Ok, bear with me a bit. My son called to say the boiler was leaking. He could not describe it so we went on Skype with his tablet and I saw that the air vent on the top of the boiler was leaking. I had him turn the cap down and it stopped. BUT, he said the water put the fire out!
No no no I said and had him open it up and show me the water inside. I determined that the water was coming in around the gasket between the boiler and the base. Still why did it go out? It had pushed bunch of coal into the bin. I had him relight the stove and told him to call me so we could trouble shoot the stoker or controls. He just called an said he turned it off because the CO detector was going off???? I had assumed the air supply had been cut off so it would not maintain idle, it was 60 there yesterday. The control have not been touched since I was there in 2011. He ran it all last winter with no problems. It has been vacuumed out, he pulled the cleanout lever under the bed, and checked that the blower was running. It was burning but the flame would not advance down the bed, indicating that there was not enough coal being pushed. Why would this make the CO alarm go off? I am going to have him pull up the grates and check the holes, but not sure why this would push fumes back up the hopper. He has got a new batch of coal this year but has been running it for most of Oct.
I had to stop the call as he is dealing with a daughter that is a handful and a 1 year old as his wife is working. Just looking for suggestions.