How To Tell If Ceramic Fuse Is Bad

Many electronic devices use fuses to limit the amount of current that goes through a circuit.

How to tell if ceramic fuse is bad.

A microwave oven is prone to short circuiting caused by severe voltage fluctuations. If the fuse is good the test light will light up on both sides of the fuse. Step 2 set an ohmmeter or multimeter dial to zero. If the appliance has a plug unplug the power cord.

Fuses come in many types and sizes including glass fuses which may be slow blow fuses or fast acting fuses. Step 1 turn off the power supply to the appliance or other electrical device if the device is hard wired. Regarding car fuses most cars use a colored blade type fuse and looking at the top of the fuse in situ in the fuse box will show that the metal strip that runs along the visible top of the fuse will either be intact fuse good or broken fuse blown. If you have glass fuse you can easily see if fuse is burned or not for ceramic types you will need continuity checker multimeter ohmmeter for continuity checker put fuse on black and red lead and if you hear beep than your fuse is ok if theres no beep fuse is burned for multimeter ohmmeter set multimeter to ohm setting closest to 1ω and put one lead on each end of the fuse and look at the.

Use a computer safe test light preferably one with an led light as probing unknown fuses with an older style test light may draw excessive current. Along with glass fuses ceramic fuses are among the most commonly used fuses in household electrical appliances. Testing a ceramic fuse is the only way to tell if the fuse has blown. This includes microwave ovens.

If you test a fuse for the airbag it may deploy. If too much current flows through a circuit a fuse is designed. It s essential that you replace a blown fuse with another of the same type. Multimeters read both volts and ohms.