Lennox 29L43 Collector Box
The Lennox 29L43 Collector Box is a critical OEM component designed for high-efficiency condensing gas furnaces. As a veteran technician, you know that the furnace collector box (also known as the cold end header box) is the primary collection point for combustion condensate before it enters the drain trap. This genuine Lennox replacement part, measuring 16-11/16 x 4 inches, is engineered for a precise fit with the secondary heat exchanger, ensuring that acidic condensate is properly managed without leaking into the furnace cabinet or damaging the combustion air inducer motor.
When diagnosing pressure switch lockout codes, a cracked or clogged collector box is often the culprit. The 29L43 provides a sealed environment to maintain the negative pressure required for the draft, preventing nuisance trips of the furnace pressure switch. Its high-quality, corrosion-resistant construction is built to withstand the constant thermal cycling and chemical exposure of modern heating systems. For a professional-grade repair, verify the condition of the 59L20 collector box gasket and ensure all drainage ports are clear of debris to restore optimal system performance and secondary heat exchanger efficiency.
Key Benefits- OEM Lennox 29L43 ensures exact dimensional compatibility with the secondary heat exchanger.
- Optimizes condensate management to prevent moisture buildup within the inducer housing.
- Maintains critical static pressure levels for consistent burner operation and safety limit compliance.
- Durable, heat-stabilized composite materials prevent premature cracking in high-demand environments.
What causes a Lennox collector box to fail?
Most failures result from thermal stress causing hair-line cracks or internal debris—like scale from the heat exchanger or insects—blocking the narrow pressure switch ports or bottom drain outlets. This leads to water backup and system lockout.
Is the gasket included with the 29L43?
This item typically replaces the main box assembly. Professionals should always inspect the collector box gasket (59L20) and replace it if the seal shows signs of compression set or deterioration to prevent gas leaks.
How do I resolve a pressure switch lockout related to this part?
Verify the slope of the furnace; if the unit is not pitched slightly forward toward the drain, condensate will pool in the box. Ensure the drainage tubes are clear and that the vacuum ports on the box are not obstructed.
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: $291.42
-65%$291.42
$102.00Lennox 29L43 Collector Box
The Lennox 29L43 Collector Box is a critical OEM component designed for high-efficiency condensing gas furnaces. As a veteran technician, you know that the furnace collector box (also known as the cold end header box) is the primary collection point for combustion condensate before it enters the drain trap. This genuine Lennox replacement part, measuring 16-11/16 x 4 inches, is engineered for a precise fit with the secondary heat exchanger, ensuring that acidic condensate is properly managed without leaking into the furnace cabinet or damaging the combustion air inducer motor.
When diagnosing pressure switch lockout codes, a cracked or clogged collector box is often the culprit. The 29L43 provides a sealed environment to maintain the negative pressure required for the draft, preventing nuisance trips of the furnace pressure switch. Its high-quality, corrosion-resistant construction is built to withstand the constant thermal cycling and chemical exposure of modern heating systems. For a professional-grade repair, verify the condition of the 59L20 collector box gasket and ensure all drainage ports are clear of debris to restore optimal system performance and secondary heat exchanger efficiency.
Key Benefits- OEM Lennox 29L43 ensures exact dimensional compatibility with the secondary heat exchanger.
- Optimizes condensate management to prevent moisture buildup within the inducer housing.
- Maintains critical static pressure levels for consistent burner operation and safety limit compliance.
- Durable, heat-stabilized composite materials prevent premature cracking in high-demand environments.
What causes a Lennox collector box to fail?
Most failures result from thermal stress causing hair-line cracks or internal debris—like scale from the heat exchanger or insects—blocking the narrow pressure switch ports or bottom drain outlets. This leads to water backup and system lockout.
Is the gasket included with the 29L43?
This item typically replaces the main box assembly. Professionals should always inspect the collector box gasket (59L20) and replace it if the seal shows signs of compression set or deterioration to prevent gas leaks.
How do I resolve a pressure switch lockout related to this part?
Verify the slope of the furnace; if the unit is not pitched slightly forward toward the drain, condensate will pool in the box. Ensure the drainage tubes are clear and that the vacuum ports on the box are not obstructed.
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 29L43 Collector Box is a critical OEM component designed for high-efficiency condensing gas furnaces. As a veteran technician, you know that the furnace collector box (also known as the cold end header box) is the primary collection point for combustion condensate before it enters the drain trap. This genuine Lennox replacement part, measuring 16-11/16 x 4 inches, is engineered for a precise fit with the secondary heat exchanger, ensuring that acidic condensate is properly managed without leaking into the furnace cabinet or damaging the combustion air inducer motor.
When diagnosing pressure switch lockout codes, a cracked or clogged collector box is often the culprit. The 29L43 provides a sealed environment to maintain the negative pressure required for the draft, preventing nuisance trips of the furnace pressure switch. Its high-quality, corrosion-resistant construction is built to withstand the constant thermal cycling and chemical exposure of modern heating systems. For a professional-grade repair, verify the condition of the 59L20 collector box gasket and ensure all drainage ports are clear of debris to restore optimal system performance and secondary heat exchanger efficiency.
Key Benefits- OEM Lennox 29L43 ensures exact dimensional compatibility with the secondary heat exchanger.
- Optimizes condensate management to prevent moisture buildup within the inducer housing.
- Maintains critical static pressure levels for consistent burner operation and safety limit compliance.
- Durable, heat-stabilized composite materials prevent premature cracking in high-demand environments.
What causes a Lennox collector box to fail?
Most failures result from thermal stress causing hair-line cracks or internal debris—like scale from the heat exchanger or insects—blocking the narrow pressure switch ports or bottom drain outlets. This leads to water backup and system lockout.
Is the gasket included with the 29L43?
This item typically replaces the main box assembly. Professionals should always inspect the collector box gasket (59L20) and replace it if the seal shows signs of compression set or deterioration to prevent gas leaks.
How do I resolve a pressure switch lockout related to this part?
Verify the slope of the furnace; if the unit is not pitched slightly forward toward the drain, condensate will pool in the box. Ensure the drainage tubes are clear and that the vacuum ports on the box are not obstructed.
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.
