i have a baxi 105e instant. i should explain that i recently had to have a leak in the boiler fixed. the boiler was drained to allow the repair. i have two problems but suspect they may be related.
problem 1) there is air in the system but i am not able to remove it. it bubbles into radiators - sometimes quite noisily - but when i try to bleed the radiator only water comes out; never any air. the air then seems to go on around the system. it bubbles into another rad. and then later into yet another and so on.
problem 2) when the c/h is on the temp. neons on the boiler all light up as expected and after 80C is reached the flame turns off. then ALL temp neons briefly switch off, the 80C neon (temp sensor) flashes a few times and then all neons come back on. there are sometimes variations on this theme but what i have described is the most common one.
is it possible for the trapped air to be causing a problem for the temp. sensor? whatever the answer, can you help me solve these problems?