Advice please on Biasi Boiler Lock Out Mode!!? I have a Biasi Combi boiler, 15 months out-of-date, I leave it...

I have a Biasi Combi boiler, 15 months out-of-date, I leave it run on constant (low) through the winter days and night, turn it up when we get home from work....trouble is, its started to ''Lock Out'' on us. So, we get up up to or come home to a cold house !! It seems that if the outside temp drops and we dont ask for more bake, it shuts down and locks out. After turning it off and pressing the reset button it WILL fire up, other times it wont and we hold to leave it for 20 mins or so previously it will respond to demand. It seem to prefer running on a higher setting and we dont bring back the problem, but who wants to be burning adjectives that gas and sweltering to !! Anyone got a Biasi and have this problem? Can anyone explain to me what happens and also we enjoy rad thermostats and NO room thermostat, is this right?...dont the rad thermo's tell the boiler to preserve running?...would really apreciatte an answer and perhaps your expertise?.....Many Thanks a shivering Yahoo'r.....
I enjoy propane within my home. I...
Answers:    A am not used to with that butner, but duplicate thing happen to me about 3 weeks ago. I CALLED THE FURNACE service, and he found out I have a hole in a nurture line.