I have an older Bryant gas boiler that won't keep the pilot lit. I also have
a spare boiler for parts (it started leaking). We already changed the pilot
assembly because the flame was weak. It improved significantly. But after
three weeks, the flame goes out unexpectedly. After lighting, it goes for a
while, then next day is out again. Re-lite, it goes for another day. Does
this sound like the control valve? I could swap this with the other unit.
What else could be hapening? There is no draft causing it to be blown out.