baxi dhw water problem

[rd80al]

can anyone help got a baxi 105 e with exessive dhw temp gets that hot boiler trips out. anybody got any ideas whats wrong?

 

[gas4you]

Could be several things. Try to explain more precisely when and how this happens.

Do the radiators get extra hot since this fault has occured?

 

[rd80al]

no, just dhw temp high,central heating working fine. i've been told its the thermostat

 

[mrgas]

Anybody fiddled with the gas valve?

 

[namsag]

Does the water coming out the tap stay excessively hot till it trips or does it go hot and cold

 

[rd80al]

nobodys messed with gas valve.hot water stays hot until it trips out

 

[namsag]

Possible Hot water sensor fault just by the plate heat exchanger

 

[steved101]

HW THERMISTOR/SENSOR could be faulty

 

[diverdee]

check sensor is auctaly attached in right place