mal91152 wrote:When I run my Stelrad boiler on nut coal or pea coal the ashes do not drop down, they need to be proded, then they drop fine.
This is a problem common to all the stoves & coal I have ever used, after the fire has been running for about a week. It's called "bridging" & the top of the firebed acts like the crust of a cake. You can shake down & accomplish nothing but mainly moving air below the crust .(brfdge) My procedure is to poke down into the top of the bed (in a number of places) after I have livened up the fire by opening the ash door for a few minutes. Often times, when you poke down, you will see the crust collapse into the air pocket below the crust & then you can shake it down & have room for fresh coal to fill the air pocket. Sounds like you are already doing that so just keep it as part of your normal procedure.