Lennox 20W33 Rollout Switch
Keep your heating systems running within safe operational parameters with the Lennox 20W33 Rollout Switch. This critical OEM safety component is a manual reset flame rollout switch designed to detect abnormal heat or flame rollout conditions within the burner assembly. Engineered with a single pole, single throw (SPST) circuit, the switch is calibrated for a 340 degrees F actuation point (+/- 16°F tolerance). When temperatures exceed this threshold, the internal disk snaps open to break the 24V control circuit, immediately shutting down the gas valve to prevent damage to the heat exchanger and surrounding furnace components. As a veteran-grade HVAC rollout limit switch, the 20W33 features an open-face design and is indexed for select Lennox packaged units and furnaces, including the KGA and KGB series. Replacing a tripped 100811-01 limit control is straightforward for field technicians using standard 1/4-inch nut drivers, but always ensure the underlying cause of the rollout—such as a cracked heat exchanger or blocked flue—is fully diagnosed before resetting the high-limit button.
Key Benefits
- OEM Precision: Guaranteed compatibility with Lennox equipment, replacing part numbers 20W33, 100811-01, and 20W3301 for reliable system integration.
- High-Temperature Protection: Reliable 340-degree F limit protection ensures the system fails safe during combustion disturbances or overheating events.
- Manual Reset Security: The manual reset mechanism requires a physical inspection of the unit, preventing the furnace from auto-cycling under dangerous conditions.
- Contractor Grade Durability: Rated for 10 Amp at 24V, these SPST rollout switches are built to withstand the high-temperature environments of professional combustion chambers.
Common Questions
How do I troubleshoot a Lennox rollout switch trip?
If the 20W33 switch has tripped, first check for obstructions in the venting system, soot buildup on the burners, or signs of a compromised heat exchanger. Use a multimeter to test for continuity across the terminals; an open circuit on a switch that hasn't exceeded its 340F rating indicates a faulty component that requires replacement.
What Lennox models are compatible with the 20W33?
This Lennox furnace rollout switch is commonly found in KGA024 through KGA090 and KGB048 series units, as well as various LGH commercial packaged models. Always verify the specific temperature rating on the existing switch before installation.
Can I bypass this switch for testing purposes?
Never bypass a flame rollout limit switch in a live system. These are primary safety devices. If the switch trips, it is performing its designed function to protect the structure from fire hazards and carbon monoxide leaks.
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: $21.69
-65%$21.69
$7.59Lennox 20W33 Rollout Switch
Keep your heating systems running within safe operational parameters with the Lennox 20W33 Rollout Switch. This critical OEM safety component is a manual reset flame rollout switch designed to detect abnormal heat or flame rollout conditions within the burner assembly. Engineered with a single pole, single throw (SPST) circuit, the switch is calibrated for a 340 degrees F actuation point (+/- 16°F tolerance). When temperatures exceed this threshold, the internal disk snaps open to break the 24V control circuit, immediately shutting down the gas valve to prevent damage to the heat exchanger and surrounding furnace components. As a veteran-grade HVAC rollout limit switch, the 20W33 features an open-face design and is indexed for select Lennox packaged units and furnaces, including the KGA and KGB series. Replacing a tripped 100811-01 limit control is straightforward for field technicians using standard 1/4-inch nut drivers, but always ensure the underlying cause of the rollout—such as a cracked heat exchanger or blocked flue—is fully diagnosed before resetting the high-limit button.
Key Benefits
- OEM Precision: Guaranteed compatibility with Lennox equipment, replacing part numbers 20W33, 100811-01, and 20W3301 for reliable system integration.
- High-Temperature Protection: Reliable 340-degree F limit protection ensures the system fails safe during combustion disturbances or overheating events.
- Manual Reset Security: The manual reset mechanism requires a physical inspection of the unit, preventing the furnace from auto-cycling under dangerous conditions.
- Contractor Grade Durability: Rated for 10 Amp at 24V, these SPST rollout switches are built to withstand the high-temperature environments of professional combustion chambers.
Common Questions
How do I troubleshoot a Lennox rollout switch trip?
If the 20W33 switch has tripped, first check for obstructions in the venting system, soot buildup on the burners, or signs of a compromised heat exchanger. Use a multimeter to test for continuity across the terminals; an open circuit on a switch that hasn't exceeded its 340F rating indicates a faulty component that requires replacement.
What Lennox models are compatible with the 20W33?
This Lennox furnace rollout switch is commonly found in KGA024 through KGA090 and KGB048 series units, as well as various LGH commercial packaged models. Always verify the specific temperature rating on the existing switch before installation.
Can I bypass this switch for testing purposes?
Never bypass a flame rollout limit switch in a live system. These are primary safety devices. If the switch trips, it is performing its designed function to protect the structure from fire hazards and carbon monoxide leaks.
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
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Description
Keep your heating systems running within safe operational parameters with the Lennox 20W33 Rollout Switch. This critical OEM safety component is a manual reset flame rollout switch designed to detect abnormal heat or flame rollout conditions within the burner assembly. Engineered with a single pole, single throw (SPST) circuit, the switch is calibrated for a 340 degrees F actuation point (+/- 16°F tolerance). When temperatures exceed this threshold, the internal disk snaps open to break the 24V control circuit, immediately shutting down the gas valve to prevent damage to the heat exchanger and surrounding furnace components. As a veteran-grade HVAC rollout limit switch, the 20W33 features an open-face design and is indexed for select Lennox packaged units and furnaces, including the KGA and KGB series. Replacing a tripped 100811-01 limit control is straightforward for field technicians using standard 1/4-inch nut drivers, but always ensure the underlying cause of the rollout—such as a cracked heat exchanger or blocked flue—is fully diagnosed before resetting the high-limit button.
Key Benefits
- OEM Precision: Guaranteed compatibility with Lennox equipment, replacing part numbers 20W33, 100811-01, and 20W3301 for reliable system integration.
- High-Temperature Protection: Reliable 340-degree F limit protection ensures the system fails safe during combustion disturbances or overheating events.
- Manual Reset Security: The manual reset mechanism requires a physical inspection of the unit, preventing the furnace from auto-cycling under dangerous conditions.
- Contractor Grade Durability: Rated for 10 Amp at 24V, these SPST rollout switches are built to withstand the high-temperature environments of professional combustion chambers.
Common Questions
How do I troubleshoot a Lennox rollout switch trip?
If the 20W33 switch has tripped, first check for obstructions in the venting system, soot buildup on the burners, or signs of a compromised heat exchanger. Use a multimeter to test for continuity across the terminals; an open circuit on a switch that hasn't exceeded its 340F rating indicates a faulty component that requires replacement.
What Lennox models are compatible with the 20W33?
This Lennox furnace rollout switch is commonly found in KGA024 through KGA090 and KGB048 series units, as well as various LGH commercial packaged models. Always verify the specific temperature rating on the existing switch before installation.
Can I bypass this switch for testing purposes?
Never bypass a flame rollout limit switch in a live system. These are primary safety devices. If the switch trips, it is performing its designed function to protect the structure from fire hazards and carbon monoxide leaks.
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.
