4Mainer wrote:Okay, so had my NewYorker WC90 installed last Feb, haven't fired the oil boiler since. Burnt wood all thru the summer no sweat. Didn't think it got cold enough last winter to try coal, but I burned some this weekend. Same problem keeping the burn going after 12 hrs. No problem getting it started, unbelievably consistent low maint heat! Left the ash door open, went down a few hrs later. It was glowing inside the firebox, but the stove pipe was just warm. Shut the doors and by morning the coal fire had died. Relit with oak, added a bit 1-3#'s of coal, got the boiler up to temp, now its dying again. Opened ash door hoping it reignites. My 1st experience with coal.
DO you have a damper? Manual or Barometric?
How about a manometer to check draft pressure?
Sounds like you may not be shaking the ash out enough or your draft isn't steady - a manometer would be of great benefit to see what the draft is doing thru the 12 hour burn. These abnormally warm temps outside don't help drafting either. That pipe should be getting hot with the ash pan door open for 20 minutes if you are clearing ash good and have a good draft. And as mentioned above, fill that firebox to the top of the firebrick. Coal likes a deep bed. I run mine 12-14 inches deep.
Here is a good thread on shake down and reloading Shaking Down/Reloading A Mature Fire