Monogram Range Hoods E3 Error: LED lighting circuit fault
The Monogram ZV series range hood has detected a fault in the LED lighting circuit, such as an open circuit, a failed LED driver, or an LED array that is drawing current outside the expected range for the installed configuration.
~15%
DIY Fixable
From $200
Typical Repair Cost
1–3 hrs
Pro Repair Time
Quick Assessment
Answer to continue safely
Is it safe to keep using?
Yes. An LED lighting fault is low severity and does not affect fan ventilation performance. The range hood can be operated safely for ventilation while the lighting fault is addressed, though cooking without task lighting is less convenient.
Can I reset the code?
Yes. A power-cycle reset may clear a transient E3 fault caused by a loose connection. If the code returns after reset, LED module or driver replacement is required.
When to stop immediately?
Stop if you notice: E3 returns immediately after every reset regardless of lighting control state., A burning smell is present near the lighting area — disconnect power immediately..
Symptoms You May Notice
Hood lighting fails to illuminate when activated
Pressing the lighting control button produces no illumination from the LED arrays in the capture hood, even though the fan and other controls continue to operate normally.
E3 fault code shown on the control display
The E3 code appears when the lighting circuit is activated or during the startup self-check, indicating the LED driver has detected an abnormal load condition.
One section of hood lighting is out while others work
On multi-zone LED configurations, one lighting zone is dark while adjacent zones illuminate normally, pointing to a failed LED module or a severed connection in that specific zone's circuit.
Lights flicker or strobe before going fully dark
Before the E3 fault fully locks out the lighting, the LEDs may flicker at irregular intervals — a sign that a connection is intermittent or an LED module is failing but not yet fully open circuit.
Possible Causes
Failed LED module or bulb array
One or more LED emitters in the hood lighting array have reached end-of-life or were damaged by heat exposure, creating an open circuit that the LED driver detects and flags as E3.
DIY PossibleFailed LED driver board
The constant-current LED driver that powers the lighting array has developed an internal fault, producing no output even when LEDs are intact. Driver failure is more common after power surge events.
Requires ProfessionalSafe Checks You Can Do
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1
Inspect LED modules for visible damage
With the hood powered off, visually inspect each LED panel or module visible inside the capture zone. Look for darkened or burned LED emitters, yellowed lenses, or any sign of heat damage near the module's contact points.
Use a flashlight to examine each LED module closely — a single failed emitter in a series array is enough to break the circuit and trigger E3 on some driver configurations.
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2
Check whether LED modules are user-replaceable
Consult the ZV hood documentation to determine whether the installed LED modules are designed for user replacement. Some ZV models use twist-lock or bayonet LED modules that can be replaced without tools. If the module type is confirmed as user-replaceable, install a Monogram-approved replacement and test.
Only use LED replacement modules approved for your specific ZV model — incorrect LED loads can cause the driver to re-enter E3 even with new modules installed.
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3
Power-cycle the hood after any module change
After replacing a module or verifying all modules are seated correctly, switch the circuit breaker off for 30 seconds and restore power. Activate the lighting control and observe whether E3 clears.
If the E3 code clears after a reset without any module change, a loose connector may have self-corrected — inspect connectors at the next available opportunity.
When to Call a Professional
Contact a qualified technician if:
- E3 persists after confirmed-good LED modules are installed and the unit is power-cycled.
- The LED driver board shows burn marks or failed components visible through the service panel.
Need Professional Help?
Find qualified technicians in your area for proper diagnostics and repair.
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