Lennox 13H78 Relay
The Lennox 13H78 Relay is a heavy-duty 24V DPDT relay engineered for precise switching control within Lennox heating and cooling systems. Built to handle dual-circuit switching, this double pole double throw relay manages various voltage pathways simultaneously, ensuring consistent communication between the thermostat and high-voltage components like blower motors or compressors. Operating at a standard 50/60 Hz frequency, the 13H78 is a critical HVAC OEM replacement part that maintains the electrical integrity of your unit without the risk of chatter or contact pitting common in generic substitutes.
For service technicians, the compact footprint of the Lennox 13H78 allows for seamless integration into tight control panels found in furnace and air handler cabinets. This general purpose relay is the direct Lenox 13H7801 successor, designed to match the original factory specifications for coil resistance and contact ratings. Utilizing an OEM 24 VAC relay ensures that the inductive load switching remains within the designed parameters of the integrated control board, preventing premature component wear and protecting sensitive control circuits from back-EMF spikes during cycle transitions.
Key Benefits
- Dual-Circuit Control: The DPDT configuration allows for the simultaneous management of two independent circuits, essential for complex HVAC sequencing.
- Standard 24V Coil: Compatible with most Lennox 24V control systems, ensuring a drop-in fit for rapid field repairs.
- Frequency Versatility: Engineered to operate reliably on both 50Hz and 60Hz electrical systems for consistent performance across various power grids.
- Genuine OEM Build: Eliminates compatibility issues associated with universal relays, providing the exact mounting and terminal layout required for a professional install.
Common Questions
Can I use a single pole relay to replace the 13H78?
No. The Lennox 13H78 is a Double Pole Double Throw (DPDT) relay. Using a single-pole relay would fail to complete the secondary circuit, meaning your blower or auxiliary components may not engage correctly.
What are the signs that this relay needs replacement?
Technicians should look for audible clicking without circuit closure, visible carbon scoring on the contacts, or a lack of continuity across the poles when 24V is applied to the coil.
Is this part compatible with non-Lennox equipment?
While it is a general purpose 24V relay, it is specifically optimized for Lennox HVAC systems. Always verify the contact amperage and coil voltage against the equipment's wiring diagram before use in other brands.
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: $51.14
-65%$51.14
$17.90Lennox 13H78 Relay
The Lennox 13H78 Relay is a heavy-duty 24V DPDT relay engineered for precise switching control within Lennox heating and cooling systems. Built to handle dual-circuit switching, this double pole double throw relay manages various voltage pathways simultaneously, ensuring consistent communication between the thermostat and high-voltage components like blower motors or compressors. Operating at a standard 50/60 Hz frequency, the 13H78 is a critical HVAC OEM replacement part that maintains the electrical integrity of your unit without the risk of chatter or contact pitting common in generic substitutes.
For service technicians, the compact footprint of the Lennox 13H78 allows for seamless integration into tight control panels found in furnace and air handler cabinets. This general purpose relay is the direct Lenox 13H7801 successor, designed to match the original factory specifications for coil resistance and contact ratings. Utilizing an OEM 24 VAC relay ensures that the inductive load switching remains within the designed parameters of the integrated control board, preventing premature component wear and protecting sensitive control circuits from back-EMF spikes during cycle transitions.
Key Benefits
- Dual-Circuit Control: The DPDT configuration allows for the simultaneous management of two independent circuits, essential for complex HVAC sequencing.
- Standard 24V Coil: Compatible with most Lennox 24V control systems, ensuring a drop-in fit for rapid field repairs.
- Frequency Versatility: Engineered to operate reliably on both 50Hz and 60Hz electrical systems for consistent performance across various power grids.
- Genuine OEM Build: Eliminates compatibility issues associated with universal relays, providing the exact mounting and terminal layout required for a professional install.
Common Questions
Can I use a single pole relay to replace the 13H78?
No. The Lennox 13H78 is a Double Pole Double Throw (DPDT) relay. Using a single-pole relay would fail to complete the secondary circuit, meaning your blower or auxiliary components may not engage correctly.
What are the signs that this relay needs replacement?
Technicians should look for audible clicking without circuit closure, visible carbon scoring on the contacts, or a lack of continuity across the poles when 24V is applied to the coil.
Is this part compatible with non-Lennox equipment?
While it is a general purpose 24V relay, it is specifically optimized for Lennox HVAC systems. Always verify the contact amperage and coil voltage against the equipment's wiring diagram before use in other brands.
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
The Lennox 13H78 Relay is a heavy-duty 24V DPDT relay engineered for precise switching control within Lennox heating and cooling systems. Built to handle dual-circuit switching, this double pole double throw relay manages various voltage pathways simultaneously, ensuring consistent communication between the thermostat and high-voltage components like blower motors or compressors. Operating at a standard 50/60 Hz frequency, the 13H78 is a critical HVAC OEM replacement part that maintains the electrical integrity of your unit without the risk of chatter or contact pitting common in generic substitutes.
For service technicians, the compact footprint of the Lennox 13H78 allows for seamless integration into tight control panels found in furnace and air handler cabinets. This general purpose relay is the direct Lenox 13H7801 successor, designed to match the original factory specifications for coil resistance and contact ratings. Utilizing an OEM 24 VAC relay ensures that the inductive load switching remains within the designed parameters of the integrated control board, preventing premature component wear and protecting sensitive control circuits from back-EMF spikes during cycle transitions.
Key Benefits
- Dual-Circuit Control: The DPDT configuration allows for the simultaneous management of two independent circuits, essential for complex HVAC sequencing.
- Standard 24V Coil: Compatible with most Lennox 24V control systems, ensuring a drop-in fit for rapid field repairs.
- Frequency Versatility: Engineered to operate reliably on both 50Hz and 60Hz electrical systems for consistent performance across various power grids.
- Genuine OEM Build: Eliminates compatibility issues associated with universal relays, providing the exact mounting and terminal layout required for a professional install.
Common Questions
Can I use a single pole relay to replace the 13H78?
No. The Lennox 13H78 is a Double Pole Double Throw (DPDT) relay. Using a single-pole relay would fail to complete the secondary circuit, meaning your blower or auxiliary components may not engage correctly.
What are the signs that this relay needs replacement?
Technicians should look for audible clicking without circuit closure, visible carbon scoring on the contacts, or a lack of continuity across the poles when 24V is applied to the coil.
Is this part compatible with non-Lennox equipment?
While it is a general purpose 24V relay, it is specifically optimized for Lennox HVAC systems. Always verify the contact amperage and coil voltage against the equipment's wiring diagram before use in other brands.
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.
