Lennox 87J71 Sequencer
The Lennox 87J71 Heat Sequencer is a critical OEM replacement component designed to manage the staging of electric heating elements in residential and light commercial air handlers. This upper heat sequencer functions as a thermal relay, utilizing a 24V solid-state PTC heater to actuate a bimetal disc. By providing precise time delay intervals, it prevents massive inrush currents that could otherwise trip circuit breakers or damage the electrical service. Engineered for compatibility with 120V and 240V systems, the 87J71 ensures that heating banks and the blower motor are energized in a specific order, optimizing airflow and heat transfer across the electric furnace coils. As a veteran-preferred HVAC sequencer relay, this part is built with a durable aluminum base for heat dissipation and robust terminals to resist vibration and thermal stress. Replacing a sticking or failed sequencer with this genuine Lennox 87J71 restores safe multi-stage heating operation and eliminates issues such as short-cycling or cold-blow conditions during defrost or auxiliary heating cycles.
Key Benefits:- OEM Precision: Specifically designed for Lennox equipment to ensure exact timing and thermal time delay specifications.
- Circuit Protection: Staged activation of elements reduces initial electrical load, protecting the HVAC system from surges.
- Universal Mounting: Compact design with a standard mounting bracket allows for straightforward installation in various cabinet orientations.
- Thermal Stability: Features an integrated PTC heater that stabilizes the switching action regardless of ambient temperature fluctuations.
- How do I tell if my 87J71 sequencer is failing? Common symptoms include the furnace blower not turning off, heating elements staying energized after a call for heat ends, or a complete lack of auxiliary heat.
- Can this be used to replace a White Rodgers or Klixon sequencer? While this is a dedicated Lennox OEM part, it often serves as a direct functional cross reference for various multi-stack sequencers. Always verify the terminal count and timing range before installation.
- What voltage does the control circuit use? The base heater on this model is designed for standard 24VAC control voltage from the thermostat or transformer.
This item is not eligible for free shipping.
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.
Lennox 87J71 Sequencer
The Lennox 87J71 Heat Sequencer is a critical OEM replacement component designed to manage the staging of electric heating elements in residential and light commercial air handlers. This upper heat sequencer functions as a thermal relay, utilizing a 24V solid-state PTC heater to actuate a bimetal disc. By providing precise time delay intervals, it prevents massive inrush currents that could otherwise trip circuit breakers or damage the electrical service. Engineered for compatibility with 120V and 240V systems, the 87J71 ensures that heating banks and the blower motor are energized in a specific order, optimizing airflow and heat transfer across the electric furnace coils. As a veteran-preferred HVAC sequencer relay, this part is built with a durable aluminum base for heat dissipation and robust terminals to resist vibration and thermal stress. Replacing a sticking or failed sequencer with this genuine Lennox 87J71 restores safe multi-stage heating operation and eliminates issues such as short-cycling or cold-blow conditions during defrost or auxiliary heating cycles.
Key Benefits:- OEM Precision: Specifically designed for Lennox equipment to ensure exact timing and thermal time delay specifications.
- Circuit Protection: Staged activation of elements reduces initial electrical load, protecting the HVAC system from surges.
- Universal Mounting: Compact design with a standard mounting bracket allows for straightforward installation in various cabinet orientations.
- Thermal Stability: Features an integrated PTC heater that stabilizes the switching action regardless of ambient temperature fluctuations.
- How do I tell if my 87J71 sequencer is failing? Common symptoms include the furnace blower not turning off, heating elements staying energized after a call for heat ends, or a complete lack of auxiliary heat.
- Can this be used to replace a White Rodgers or Klixon sequencer? While this is a dedicated Lennox OEM part, it often serves as a direct functional cross reference for various multi-stack sequencers. Always verify the terminal count and timing range before installation.
- What voltage does the control circuit use? The base heater on this model is designed for standard 24VAC control voltage from the thermostat or transformer.
This item is not eligible for free shipping.
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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Shipping & Returns
Description
The Lennox 87J71 Heat Sequencer is a critical OEM replacement component designed to manage the staging of electric heating elements in residential and light commercial air handlers. This upper heat sequencer functions as a thermal relay, utilizing a 24V solid-state PTC heater to actuate a bimetal disc. By providing precise time delay intervals, it prevents massive inrush currents that could otherwise trip circuit breakers or damage the electrical service. Engineered for compatibility with 120V and 240V systems, the 87J71 ensures that heating banks and the blower motor are energized in a specific order, optimizing airflow and heat transfer across the electric furnace coils. As a veteran-preferred HVAC sequencer relay, this part is built with a durable aluminum base for heat dissipation and robust terminals to resist vibration and thermal stress. Replacing a sticking or failed sequencer with this genuine Lennox 87J71 restores safe multi-stage heating operation and eliminates issues such as short-cycling or cold-blow conditions during defrost or auxiliary heating cycles.
Key Benefits:- OEM Precision: Specifically designed for Lennox equipment to ensure exact timing and thermal time delay specifications.
- Circuit Protection: Staged activation of elements reduces initial electrical load, protecting the HVAC system from surges.
- Universal Mounting: Compact design with a standard mounting bracket allows for straightforward installation in various cabinet orientations.
- Thermal Stability: Features an integrated PTC heater that stabilizes the switching action regardless of ambient temperature fluctuations.
- How do I tell if my 87J71 sequencer is failing? Common symptoms include the furnace blower not turning off, heating elements staying energized after a call for heat ends, or a complete lack of auxiliary heat.
- Can this be used to replace a White Rodgers or Klixon sequencer? While this is a dedicated Lennox OEM part, it often serves as a direct functional cross reference for various multi-stack sequencers. Always verify the terminal count and timing range before installation.
- What voltage does the control circuit use? The base heater on this model is designed for standard 24VAC control voltage from the thermostat or transformer.
This item is not eligible for free shipping.
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.
