This Worcester/Bosch Heat-slave combi is 14 years old and has been serviced every year without fail.
In January it developed a smell of unburnt oil, not a strong smell but enough to make the Utility room smell. It was worse first thing in the morning and went away when used for an hour or so.
We bought its annual service forward a couple of months and got the Service engineer to investigate. He gave it a full service but could find no evidence of any leak or any history marks or stains. Apart from the normal fitting of a new spray nozzle, he also fitted a long-life oil hose and a new auto air vent in an effort to stop any minor escape. The smell went for a few days and then returned.
The engineer came back and again went through everything in detail in the boiler, the fuel tank and all the pipes, but again no clues. He fitted a new fuel pump in the hopes the old one may have developed a problem in the solenoid cutting off the fuel and also a new seal around the baffle cover “just in case”. Again fine for a few days and then the smell came back.
Any ideas or suggestions would be much appreciated.
In January it developed a smell of unburnt oil, not a strong smell but enough to make the Utility room smell. It was worse first thing in the morning and went away when used for an hour or so.
We bought its annual service forward a couple of months and got the Service engineer to investigate. He gave it a full service but could find no evidence of any leak or any history marks or stains. Apart from the normal fitting of a new spray nozzle, he also fitted a long-life oil hose and a new auto air vent in an effort to stop any minor escape. The smell went for a few days and then returned.
The engineer came back and again went through everything in detail in the boiler, the fuel tank and all the pipes, but again no clues. He fitted a new fuel pump in the hopes the old one may have developed a problem in the solenoid cutting off the fuel and also a new seal around the baffle cover “just in case”. Again fine for a few days and then the smell came back.
Any ideas or suggestions would be much appreciated.