Reading Flame Safeguard Lockout Codes the Right Way
When your burner shuts down on a flame failure, your first instinct is to hit reset — but that could introduce unburned gas into the combustion chamber. Here's what to do instead.
Jude walks through a real lockout 9 fault on a flame safeguard, explains what 'flame detected in standby' actually means, and shows a step-by-step troubleshooting process — including how to use the Honeywell four-line display and how to identify a failed flame scanner before it causes a dangerous situation.
Blindly resetting a flame safeguard lockout without troubleshooting can mask a failed scanner, a leaking gas valve, or carbon buildup — any of which can lead to unburned gas in the combustion chamber and serious damage.
WARE's technicians troubleshoot flame safeguard issues daily across rental, service, and startup work — this is the kind of practical knowledge that keeps boilers running safely and plants out of trouble.
Need parts, a flame scanner, or a troubleshooting resource? Visit boilerwarehouse.com or wareinc.com to talk to someone who knows boilers.
Link to the Honeywell Burner Control seen in this video can be found here: https://www.boilerwarehouse.com/products/honeywell-rm7800l1053#/
Timestamps:
0:00 - Don't Just Hit Reset: Flame Failure Lockouts Explained
0:17 - Lockout 9: Flame Detected in Standby
0:35 - What the Instruction Manual Tells You
1:13 - Using the Honeywell Four-Line Display for Troubleshooting
1:41 - Checking the Combustion Chamber, Wiring, and Amplifier
2:56 - Pulling the Scanner to Confirm a Faulty Detector
3:19 - Why This Step Matters for Safety
Related search terms:
flame safeguard lockout codes, burner lockout 9 fault, flame detected in standby troubleshooting, Honeywell flame safeguard display, flame scanner malfunction, how to troubleshoot a burner lockout, flame safeguard reset procedure, industrial burner flame failure, UV flame scanner fault, boiler burner won't stay lit
Related Search Q&A:
What does lockout 9 mean on a flame safeguard?
Lockout 9 typically means the flame safeguard detected a flame signal during standby, when no flame should be present. This can indicate a leaking gas valve, carbon buildup in the combustion chamber, or a failed flame scanner.
Should I just reset a burner lockout and see if it runs?
Not without troubleshooting first. Resetting without diagnosing the cause can mask a serious problem — including a faulty scanner that could allow unburned gas to enter the combustion chamber.
How do I know if my flame scanner is bad?
Pull the scanner from the burner and shield it from light sources. If it still shows a flame signal with no flame present, the scanner has malfunctioned and needs to be replaced.
What is the Honeywell four-line display used for?
The Honeywell four-line display puts the fault code details and basic troubleshooting steps directly on screen, eliminating the need to cross-reference a printed instruction manual in the field.
What causes a false flame signal in a boiler burner?
Common causes include a failed UV flame scanner, carbon buildup or a clinker glowing in the combustion chamber, a leaking gas valve, or wiring interference near the scanner leads.
Learn more about WARE boiler service, rentals, training, and support: https://www.wareinc.com
Want boiler training? Learn more about Boiler University and boiler operator education through http://www.boileruniversity.com
🔔 Subscribe for weekly boiler tips and deep dive technical content.
👍Like & share to help us elevate the steam industry.
👍If you found this helpful, like, subscribe, and leave your boiler questions in the comments.
© 2026 @wareboilers. All rights reserved. Unauthorized reproduction or distribution of this content is prohibited. Ware Boilers’ videos are intended for promotional purposes only and does not constitute professional advice. Please contact our boiler professionals via https://www.wareinc.com/ with specific questions or repair needs. You should not attempt any boiler repair or modification without first consulting with a licensed contractor and the manufacturer. Ware Boilers does not warrant the accuracy, completeness, or usefulness of information available on this YouTube page. Nothing contained in or provided in any of Ware Boilers’ videos is intended to constitute advice or to serve as a substitute for a licensed contractor’s inspection or manufacturer specifications. Any reliance you place on such information is strictly at your own risk.
