Carrier 338085-408 Limit Switch
As a field technician, you know that a tripped main limit switch is often the only thing standing between a standard service call and a heat exchanger failure. The Carrier 338085-408 is a factory-authorized L210-20F limit switch, engineered specifically for high-limit thermal protection in Carrier, Bryant, and Payne furnaces. This OEM HVAC replacement part features a normally closed circuit that opens precisely at 210°F to interrupt the gas valve circuit if the plenum temperature exceeds safe operating parameters. With a 20°F differential, this disc-style limit switch automatically resets once the furnace high limit temperature drops back to 190°F, allowing the system to resume normal heating cycles. Constructed with a 120 VAC/15A electrical rating and a durable thermoplastic housing, this 338085-408 thermal switch ensures reliable snap-action performance and long-term HVAC system safety. When diagnosing furnace overheating or airflow restrictions, swapping in this genuine Carrier limit switch ensures the equipment maintains its original safety certification and operational integrity.
Key Benefits for the Contractor:- Precise Thermal Calibration: Factory-set to open at 210°F (L210) with a 20°F reset differential for accurate high-limit protection.
- Universal Brand Compatibility: Drop-in replacement for Carrier 338085-408, compatible with various Bryant and Payne forced-air applications.
- Automatic Reset Functionality: Eliminates manual intervention by closing the circuit once the system cools to 190°F.
- Heavy-Duty Electrical Rating: Features a high-capacity 15A rating at 120 VAC to withstand high-cycle commercial and residential environments.
- OEM Reliability: Ensures exact physical mounting and electrical specs for main limit switch replacement without modification.
What causes the 338085-408 limit switch to trip frequently?
Repeated tripping is usually indicative of restricted airflow, such as a dirty air filter, blocked return ducts, or a failing blower motor, causing the heat exchanger to reach the 210°F cutout limit.
Is the 338085-408 a manual or automatic reset switch?
This is an automatic reset limit switch. It will automatically re-engage the circuit once the temperature at the sensor drops 20°F below the opening threshold.
Can I use this for non-Carrier furnace brands?
While technically a universal disc-style switch, the 338085-408 is specifically calibrated for Carrier, Payne, and Bryant equipment. Always verify the temperature rating and insertion depth against the original part.
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: $102.34
-65%$102.34
$35.82Carrier 338085-408 Limit Switch
As a field technician, you know that a tripped main limit switch is often the only thing standing between a standard service call and a heat exchanger failure. The Carrier 338085-408 is a factory-authorized L210-20F limit switch, engineered specifically for high-limit thermal protection in Carrier, Bryant, and Payne furnaces. This OEM HVAC replacement part features a normally closed circuit that opens precisely at 210°F to interrupt the gas valve circuit if the plenum temperature exceeds safe operating parameters. With a 20°F differential, this disc-style limit switch automatically resets once the furnace high limit temperature drops back to 190°F, allowing the system to resume normal heating cycles. Constructed with a 120 VAC/15A electrical rating and a durable thermoplastic housing, this 338085-408 thermal switch ensures reliable snap-action performance and long-term HVAC system safety. When diagnosing furnace overheating or airflow restrictions, swapping in this genuine Carrier limit switch ensures the equipment maintains its original safety certification and operational integrity.
Key Benefits for the Contractor:- Precise Thermal Calibration: Factory-set to open at 210°F (L210) with a 20°F reset differential for accurate high-limit protection.
- Universal Brand Compatibility: Drop-in replacement for Carrier 338085-408, compatible with various Bryant and Payne forced-air applications.
- Automatic Reset Functionality: Eliminates manual intervention by closing the circuit once the system cools to 190°F.
- Heavy-Duty Electrical Rating: Features a high-capacity 15A rating at 120 VAC to withstand high-cycle commercial and residential environments.
- OEM Reliability: Ensures exact physical mounting and electrical specs for main limit switch replacement without modification.
What causes the 338085-408 limit switch to trip frequently?
Repeated tripping is usually indicative of restricted airflow, such as a dirty air filter, blocked return ducts, or a failing blower motor, causing the heat exchanger to reach the 210°F cutout limit.
Is the 338085-408 a manual or automatic reset switch?
This is an automatic reset limit switch. It will automatically re-engage the circuit once the temperature at the sensor drops 20°F below the opening threshold.
Can I use this for non-Carrier furnace brands?
While technically a universal disc-style switch, the 338085-408 is specifically calibrated for Carrier, Payne, and Bryant equipment. Always verify the temperature rating and insertion depth against the original part.
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.
Product Information
Product Information
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Description
As a field technician, you know that a tripped main limit switch is often the only thing standing between a standard service call and a heat exchanger failure. The Carrier 338085-408 is a factory-authorized L210-20F limit switch, engineered specifically for high-limit thermal protection in Carrier, Bryant, and Payne furnaces. This OEM HVAC replacement part features a normally closed circuit that opens precisely at 210°F to interrupt the gas valve circuit if the plenum temperature exceeds safe operating parameters. With a 20°F differential, this disc-style limit switch automatically resets once the furnace high limit temperature drops back to 190°F, allowing the system to resume normal heating cycles. Constructed with a 120 VAC/15A electrical rating and a durable thermoplastic housing, this 338085-408 thermal switch ensures reliable snap-action performance and long-term HVAC system safety. When diagnosing furnace overheating or airflow restrictions, swapping in this genuine Carrier limit switch ensures the equipment maintains its original safety certification and operational integrity.
Key Benefits for the Contractor:- Precise Thermal Calibration: Factory-set to open at 210°F (L210) with a 20°F reset differential for accurate high-limit protection.
- Universal Brand Compatibility: Drop-in replacement for Carrier 338085-408, compatible with various Bryant and Payne forced-air applications.
- Automatic Reset Functionality: Eliminates manual intervention by closing the circuit once the system cools to 190°F.
- Heavy-Duty Electrical Rating: Features a high-capacity 15A rating at 120 VAC to withstand high-cycle commercial and residential environments.
- OEM Reliability: Ensures exact physical mounting and electrical specs for main limit switch replacement without modification.
What causes the 338085-408 limit switch to trip frequently?
Repeated tripping is usually indicative of restricted airflow, such as a dirty air filter, blocked return ducts, or a failing blower motor, causing the heat exchanger to reach the 210°F cutout limit.
Is the 338085-408 a manual or automatic reset switch?
This is an automatic reset limit switch. It will automatically re-engage the circuit once the temperature at the sensor drops 20°F below the opening threshold.
Can I use this for non-Carrier furnace brands?
While technically a universal disc-style switch, the 338085-408 is specifically calibrated for Carrier, Payne, and Bryant equipment. Always verify the temperature rating and insertion depth against the original part.
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.
