Worcester cdi greenstar boiler

[igiveituptoyou]

1. Can anyone help with advice please, reasons why pressure would keep increasing? had a WB Greenstar 37cdi fitted approx six years ago, had nothing but probs with it, lot's of new parts fitted - lot's of strong odours/smells coming from it
2. 
   Recently pressure started fluctuating firstly going high - increasing over 2bar then dropping slightly, then rising again then suddenly really dropped, boiler very noisy and kept cutting out - advised to keep re-setting the boiler and keep it topped up, this was done for a few days until leak on pipe found and fixed
   
   Pressure now increasing up into red, with a hot burning powdery soot smell throughout house, boiler temp fluctuating and takes forever to increase/warm up - pressure remains high with low boiler temperature.
   All U9 thru to U0 codes flashed then temp to 99 and back down again - can find no info on codes only to ring WB - rang and told heat exchanger, expansion vessel and PRV?
   Does this mean the heat exchanger is frazzled? what is the guarantee on WB Heat Exchangers
   
   Any expert advice much appreciated
   
   Quote

 

[cross thread]

any smell turn off and get it looked at asap