Lennox 25J38 Fan Relay
As a core component for indoor blower control, the Lennox 25J38 Fan Relay is a heavy-duty 24V SPDT (Single Pole Double Throw) switch designed for high-reliability switching in Lennox furnaces and air handlers. Professionals know that when a blower motor relay fails, it typically leads to a "no-air" condition or a fan that runs continuously, potentially straining the motor windings. This OEM Lennox 25038 replacement features a 25A contact rating at 50/60 Hz, providing the robust amperage handling required for varied induction motor loads. The 25J3801 relay is engineered with a compact footprint—measuring approximately 2.35" x 2.53" x 1.36"—allowing for a direct fit on existing control boards or mounting brackets without field modifications. Whether you are dealing with a stuck fan relay or a burnt-out 24V coil, this HVAC blower relay restoration ensures precise thermostat signal response and optimal airflow across the evaporator coil or heat exchanger.
Key Benefits- High Contact Capacity: Rated for 25 Amps, ensuring it can handle the startup inrush current of most residential blower motors.
- Universal SPDT Configuration: Features 24V coil logic to manage single-stage fan speeds or facilitate cross-reference compatibility with various Lennox 25J3801 applications.
- Compact Mechanical Design: The standardized fan relay dimensions allow for rapid installation in tight air handler control cabinets.
- OEM Integrity: Prevents common aftermarket issues like "clicking of death" or premature contact welding under heavy induction loads.
How can I tell if my Lennox 25J38 relay is failing?
Standard diagnostic steps involve checking for 24V at the G-terminal/coil side. If voltage is present but the contacts don't close—or if the fan continues to run when the thermostat is satisfied—the internal contacts are likely pitted or welded.
Will this work in place of a 25J3801?
Yes, the 25J38 is the direct catalog replacement for part number 25J3801 and maintains identical electrical specifications and physical mounting points.
What causes these relays to burn out?
Most failures are due to voltage spikes, excessive motor heat, or mechanical wear of the silver-plated contacts over thousands of cycles.
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.
Original: $39.80
-65%$39.80
$13.93Lennox 25J38 Fan Relay
As a core component for indoor blower control, the Lennox 25J38 Fan Relay is a heavy-duty 24V SPDT (Single Pole Double Throw) switch designed for high-reliability switching in Lennox furnaces and air handlers. Professionals know that when a blower motor relay fails, it typically leads to a "no-air" condition or a fan that runs continuously, potentially straining the motor windings. This OEM Lennox 25038 replacement features a 25A contact rating at 50/60 Hz, providing the robust amperage handling required for varied induction motor loads. The 25J3801 relay is engineered with a compact footprint—measuring approximately 2.35" x 2.53" x 1.36"—allowing for a direct fit on existing control boards or mounting brackets without field modifications. Whether you are dealing with a stuck fan relay or a burnt-out 24V coil, this HVAC blower relay restoration ensures precise thermostat signal response and optimal airflow across the evaporator coil or heat exchanger.
Key Benefits- High Contact Capacity: Rated for 25 Amps, ensuring it can handle the startup inrush current of most residential blower motors.
- Universal SPDT Configuration: Features 24V coil logic to manage single-stage fan speeds or facilitate cross-reference compatibility with various Lennox 25J3801 applications.
- Compact Mechanical Design: The standardized fan relay dimensions allow for rapid installation in tight air handler control cabinets.
- OEM Integrity: Prevents common aftermarket issues like "clicking of death" or premature contact welding under heavy induction loads.
How can I tell if my Lennox 25J38 relay is failing?
Standard diagnostic steps involve checking for 24V at the G-terminal/coil side. If voltage is present but the contacts don't close—or if the fan continues to run when the thermostat is satisfied—the internal contacts are likely pitted or welded.
Will this work in place of a 25J3801?
Yes, the 25J38 is the direct catalog replacement for part number 25J3801 and maintains identical electrical specifications and physical mounting points.
What causes these relays to burn out?
Most failures are due to voltage spikes, excessive motor heat, or mechanical wear of the silver-plated contacts over thousands of cycles.
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.
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Description
As a core component for indoor blower control, the Lennox 25J38 Fan Relay is a heavy-duty 24V SPDT (Single Pole Double Throw) switch designed for high-reliability switching in Lennox furnaces and air handlers. Professionals know that when a blower motor relay fails, it typically leads to a "no-air" condition or a fan that runs continuously, potentially straining the motor windings. This OEM Lennox 25038 replacement features a 25A contact rating at 50/60 Hz, providing the robust amperage handling required for varied induction motor loads. The 25J3801 relay is engineered with a compact footprint—measuring approximately 2.35" x 2.53" x 1.36"—allowing for a direct fit on existing control boards or mounting brackets without field modifications. Whether you are dealing with a stuck fan relay or a burnt-out 24V coil, this HVAC blower relay restoration ensures precise thermostat signal response and optimal airflow across the evaporator coil or heat exchanger.
Key Benefits- High Contact Capacity: Rated for 25 Amps, ensuring it can handle the startup inrush current of most residential blower motors.
- Universal SPDT Configuration: Features 24V coil logic to manage single-stage fan speeds or facilitate cross-reference compatibility with various Lennox 25J3801 applications.
- Compact Mechanical Design: The standardized fan relay dimensions allow for rapid installation in tight air handler control cabinets.
- OEM Integrity: Prevents common aftermarket issues like "clicking of death" or premature contact welding under heavy induction loads.
How can I tell if my Lennox 25J38 relay is failing?
Standard diagnostic steps involve checking for 24V at the G-terminal/coil side. If voltage is present but the contacts don't close—or if the fan continues to run when the thermostat is satisfied—the internal contacts are likely pitted or welded.
Will this work in place of a 25J3801?
Yes, the 25J38 is the direct catalog replacement for part number 25J3801 and maintains identical electrical specifications and physical mounting points.
What causes these relays to burn out?
Most failures are due to voltage spikes, excessive motor heat, or mechanical wear of the silver-plated contacts over thousands of cycles.
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.
