Goodman P/N 24A34-3 – Genuine OEM Electric Heat Sequencer (2-Switch, 24V, DPST)

The Goodman 24A34-3 is a Genuine Original Equipment Manufacturer (OEM) electric heat sequencer, primarily manufactured by White-Rodgers/Emerson and private-labeled for Goodman, Amana, and Janitrol units. This component is designed to manage the staging of electric heating elements and the indoor blower motor in electric furnaces and air handlers. It ensures that the heating elements and fan turn on and off in timed sequences, preventing sudden temperature changes and managing high electrical loads effectively.

As an authentic OEM component (also identified by cross-reference numbers like 1256504), the 24A34-3 features two switches with specific "On" timing (1-20 seconds) and "Off" timing (40-110 seconds). This design allows for sequenced activation of elements, enhancing energy efficiency and reducing current spikes. The unit is UL Listed and designed for multi-poise mounting, ensuring a reliable, safe fit in compatible systems.

Key Features and Function:

• Timed Sequencing: Controls the staged activation of heating elements and the blower fan motor for optimized performance.
• Genuine OEM Reliability: Official White-Rodgers/Goodman replacement built to factory standards for accurate timing and durability.
• Double Pole, Single Throw (DPST): Features two switches and one timing circuit for robust control of combination loads.
• Safety Compliance: UL Listed component designed to meet rigorous safety standards for electric heating applications.

Product Details and Key Specifications:

• Part Number: 24A34-3
• Catalog #: 1256504 (Goodman OEM label)
• Manufacturer: White-Rodgers / Emerson
• Part Type: Electric Heat Sequencer / Fan Blower Control
• Control Voltage: 24 VAC
• Amperage (FLA): 14A @ 120 VAC / 7A @ 240 VAC
• Amperage (LRA): 72A @ 120 VAC / 42A @ 240 VAC
• Switches: 2 Switches
• On Timings: 1 to 20 seconds
• Off Timings: 40 to 110 seconds
• Mounting: Multi-poise
• Dimensions: 1-15/16" H x 1-5/8" W

🛠️ HVAC Depot Pro Tip: The "Blower Interlock" Note

If your electric furnace uses more than one sequencer (common in multi-element units), Underwriters Laboratories (UL) requires a specific fan interlock circuit. The M1-M2 contacts on these sequencers are often used for the blower motor circuit. Wiring these contacts correctly ensures the blower remains running whenever any heating element is energized, preventing overheating and potential fire hazards. Always verify your wiring diagram matches the specific configuration of the 24A34-3 model you are installing.

Cross-Reference:

The 24A34-3 is a direct OEM replacement for the following part numbers:

• OEM & Catalog Numbers: 24A34-3, 1256504, 611-244, 1056789, HQ1056789, HN67QC005.
• Manufacturer Cross: Supco Q103, Mars 33244, 33844, York 525-37322-000, ICP 1056789.

Extensive Model Compatibility List:

Note: Use 'CTRL+F' to search for your specific model:

• Goodman Air Handler Models:
• A36-05, A36-05C, A36-06, A36-08, A36-10, A36-15, A36-20.
• A42-08C, A42-10, A42-10C, A42-15, A42-20.
• AWUF360516, AWUF360816, AWUF361016, AWUF370516, AWUF370816, AWUF371016.
• AE60-20, AV36-60-20.