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6/25/20252 min read


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:
๐ง Blocked condensate trap
๐ง Low system pressure
๐ง Dirty combustion chamber and corroded ignition electrodes
๐ง 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:
โ Installing a Fernox magnetic filter
โ 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 boilerโespecially in a rural area like Swimbridge or across North Devonโyou may already know they are reliable, but prone to a few age-related issues. Regular servicing helps:
โ Improve energy efficiency
โ Prevent expensive breakdowns
โ Detect early signs of wear
โ Extend the lifespan of your system
โ Maintain safety in off-grid or LPG-fed homes
๐ง FAQ: Common Worcester Bosch Greenstar 28i Junior LPG Boiler Issues & Fault Codes
โ 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 isnโt frozen or blocked. If the issue persists, itโs time for a professional service.
โ 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.
โ How do I repressurise my 28i Junior?
Locate the filling loop under the boiler
Slowly open both valves until the pressure reads around 1.5 bar
Close both valves and reset the boiler
Tip: If pressure drops frequently, there could be a leak or a problem with the expansion vessel.
โ 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.
โ 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.
Weโre 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:
๐ Swimbridge
๐ South Molton
๐ Barnstaple
๐ Braunton
๐ Winkleigh
๐ Northam
Whether itโs an annual service, a one-off repair, or a full system flushโweโre here to help.
๐ 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.
Services
Aga & Rayburn servicing
Boiler servicing
Boiler installation
Central heating repairs
Hot water tank installation
General plumbing
Address
Jad Mottram Plumbing and Heating
5 Taw View
Chittlehamholt
Umberleigh
North Devon
Ex37 9PA
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Contact us
01769 540743
07933166664
jadmottram@hotmail.com