Right lets talk bearings, I had my oil fired heating serviced by a "qualified engineer". Any way a year later the blower motor was making a row. So I found the parts list and searched fleabay, got a really good bearing guy on there and he told me that ball bearing are graded and the ones they had fitted were not suitable for places that get hot or are running for a long time. So I changed them and it's been brilliant. So could the same be right of the compressor bearings, should you ever need a bearing company BRT at Wisbech are near me(although it's best to know what you want before you call them or ask for a senior sales person). I love to put this other guys name up, it's on the crashed PC. He is very useful .