The Trane CNT1538 is a professional-grade ICM fan control board engineered to deliver precise fan speed modulation and sequence timing for Trane heating and cooling equipment

while the 24V architecture includes dedicated terminals for flame sensing (SENSE) and burner grounding (GND)

The internally fused secondary acts as a fail-safe against overcurrent and short circuits

this unit utilizes No

Rugged Build Quality: Heavy-duty pilot burner housing resists oxidation and thermal stress during extended duty cycles

Siemens Building Technology 188-0033 Thermostat 321894-708 The Trane CNT1538 is aThe Siemens Building Technology 188 0033 is a specialized unit mounted hot water replacement thermostat engineered for high demand commercial heating applications. Designed specifically for hydronic HVAC heating control, this analog controller provides precise temperature regulation for terminal units including fan coils and unit heaters. As a critical HVAC replacement part, it enables contractors to restore legacy system performance without the