Samsung RF28R7201SARefrigerator
Error Code FZ-DMH
Flex zone temperature control heater failure
Moderate
Address soon - your appliance may not work properly
Also displayed as: FZ-DMH LED blinks
What This Means
Heater connector loose; Heater element failure; Damper mechanism stuck
What actually causes this:
Damper heater burned out preventing mid-drawer temperature adjustment
First Thing to Check
Check if mid drawer maintains selected temperature
Parts Involved
Flex Zone Damper Heater
How to Fix
- 1
After disconnecting CN40, measure resistance CN40-25 to CN40-27: 135 ohm ±7%
- 2
0 ohm = short, ∞ ohm = open
- 3
Power OFF
Other Error Codes for RF28R7201SA
IM-FUNC
Ice maker not making ice
IO-EXP
Main board input/output chip failure
DISP-PANEL
Dispenser display not communicating
MAIN-INV
Compressor control board communication failed
ICE-ROOM-HT
Ice storage compartment heater failure
F
Freezer temperature sensor not working
RF
Fridge cooling fan malfunction
IR-FAN
Ice room fan not operating