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Latest update :- Managed to stop the boiler tripping out on overtemp but I don't know why it was doing it. After swapping both the boiler & overtemp thermostats the problem was still the same, so I looked at the radiator in the small front bedroom, this is the 1st radiator in the line from the...

No I haven't swapped it yet, i wanted to make sure it was safe to put the new one in the new position as the overheat thermostat is what prevents the boiler from overheating. incedentally, the new overheat thermostat kit comes with TWO new thermostat sensors, either which fit onto the output...

Have just bought a replacement overtemp thermostat for my boiler just incase the one on it was faulty, was just about to swap it when i noticed that the instructions which came with the one supplied show that it should be fitted on the output pipe on the boiler, it also shows this in the service...

Hi, Thanks for the reply. If air is getting into, or was in the system already, wouldn't this show itself by 1 or more radiators not getting hot? as it is at the moment, all the radiators get hot very quickly as soon as the central heating fires up.

Looks like the problem has returned, even with four of the thermostatic radiator valves removed, the boiler has worked flawlessly all through summer heating up the hot water alone, but now as it is getting colder my central heating has come on and it has been tripping out on overtemp again. It...

Looks like the problem has returned, even with four of the thermostatic radiator valves removed, the boiler has worked flawlessly all through summer heating up the hot water alone, but now as it is getting colder my central heating has come on and it has been tripping out on overtemp again. It...

Problem Solved, removed four of the thermostatic radiator valve heads, (the ones that are always turned up full anyway), and the boiler has not tripped out since. Thanks for all the help.

Thanks for the replies, ALL the radiators in the house have thermostatic valves on them but most are set to their max. My next step is going to be to replace one of these for just a normal valve and see if that makes any difference. The pump speed was turned down about two years ago as i was...

Can anyone help, my Baxi Solo 2 PF40 boiler has started to shut down with the overheat lamp lit. This happens after the boiler has been running for at least 8 hours. Once reset, it will run again for a number of hours before tripping out again, any idea where i should start looking ? Thanx...