Range Hoods Diagnostics
DCS Range Hoods
DCS Range Hoods
Error Codes
Meanings, severity levels, safe checks you can perform, and when to call a technician.
Enter the code shown on your range hoods display
Is it safe to keep using it?
Depends on code severity. Low/Medium codes often allow continued use, High severity requires immediate stop.
Can error codes be reset?
Some codes clear after power cycle. Persistent codes indicate underlying issues needing repair.
When should I stop using it?
Stop immediately for water leak codes, burning smell, or any High severity error.
Most Common Codes
Error Code Directory
Click any code for detailed troubleshooting steps
Low
Medium
High
Code
Meaning
Severity
Common Symptom
CTRL-ERR
Control panel error
High
Pressing speed, light, or other control buttons produces no response from the hood, despite confirmed power to the unit.
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FAN-FAIL
Fan motor not running
High
Selecting any fan speed produces no air movement from the hood — no sound, no airflow through the filters, and no exhaust from the duct.
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FAN-NOISE
Loud fan operation
Medium
A metallic rattling or clanking sound occurs when the fan runs, varying in intensity with speed changes.
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GREASE-OVR
Grease filter overdue
Low
The hood control panel shows an active filter reminder indicator, signaling the grease filters have reached their scheduled cleaning interval.
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LIGHT-OUT
Hood light failure
Low
Pressing the light control button illuminates some hood lights but one or more positions remain dark.
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LOW-SUCT
Weak suction power
Medium
Visible smoke or steam from the cooking surface spreads into the kitchen rather than being drawn up through the hood filters.
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VENT-BLOCK
Ductwork obstruction
Medium
With the hood running at maximum speed and clean filters installed, little or no airflow is detectable at the exterior wall or roof cap.
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VIBRATE
Excessive vibration
Medium
Cabinets mounted above or beside the range hood transmit noticeable vibration when the hood is running, especially at high speed.
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