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this specific stem extension is sized specifically for the 13-inch diaphragm variants (C and E series) and will not provide the correct geometry for 5-inch or 8-inch models
Engineered with an N-style mounting block
What Trane models are compatible with the SHF1503 shaft
maintaining the exact orifice alignment required for a stable flame pattern and optimal manifold pressure
the 24V coil minimizes power draw while providing the rapid contact closing required for modern HVAC blower control systems
Trane CNT3728 Control R-410A this specific stem extension isEnsure precise equipment operation with the Trane CNT3728 Dual Staging Compressor Control, a critical OEM component designed for high efficiency multi stage cooling. As a 24 VAC hardwired HVAC compressor control board, it manages the sequential activation of dual compressors, allowing residential or light commercial systems to fluctuate between partial and full capacity. This Trane replacement control board is essential for maintaining consistent
