A full strip-down service on a Worcester Greenstar 28i Junior in Bordesley Green. We replaced the worn burner gasket and brought the minimum-rate combustion back into tolerance, but the baffle was damaged and the fan was extremely noisy, so we left the boiler At Risk with a quote for the repair.
On Wednesday 4 November we carried out a full strip-down service on a Worcester Greenstar 28i Junior in Bordesley Green. The boiler was not in the best of condition. With the burner out, the baffle inside the heat exchanger was damaged, and the burner gasket was worn, so we replaced the gasket. The fan was also extremely noisy. On the analyser, the combustion at minimum rate was well out of tolerance at 7.4% CO2; we adjusted it to 9.0%. We classified the boiler At Risk, explained the parts it needs to the customer, and left a quote for the repair work: a new baffle and a new fan.
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Basic service £95, intermediate £125, full strip-down £185.
No travel charge within 10 miles of B20 2JS. Further out, £2 per mile may apply — always agreed before anything is booked. Full price list
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On Wednesday 4 November we carried out a full strip-down service on a Worcester Greenstar 28i Junior in Bordesley Green. The boiler was not in the best of condition.
With the burner out, the baffle inside the heat exchanger was corroded and burnt through at the edge, as you can see in the second and third photos. The burner gasket was worn, so we replaced it on the day. The fan was also extremely noisy.
On our flue gas analyser, the combustion at minimum rate was well out of tolerance, at 7.4% CO2. We adjusted it to 9.0%; the last two photos show the readings before and after.
We classified the boiler At Risk, explained to the customer the parts it needs, and left a quote for the repair work: a new baffle and a new fan. Our boiler servicing page explains the different levels of service, and our Worcester boiler repair page covers Worcester faults.
A full strip-down service is £185, which includes gaskets and an inhibitor top-up. Repairs found on a service are quoted separately before any work is done. Details are on our price list.
It means the installation is not an immediate danger to life or property, but it has the potential to become one. The engineer explains the risk, recommends turning the appliance off until the fault is put right and, with your permission, does so. Either way you are left a written warning notice that lists the fault and what is needed to fix it.
The baffle sits inside the heat exchanger. On this boiler it was corroded and burnt through at the edge, so it is on the quote for replacement.
At minimum rate the analyser read 7.4% CO2, which was well out of tolerance. We adjusted it to 9.0% and checked the readings again.
A full strip-down service is £185, which includes gaskets and an inhibitor top-up. Repairs found on a service are quoted separately, as they were here.
Job attended and photographed by our engineers, November 2026. Written up by Saeed Iqbal, the engineer who leads Synergy Gas & Plumbing (Gas Safe registered 594385). More of our work in the city is on our Birmingham page, and every job we write up is on the case studies index.
From £95
Basic service £95, intermediate £125, full strip-down £185.
No travel charge within 10 miles of B20 2JS. Further out, £2 per mile may apply — always agreed before anything is booked.
What a full strip-down actually involves, photographed as we went: fan and burner out, burner door and heat exchanger cleaned, gaskets replaced. Then a walk round the house to bleed every radiator.
Read the case studyThe analyser was off the top of its scale at the start of the service. A fouled heat exchanger was the cause. Full strip-down, cleaned, and 112 ppm at the end.
Read the case studyThe right-hand manifold inside a Worcester Greenstar 28i Junior was leaking. We diagnosed it, tracked the part down locally, fetched it and fitted it the same day. Customer extremely happy.
Read the case studyBasic £95, intermediate £125, full strip-down £185. Radiators bled on every visit.
