622341 Nordyne 24 VAC / 40 VA Control Transformer
Product Overview
The Nordyne 622341R control transformer supplies stable 24 VAC power from a 120 VAC line for residential HVAC systems. As a direct-fit OEM replacement, it ensures reliable operation of thermostats, safety controls, relays, and valves by delivering consistent low-voltage output under varying load conditions.
Key benefits:
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Direct replacement for Nordyne, Coleman, and compatible 40 VA transformers
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Compact design with dual mounting tabs for quick retrofit
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High-grade silicon steel laminations reduce heat and hum
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Fully encapsulated windings for vibration and moisture resistance
Technical Specifications
| Specification | Detail |
|---|---|
| Primary voltage | 120 VAC ± 10 % @ 60 Hz |
| Secondary voltage | 24 VAC ± 5 % @ 60 Hz |
| Power rating | 40 VA nominal |
| Insulation class | Class B (130 °C) |
| Terminals | ¼″ quick-connect spade |
| Mounting | Dual stamped mounting tabs |
| Dimensions (L × W × H) | 3.0″ × 2.2″ × 2.0″ (76 × 56 × 51 mm) |
| Weight | 1.1 lb (0.50 kg) |
Cross-Reference Part Numbers
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Nordyne 622341R
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Coleman 622341R
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Neuco 622341R
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OEM legacy: 622329, 622341
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White-Rodgers 90-353
Compatibility
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Nordyne and Coleman residential furnaces and air handlers
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Bryant 310A/320A and Payne 355A control panels
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American Standard N5/P6 series heat pumps
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Carrier/Bryant 24 VAC systems requiring 40 VA transformers
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Any HVAC control board designed for a 24 VAC @ 40 VA power source
Technician Notes
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Always disconnect all power before servicing the transformer.
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Verify secondary voltage under load using a true-RMS meter; expect 24 VAC ± 5 %.
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Mount firmly on a clean, vibration-free surface using the dual tabs.
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Strip wires cleanly and seat under spade terminals; torque screws to prevent arcing.
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Allow ½ inch clearance around the transformer for heat dissipation.
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Keep a spare 622341R on service calls to minimize customer downtime.