hi.. i have an ideal classic LX & FF50 boiler and the overheat reset stat is regularly cutting out every couple of days. I changed the boiler thermostat to low setting but did not stop the o/heat stat cutting out. I initially assumed it was a faulty boiler stat. as would expect that to operate before the o/heat stat. but there are days when the boiler runs normally with no issue, but I guess it could be an intermittent stat issue. I have also had one specific radiator which gets an airlock...Have bled it regularly but does not seem to cure the issue..... Have also had a couple of occasions with pipes banging in the airing cupboard which i am guessing is the 'kettling' scenario. Not sure if its a straight forward boiler stat problem...or if the air getting into the system is a cause.... Any help for a newbie would be appreciated...