Ruud
Repeated Safety Lockouts
Boiler frequently locks out and must be manually reset at the control
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Intermittent flame sensing, marginal gas pressure, venting issues, failing control board
How to Fix / Troubleshooting
Safety first: Do not repeatedly reset a boiler that locks out without identifying the cause. This can be dangerous.
- Record conditions: Note when lockouts occur (cold start, windy conditions, DHW demand, etc.) to help pinpoint the issue.
- Clean flame sensor and check venting: Perform basic maintenance—clean the flame sensor and ensure vents are clear.
- Check error history: Many Ruud controls store recent fault codes. Access the history to see what is triggering lockouts.
- Schedule professional service: Repeated lockouts indicate an underlying safety or combustion problem that must be addressed by a qualified technician.
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Repair Difficulty
Hard
4/5
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