About a month ago we replaced a heating coil in our water tank and now we started to use the furnace something is causing the fuses to blow out every time we turn the furnace on . Can anyone give me some advise on what to checkout or what to do? :confused:

Going to take more info. Is it a fuse outside the furnace that supplies power to the whole furnace, or one inside that supplies power to the controls. Where are you turning it on, a switch outside the furnace, or at the thermostat. Does it blow as soon as you turn it on or not until the blower or pump starts? Does the system work OK when just heating water?