mounting, airflow or fluid routing as applicable, and normal system operation.