I am a fairly new homeowner [ by 1 year] and have never delt with furnaces before neither did my husband. Our furnace is hooked up as well to the central air conditioner.. anyway recently there was alot of water on the floor by the furnace and hot water tank and we thought it was the tank then this loud buzzing now has started it buzzes real loud every 3 min. or so and there is water [ moldy I think] pooling on the side anyway I have turned off the air [ not the furnace] and the noise is still there, does anyone know what this is and how serious it is I am worried that our house will blow up or something [ it is gas] any help would be great, thanks. Also should I turn off the furnace itself? I am dying here with the heat and would really like to be able to run the conditioner.