just now the pressure releif valve started blowing out hot water randomly and I dont really know what to do, I shut off the water to the furnce and it stopped. My Dad just passed away last week and he use to do all this, I remember it leaking within the last year a small amount, the bucket it leaed into never had more than a small amount of water in it. I do not remember if he had replaced it or if it just stopped on its own. Also, I do not know if it is reletated but after I turned on the main to the house, the valve that lets water into the heatings system which I was told was on its way out and is suppose to be automatic kept letting water in the system and did not stop until I shut water off to that. Any help would be greatly appreciated!!!