Samsung Oven Error Code E-43
Power relay failure on main control board
The most common cause of the E-43 error on a Samsung oven is relay contacts burned or welded (~55% of cases); start with: power cycle the oven.
What Does Error Code E-43 Mean on a Samsung Oven?
Power relay failure on main control board.
A power relay on the main control board that switches a heating element has failed, usually with burned or welded contacts, so the oven can't control that element and shuts down. A power surge or years of switching cycles wears the relay out, and it isn't separately serviceable.
What Causes Error Code E-43?
Here are the most common causes in order of frequency. Start with the most likely cause before moving to the next:
- 1 Relay contacts burned or welded 55% of cases
- 2 Power surge damaged the relay 25% of cases
- 3 Relay worn out from years of cycling 15% of cases
- 4 Broader control board failure 5% of cases
How to Fix Samsung Oven Error Code E-43
- 1
Power cycle the oven
Turn the breaker off for 15 minutes, then back on; a transient E-43 from a surge can occasionally clear this way.
- 2
Inspect the board relay
With the breaker off, look at the relays on the control board for scorching or melted housings around the contacts.
⚠️ Photograph all wiring before disconnecting anything. - 3
Replace the main control board
E-43 almost always needs a new board, since the relay isn't sold separately and high-voltage repair isn't DIY-safe.
🔩 Samsung oven control board ($150–$380)
How to Reset Error Code E-43
Turn the oven's breaker off for 15 minutes to fully de-energize the control board, then restore power; if E-43 returns, the relay contacts have failed and the board must be replaced rather than reset again.
Note: If the error returns after resetting, the underlying issue has not been resolved. Work through the fix steps above.
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When to Call a Professional
Have a technician replace the control board, since E-43 repair involves disconnecting high-voltage element wiring and matching a board to your exact model — mistakes here risk shock or a runaway heating element.
Same Code on Other Brands
Error code E-43 appears on these other brands too. See every brand that shows E-43 →
Find Replacement Parts
Use these links to find the exact replacement parts for your Samsung Oven:
External links — ApplianceErrors.com is not affiliated with these retailers.
More Samsung Oven Error Codes
Frequently Asked Questions
Can I keep using my Samsung Oven when error E-43 appears? +
What most commonly causes E-43 on a Samsung Oven? +
E-43 keeps coming back after a reset — what should I check next? +
How much does it cost to fix Samsung Oven error E-43? +
Sources & References
- • Samsung Support — Error Codes — official manufacturer documentation
- • Our editorial & verification policy
Content verified against manufacturer service documentation. Last verified: June 10, 2026.