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Hi I am also having problems with my vokera syntesi 35 locking out code 08 every 20 mins. Ive had thermistor changed on it but problem still there. Also now pressure has dropped. Gas man said he will change pressure valve and it may work but no guarantee. Hes using process of elimination...

Hi I am having problems with my boiler vokera syntesi 35. I has been locking out code 08. I had the thermistor changed on it but its still locking out. it now developed another problem the pressure keeps dropping. The chap who fitted thermistor said changing pressure valve and a service MAY...