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We were recently called to a home in Swimbridge, North Devon, to investigate a Worcester Bosch Greenstar 28i Junior LPG boiler that was intermittently failing to fire. This boiler, around 20 years old, had not been serviced regularly and was showing signs of age-related wear.

What We Found:

During our call-out, we identified several common issues with this particular boiler model:

• 🔧 Blocked condensate trap

• 🔧 Low system pressure

• 🔧 Dirty combustion chamber and corroded ignition electrodes

• 🔧 Non-oxygen barrier pipework causing sludge and corrosion in the system

We carried out a thorough boiler service, cleaned the heat exchanger and combustion chamber, replaced the ignition electrode set, and ensured the system pressure was restored to safe levels. We also gave the homeowner advice on long-term system protection, including:

• ✅ Installing a Fernox magnetic filter

• ✅ Performing a full system flush to remove sludge and prevent future issues

Why Annual LPG Boiler Servicing Is Essential

If you have a Worcester Bosch Greenstar 28i Junior LPG boiler—especially in a rural area like Swimbridge or across North Devon—you may already know they are reliable, but prone to a few age-related issues. Regular servicing helps:

✔ Improve energy efficiency
✔ Prevent expensive breakdowns
✔ Detect early signs of wear
✔ Extend the lifespan of your system
✔ Maintain safety in off-grid or LPG-fed homes

🔧 FAQ: Common Worcester Bosch Greenstar 28i Junior LPG Boiler Issues & Fault Codes

❓ Why won't my Greenstar 28i Junior fire up?

This is often due to dirty electrodes, blocked condensate pipes, or low pressure. A failing PCB or fan could also be to blame.

Fix: Check pressure (should be around 1.5 bar), reset the boiler, and ensure the condensate pipe isn’t frozen or blocked. If the issue persists, it’s time for a professional service.

❓ What does a flashing blue light mean?

A slow flashing blue light usually signals an ignition fault. This could be due to:

• Dirty or damaged electrodes

• Flame sensing issues

• PCB or gas valve faults

Fix: A reset may help, but a service is recommended to check ignition components and combustion performance.

❓ How do I repressurise my 28i Junior?

1. Locate the filling loop under the boiler

2. Slowly open both valves until the pressure reads around 1.5 bar

3. Close both valves and reset the boiler

Tip: If pressure drops frequently, there could be a leak or a problem with the expansion vessel.

❓ Why is my boiler making gurgling or banging noises?

This could be due to air in the system, sludge build-up, or limescale in the heat exchanger.

Fix: Bleed radiators, install a magnetic filter, or consider a system flush.

❓ Should I replace my Worcester Bosch 28i Junior?

This model is now discontinued and parts are becoming harder to source. If your boiler is over 15 years old and frequently breaking down, it may be time to consider a new LPG boiler.

We’re happy to provide advice and competitive quotes on boiler replacements for homes in rural North Devon.

Local Boiler Experts You Can Trust

We specialise in servicing and repairing LPG and oil boilers across:

📍 Swimbridge
📍 South Molton
📍 Barnstaple
📍 Braunton
📍 Winkleigh
📍 Northam

Whether it’s an annual service, a one-off repair, or a full system flush—we’re here to help.

📞 Call now to book your Worcester Bosch LPG boiler service or request a free consultation.
We offer flexible service packages and expert support tailored to rural North Devon homes.