My boiler automatically shuts off when the water gets to low. At first it was happening every couple of days. Then it went to every Day. Now it last about 7 -10 hours before I have to fill it up. I checked the radiators no significant leaks that I can see. Any ideas?
could be your boiler fill valve. check the presure on the boiler, if its less than what your fill is set for, ( 12 pounds +/-) you might need to replace it. Most of them are put on with unions so its an easy swap.
Checked the radiators again. There are two radiators that when i put my finger under the part where the radiator connects to the pipe going through the floor, there is moisture. About the equivalent of a drop or two of water. Is this enough to empty the system to the point it automatically shuts off?