This 5 Amp, 20mm control board fuse is located on the backside of your Harman Stove Circuit board. All units made after 2013, with controllers Revisions E and up, use this shorter fuse.
Most stoves and inserts made prior to 2013, with auto ignition, Revisions E and under, will use a 30mm 6 Amp fuse, 3-20-49447. Pre 2013 without an igniter will use a 30mm 5 Amp fuse, part 3-20-49446.
Before ordering a fuse, unplug your unit, remove your fuse from your controller and measure the length.
- All 30mm fuses (1.1811″) in stoves without an igniter are 5 Amp.
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All 30mm fuses (1.1811″) in stoves with an igniter are 6 Amp.
- All 20mm fuses (0.787402″) are 5 Amps.
- Sometimes controllers have been replaced since your stove was installed, your actual fuse type may be different the controller was updated.
Check out the TROUBLESHOOTING tab regarding fuses.