Ed Serious Hard — consider a tech
Samsung Dryer Ed — Heater Relay / Heating System Error
Samsung Dryer · Error code Ed
What Ed Means
The control board detected an unexpected state from the heating circuit — typically a heater relay that won't open, a shorted element, or a defective high-limit thermostat.
Symptoms
- Ed on display
- No heat or constant heat
- Cycle ends prematurely
- Dryer reaches normal temp too fast or too slow
Common Causes
1
Failed heater relay on main board
Relay stuck open (no heat) or welded closed (constant heat).
2
Open heating element
Element coil broken — no current draw detected.
3
Tripped / failed thermal cutoff
Safety thermal fuse open from a prior overheat event.
4
Defective high-limit thermostat
Open thermostat breaking the heater circuit.
How to Fix It
- Unplug the dryer and remove the back / lower panel to access the heater box.
- Test the heating element with a multimeter — should read ~10 ohms. Open = replace.
- Test the thermal fuse and high-limit thermostat for continuity — replace any that read open.
- Inspect the element for visible breaks or sagging coils touching the housing.
- Check venting before reassembly — restricted vent often causes the thermal fuse to blow.
- If element + thermostats + venting are good, the main board's heater relay has failed.
Parts You May Need
If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.
More Samsung Dryer Codes
Verified against manufacturer documentation: samsung.com
Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician.