No display / dead (blown fuse)

Furrion Microwave: “No display / dead (blown fuse)”

warning RV microwave problems

Safety Microwaves contain a high-voltage capacitor and magnetron that can hold a lethal charge even when unplugged. Do NOT open the cabinet or probe internal components unless you are trained to discharge the capacitor. Replacing the internal fuse or door switches generally means removing the unit and opening it, which is high-voltage work best left to a qualified technician.

What it means

Furrion RV over-the-range convection microwaves (FMCM15 series) do NOT show numeric error codes; their manual uses a problem/solution table. The most common hard fault is a completely dead unit with no display, typically caused by a blown internal fuse, very often triggered by a failing door interlock switch.

Most likely causes

Failed or misaligned door interlock/monitor switch shorting and blowing the internal fuse most likely
Blown internal line fuse (located at the upper-right rear of the FMCM15SS; unit must be removed to access) common
Loss of 120V AC supply: tripped breaker, GFCI, or no shore/generator power common
Loose or disconnected power cord/connection behind the unit less common

Safe checks you can do yourself

Confirm the RV is on 120V AC (shore or generator) and the microwave's breaker/GFCI is not tripped.
Test another 120V outlet or appliance on the same circuit to confirm power is present.
If you have access and are qualified, with power disconnected, check the internal fuse for continuity with a multimeter (no continuity = blown).
Inspect the door and latch: a door that must be bumped or lifted to register as closed points to a failing interlock switch.
Reseat the power connection behind the unit if accessible.

How to reset / clear No display / dead (blown fuse)

Unplug or switch off the microwave's circuit and wait a few minutes.
Restore power and try again.
If the fuse blew, replacing it without fixing a faulty door switch will usually blow the new fuse again, so address the door switch first.

When to call a technician

Call a qualified appliance/RV technician for any internal fuse, door-switch, or magnetron work, or if the unit repeatedly blows fuses. Replace the whole unit if internal repair is not economical.

Applies to

FMCM15-SS · FMCM15-BL · FMCM15SS · Furrion over-the-range RV convection microwave

FAQ

What does Furrion Microwave code "No display / dead (blown fuse)" mean?

How do I reset Furrion Microwave No display / dead (blown fuse)?

Unplug or switch off the microwave's circuit and wait a few minutes. Restore power and try again. If the fuse blew, replacing it without fixing a faulty door switch will usually blow the new fuse again, so address the door switch first.

What is the most common cause of No display / dead (blown fuse) on a Furrion Microwave?

The most likely cause is failed or misaligned door interlock/monitor switch shorting and blowing the internal fuse.

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Sources

Troubleshooting and Fuse Location on Furrion Over the Range RV Convection Microwave — Internal fuse location (upper-right rear, FMCM15SS) and removal requirement (etrailer.com)
Furrion FMCM15-SS Convection Microwave Troubleshooting/repair help — Door interlock switch as common cause of blown fuse (Grand Design Owners Forums)
Furrion FMCM15-BL Instruction Manual, Troubleshooting — OEM problem/solution troubleshooting table (no error codes) (Furrion (via ManualsLib))

Note: The Furrion FMCM15 manual uses a problem/solution table and lists NO numeric error codes. 'Unit won't start' causes are compiled from the OEM manual plus etrailer and owner-forum diagnostics. Fuse location confirmed specifically for FMCM15SS.

● Last verified 2026-06-29 · compiled from manufacturer documentation. Codes can vary by model year — always cross-check your unit’s manual.