I went to a boiler breakdown last week,i found the main heat exchanger had pin hole in. I couldnt fill and see if water has done damage to electrics so i put internal leak sealer and i put self tapper in pin hole and it stopped the leak . I found hot water ok but heating fired but the hot water pipe got hot then cut out. I took plate heat ex out and flushed it out and it was great heat and water. I got a recon heat ex ans its all ok ,i just used a screw to fill up and test boiler. COWBOY I AM YEEE HAAAA GET ON UR HORSE AND DRINK UR MILK
