Laars Error 110: SLT High Limit Lockout
The safety limit thermostat (high-limit) opened, indicating an overheat condition. The Mascot HT locks out the burner to protect the boiler. We diagnose and repair it across Greater Vancouver — same-day and after-hours.
The safety limit thermostat (high-limit) opened, indicating an overheat condition. The Mascot HT locks out the burner to protect the boiler.
Laars fault codes can vary by model and series. Use this as a guide — the same code can have more than one cause. Our Technical Safety BC–licensed technicians read the code, confirm it against your unit's manual, and diagnose the true cause before any repair.
Likely causes of Laars error 110
- Loss of water circulation (pump fault, air, or closed valves)
- Low system water pressure
- Faulty or open high-limit thermostat
- Restricted heat exchanger flow / scale buildup
- Failed control
What you can safely check
- Check the system pressure gauge is in the normal range
- Make sure heating zone valves are open and let the boiler cool before resetting
Beyond these checks, do not open the unit or touch gas/electrical parts — BC law requires a licensed gas fitter. Call us for a proper diagnosis.
Error 110 usually leaves you without heat or hot water and can indicate a safety-related fault. Don't keep resetting it — call for priority after-hours Laars repair.
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Parts often behind Laars error 110
Genuine Laars parts we supply and professionally install — never for DIY.
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Laars Error 110 Repair Across Metro Vancouver
Related Laars Safety & Overheat Codes
Frequently Asked Questions
Fix Laars Error 110 Today
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