Lennox 77W04 24v 2 Stage Gas Valve

The Lennox 77W04 24v 2 Stage Gas Valve is a Lennox gas valve for HVAC repair and replacement work. Use it when the part number 77W04 and the listed specifications match the equipment being serviced.

77W04 is an official OEM 24v 2 Stage Gas Valve for Lennox HVAC equipment.

Key Specs

• Voltage: 24V
• Product Type: Gas Valve

Fitment Notes

Captured equipment fit data references models including EL280DF070P36A-1, EL280DF090P48B-1, EL280DF110P60C-1, EL280UH070P24A-1, EL280UH070P36A-1, EL280UH070XP36A-1, EL280UH090P36B-1, EL280UH090P48B-1, EL280UH090XP48B-1, EL280UH110P48C-1, EL280UH110P60C-1, EL280UH110XP60C-1. Verify the complete unit model and service manual before installation.

Expert Verdict

Reviewed by the SuperArbor Pro Desk: choose this part when the existing component label and unit documentation match 77W04 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 Lennox 77W04 used for?

It is a gas valve for compatible Lennox HVAC equipment. Match the part number 77W04 and the equipment service literature before ordering or installing.

Which specs should I verify before purchase?

Verify the spec set shown for this part: Voltage: 24V; Product Type: Gas Valve. The replacement should match the existing component and the unit documentation.

Does the electrical rating need to match exactly?

Yes. Confirm voltage rating 24V against the failed component label. Do not substitute a different rating unless the equipment manufacturer allows it.

Which equipment models are referenced in the fit data?

Captured fit data references models such as EL280DF070P36A-1, EL280DF090P48B-1, EL280DF110P60C-1, EL280UH070P24A-1, EL280UH070P36A-1, EL280UH070XP36A-1. Treat this as a fitment aid and verify the complete model list in the equipment documentation.

Who should install this HVAC component?

A qualified HVAC technician should install and test the gas valve. 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.