Jude walks through a real lockout 9 fault on a flame safeguard, explains what 'flame detected in standby' actually means, and shows a step-by-step troubleshooting process — including how to use the Honeywell four-line display and how to identify a failed flame scanner before it causes a dangerous situation.
Blindly resetting a flame safeguard lockout without troubleshooting can mask a failed scanner, a leaking gas valve, or carbon buildup — any of which can lead to unburned gas in the combustion chamber and serious damage.
WARE's technicians troubleshoot flame safeguard issues daily across rental, service, and startup work — this is the kind of practical knowledge that keeps boilers running safely and plants out of trouble.
Need parts, a flame scanner, or a troubleshooting resource? Visit boilerwarehouse.com or wareinc.com to talk to someone who knows boilers.
Link to the Honeywell Burner Control seen in this video can be found here: https://www.boilerwarehouse.com/products/honeywell-rm7800l1053#/
Timestamps:
0:00 - Don't Just Hit Reset: Flame Failure Lockouts Explained
0:17 - Lockout 9: Flame Detected in Standby
0:35 - What the Instruction Manual Tells You
1:13 - Using the Honeywell Four-Line Display for Troubleshooting
1:41 - Checking the Combustion Chamber, Wiring, and Amplifier
2:56 - Pulling the Scanner to Confirm a Faulty Detector
3:19 - Why This Step Matters for Safety
Related search terms:
flame safeguard lockout codes, burner lockout 9 fault, flame detected in standby troubleshooting, Honeywell flame safeguard display, flame scanner malfunction, how to troubleshoot a burner lockout, flame safeguard reset procedure, industrial burner flame failure, UV flame scanner fault, boiler burner won't stay lit
Related Search Q&A:
What does lockout 9 mean on a flame safeguard?
Lockout 9 typically means the flame safeguard detected a flame signal during standby, when no flame should be present. This can indicate a leaking gas valve, carbon buildup in the combustion chamber, or a failed flame scanner.
Should I just reset a burner lockout and see if it runs?
Not without troubleshooting first. Resetting without diagnosing the cause can mask a serious problem — including a faulty scanner that could allow unburned gas to enter the combustion chamber.
How do I know if my flame scanner is bad?
Pull the scanner from the burner and shield it from light sources. If it still shows a flame signal with no flame present, the scanner has malfunctioned and needs to be replaced.
What is the Honeywell four-line display used for?
The Honeywell four-line display puts the fault code details and basic troubleshooting steps directly on screen, eliminating the need to cross-reference a printed instruction manual in the field.
What causes a false flame signal in a boiler burner?
Common causes include a failed UV flame scanner, carbon buildup or a clinker glowing in the combustion chamber, a leaking gas valve, or wiring interference near the scanner leads.
Learn more about WARE boiler service, rentals, training, and support: https://www.wareinc.com
Want boiler training? Learn more about Boiler University and boiler operator education through http://www.boileruniversity.com
🔔 Subscribe for weekly boiler tips and deep dive technical content.
👍Like & share to help us elevate the steam industry.
👍If you found this helpful, like, subscribe, and leave your boiler questions in the comments.
© 2026 @wareboilers. All rights reserved. Unauthorized reproduction or distribution of this content is prohibited. Ware Boilers’ videos are intended for promotional purposes only and does not constitute professional advice. Please contact our boiler professionals via https://www.wareinc.com/ with specific questions or repair needs. You should not attempt any boiler repair or modification without first consulting with a licensed contractor and the manufacturer. Ware Boilers does not warrant the accuracy, completeness, or usefulness of information available on this YouTube page. Nothing contained in or provided in any of Ware Boilers’ videos is intended to constitute advice or to serve as a substitute for a licensed contractor’s inspection or manufacturer specifications. Any reliance you place on such information is strictly at your own risk.
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