Lennox 99K31 Relay
The Lennox 99K31 relay is a critical OEM replacement component designed specifically for managing blower motor operations in Lennox residential furnaces and AHUs. Rated for a 2.5-4.0 AMP load, this SPNO (Single Pole Normally Open) relay ensures reliable low-voltage control over high-voltage circuits. Field technicians prioritize the 99K31 for its precise 24V coil voltage compatibility, which prevents common failures like relay chatter or pitted contacts during high-demand cooling and heating cycles. When troubleshooting a furnace blower not turning on, this direct-fit Lennox part replaces aging mechanical relays that have reached their cycle limit. The compact inductive load design facilitates ease of installation in tight control cabinets, maintaining UL-certified safety standards. By utilizing the Lennox 99K31 blower relay, contractors ensure the HVAC control board communicates effectively with the fan motor, optimizing airflow and preventing heat exchanger overheating or evaporator coil freeze-ups.
Key Technical Benefits- OEM Precision: Guaranteed compatibility with Lennox 99K31 specifications, ensuring the blower motor relay matches original factory timing.
- Durable Contacts: Engineered to handle 2.5-4.0 AMP draws, reducing electrical resistance and heat buildup at the terminals.
- Universal 24V Logic: Integrates seamlessly with standard HVAC thermostats and integrated furnace controllers.
- Rapid Response: Minimizes delays in airflow delivery, protecting system components from thermal stress.
What are the signs of a failing Lennox 99K31 relay?
Common indicators include the indoor blower failing to start, a humming sound at the control board, or the fan running continuously even when the thermostat is satisfied.
Can this relay be used in non-Lennox systems?
While designed for Lennox furnace repair, it can function in any application requiring a 24V coil for a 4.0 AMP inductive load, provided the physical mounting matches.
How do I verify the coil voltage?
Ensure your multi-meter reads 24VAC across the coil terminals; standard Lennox 99K31 units are not designed for 120V or 240V control circuits.
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: $114.24
-65%$114.24
$39.98Lennox 99K31 Relay
The Lennox 99K31 relay is a critical OEM replacement component designed specifically for managing blower motor operations in Lennox residential furnaces and AHUs. Rated for a 2.5-4.0 AMP load, this SPNO (Single Pole Normally Open) relay ensures reliable low-voltage control over high-voltage circuits. Field technicians prioritize the 99K31 for its precise 24V coil voltage compatibility, which prevents common failures like relay chatter or pitted contacts during high-demand cooling and heating cycles. When troubleshooting a furnace blower not turning on, this direct-fit Lennox part replaces aging mechanical relays that have reached their cycle limit. The compact inductive load design facilitates ease of installation in tight control cabinets, maintaining UL-certified safety standards. By utilizing the Lennox 99K31 blower relay, contractors ensure the HVAC control board communicates effectively with the fan motor, optimizing airflow and preventing heat exchanger overheating or evaporator coil freeze-ups.
Key Technical Benefits- OEM Precision: Guaranteed compatibility with Lennox 99K31 specifications, ensuring the blower motor relay matches original factory timing.
- Durable Contacts: Engineered to handle 2.5-4.0 AMP draws, reducing electrical resistance and heat buildup at the terminals.
- Universal 24V Logic: Integrates seamlessly with standard HVAC thermostats and integrated furnace controllers.
- Rapid Response: Minimizes delays in airflow delivery, protecting system components from thermal stress.
What are the signs of a failing Lennox 99K31 relay?
Common indicators include the indoor blower failing to start, a humming sound at the control board, or the fan running continuously even when the thermostat is satisfied.
Can this relay be used in non-Lennox systems?
While designed for Lennox furnace repair, it can function in any application requiring a 24V coil for a 4.0 AMP inductive load, provided the physical mounting matches.
How do I verify the coil voltage?
Ensure your multi-meter reads 24VAC across the coil terminals; standard Lennox 99K31 units are not designed for 120V or 240V control circuits.
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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Description
The Lennox 99K31 relay is a critical OEM replacement component designed specifically for managing blower motor operations in Lennox residential furnaces and AHUs. Rated for a 2.5-4.0 AMP load, this SPNO (Single Pole Normally Open) relay ensures reliable low-voltage control over high-voltage circuits. Field technicians prioritize the 99K31 for its precise 24V coil voltage compatibility, which prevents common failures like relay chatter or pitted contacts during high-demand cooling and heating cycles. When troubleshooting a furnace blower not turning on, this direct-fit Lennox part replaces aging mechanical relays that have reached their cycle limit. The compact inductive load design facilitates ease of installation in tight control cabinets, maintaining UL-certified safety standards. By utilizing the Lennox 99K31 blower relay, contractors ensure the HVAC control board communicates effectively with the fan motor, optimizing airflow and preventing heat exchanger overheating or evaporator coil freeze-ups.
Key Technical Benefits- OEM Precision: Guaranteed compatibility with Lennox 99K31 specifications, ensuring the blower motor relay matches original factory timing.
- Durable Contacts: Engineered to handle 2.5-4.0 AMP draws, reducing electrical resistance and heat buildup at the terminals.
- Universal 24V Logic: Integrates seamlessly with standard HVAC thermostats and integrated furnace controllers.
- Rapid Response: Minimizes delays in airflow delivery, protecting system components from thermal stress.
What are the signs of a failing Lennox 99K31 relay?
Common indicators include the indoor blower failing to start, a humming sound at the control board, or the fan running continuously even when the thermostat is satisfied.
Can this relay be used in non-Lennox systems?
While designed for Lennox furnace repair, it can function in any application requiring a 24V coil for a 4.0 AMP inductive load, provided the physical mounting matches.
How do I verify the coil voltage?
Ensure your multi-meter reads 24VAC across the coil terminals; standard Lennox 99K31 units are not designed for 120V or 240V control circuits.
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.
