Trane CNT3787 Limit Switch
The Trane CNT3787 Limit Switch is a critical safety component designed for precise thermal monitoring within residential and commercial furnace heat exchangers. As an OEM Trane replacement part, this 260F CO AUTO limit switch is engineered to interrupt the heating circuit should the internal plenum temperature exceed its fixed 260-degree Fahrenheit threshold. This high-limit cutout ensures the system remains within safe operating parameters, preventing equipment damage caused by restricted airflow or blower motor failure. Featuring a automatic reset configuration, the CNT3787 sensor eliminates the need for manual intervention once the system temperature has normalized to a safe level.
For service technicians, the Trane CNT3787 serves as a direct drop-in for units identifying an "open limit switch" error code. This 15A-rated switch is built to OEM specifications, ensuring proper terminal alignment and mounting depth for an airtight seal against the supply air stream. When diagnosing furnace short-cycling or continuous blower operation, replacing a degraded high-limit switch with a genuine CNT3787 thermal control restores the manufacturer's intended safety sequence and bypasses the reliability issues often found with aftermarket universal alternatives.
Key Benefits for Technicians- Precise 260F Thermal Cutout: Provides a reliable 260-degree Fahrenheit trigger point to protect the primary heat exchanger from warping or failure.
- True OEM Compatibility: Verified Trane/American Standard part ensures the exact fitment and electrical ratings required for 15A high-voltage circuits.
- Automatic Reset Logic: Features a CO (Close on Rise/Open at Limit) auto-resetting mechanism to restore system function automatically after thermal stabilization.
- Durable Construction: Built to withstand constant thermal cycling within the high-heat environment of the furnace plenum.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Original: $125.58
-65%$125.58
$43.95Trane CNT3787 Limit Switch
The Trane CNT3787 Limit Switch is a critical safety component designed for precise thermal monitoring within residential and commercial furnace heat exchangers. As an OEM Trane replacement part, this 260F CO AUTO limit switch is engineered to interrupt the heating circuit should the internal plenum temperature exceed its fixed 260-degree Fahrenheit threshold. This high-limit cutout ensures the system remains within safe operating parameters, preventing equipment damage caused by restricted airflow or blower motor failure. Featuring a automatic reset configuration, the CNT3787 sensor eliminates the need for manual intervention once the system temperature has normalized to a safe level.
For service technicians, the Trane CNT3787 serves as a direct drop-in for units identifying an "open limit switch" error code. This 15A-rated switch is built to OEM specifications, ensuring proper terminal alignment and mounting depth for an airtight seal against the supply air stream. When diagnosing furnace short-cycling or continuous blower operation, replacing a degraded high-limit switch with a genuine CNT3787 thermal control restores the manufacturer's intended safety sequence and bypasses the reliability issues often found with aftermarket universal alternatives.
Key Benefits for Technicians- Precise 260F Thermal Cutout: Provides a reliable 260-degree Fahrenheit trigger point to protect the primary heat exchanger from warping or failure.
- True OEM Compatibility: Verified Trane/American Standard part ensures the exact fitment and electrical ratings required for 15A high-voltage circuits.
- Automatic Reset Logic: Features a CO (Close on Rise/Open at Limit) auto-resetting mechanism to restore system function automatically after thermal stabilization.
- Durable Construction: Built to withstand constant thermal cycling within the high-heat environment of the furnace plenum.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
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Product Information
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Shipping & Returns
Description
The Trane CNT3787 Limit Switch is a critical safety component designed for precise thermal monitoring within residential and commercial furnace heat exchangers. As an OEM Trane replacement part, this 260F CO AUTO limit switch is engineered to interrupt the heating circuit should the internal plenum temperature exceed its fixed 260-degree Fahrenheit threshold. This high-limit cutout ensures the system remains within safe operating parameters, preventing equipment damage caused by restricted airflow or blower motor failure. Featuring a automatic reset configuration, the CNT3787 sensor eliminates the need for manual intervention once the system temperature has normalized to a safe level.
For service technicians, the Trane CNT3787 serves as a direct drop-in for units identifying an "open limit switch" error code. This 15A-rated switch is built to OEM specifications, ensuring proper terminal alignment and mounting depth for an airtight seal against the supply air stream. When diagnosing furnace short-cycling or continuous blower operation, replacing a degraded high-limit switch with a genuine CNT3787 thermal control restores the manufacturer's intended safety sequence and bypasses the reliability issues often found with aftermarket universal alternatives.
Key Benefits for Technicians- Precise 260F Thermal Cutout: Provides a reliable 260-degree Fahrenheit trigger point to protect the primary heat exchanger from warping or failure.
- True OEM Compatibility: Verified Trane/American Standard part ensures the exact fitment and electrical ratings required for 15A high-voltage circuits.
- Automatic Reset Logic: Features a CO (Close on Rise/Open at Limit) auto-resetting mechanism to restore system function automatically after thermal stabilization.
- Durable Construction: Built to withstand constant thermal cycling within the high-heat environment of the furnace plenum.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
