Common Customer Complaint
If you’re a homeowner experiencing frequent boiler lockouts with your Worcester Greenstar boiler, you’re not alone. One of the most common issues we see across Surrey and London is intermittent lockouts, where the boiler requires manual resets to resume operation.
In this article, we’ll break down the likely causes of intermittent lockout and how our certified engineers can resolve them.
Common Customer Complaint
Symptom:
The boiler keeps going into lockout mode intermittently, requiring the customer to reset it frequently.
Possible Causes
Based on our years of experience servicing Worcester Greenstar boilers, here are some of the likely culprits:
1. Perished Red Seal
• The red seal surrounding the heat cell can deteriorate over time.
• This allows products of combustion to leak into the casing, potentially tripping the overheat stat.
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Tip: Use a flue gas analyser around the seal. Any detection of combustion products here is a fail.
2. Damaged Gas Tube
• The gas tube, particularly around the clip, may become brittle or develop splits.
• This can result in intermittent gas delivery and lockouts.
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Solution: Inspect the gas tube carefully and replace it if any signs of wear or damage are present.
3. Faulty Gas Meter Governor
• A malfunctioning gas meter governor can cause inconsistent gas flow, affecting boiler ignition and performance.
• This is often overlooked but can be a critical issue causing intermittent lockout.
Pro Tip: Economical Repair Option
The most cost-effective way to purchase the heat cell gasket (red seal) is to buy it together with the gas tube as a kit. This ensures you’re replacing both potentially faulty components in one go, saving you time and money.
How We Can Help
At Certificates4UK Ltd, we’ve serviced hundreds of Worcester boilers across Kingston, Richmond, Wimbledon, and surrounding areas. Our Gas Safe engineers are fully equipped to:
• Perform combustion analysis
• Diagnose and replace perished seals and gas tubes
• Test and inspect gas supply and pressure
• Ensure your system is safe, efficient, and reliable
Book a Boiler Inspection Today
If your Worcester Greenstar is experiencing intermittent lockouts, don’t wait for a complete breakdown.
Call us now or book online for fast, reliable boiler diagnostics and repair.
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Call: +007869 520044 or +44 7596 076700
• Email: info@certificates4uk.co.uk or certificates4uk@gmail.com
Certificates4UK Ltd – Your Trusted Local Heating Experts in Surrey & London
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