Dacor Range E1 Error: Control power supply fault
This dacor range e1 error code guide explains what this fault means for your Dacor appliance and how to respond safely. What E1 Means on a Dacor Range E1 on a Dacor range indicates the control board detected an abnormal voltage on its internal power supply rails. The board requires a stable regulated voltage to […]
~10%
DIY Fixable
From $300
Typical Repair Cost
60-90 min
Pro Repair Time
Quick Assessment
Answer to continue safely
Is it safe to keep using?
No. Power supply fault on the control board disables all functions. The range should not be used.
Can I reset the code?
Yes. A breaker reset may help if caused by a power surge. Persistent E1 requires board-level repair.
When to stop immediately?
Stop if you notice: Do not use the oven — an unstable power supply means temperature regulation cannot be guaranteed., Stop if the display is flickering continuously — this indicates an active power instability that may damage the board further with each restart..
Symptoms You May Notice
Display dims or flickers before showing E1
The control display brightness fluctuates or the display cycles through startup screens just before settling on E1 — a direct indicator that the board is not receiving stable regulated voltage.
Oven and controls restart spontaneously
The range reboots on its own, clock resets to 12:00, and E1 reappears after each restart — the board is power-cycling due to an unstable supply voltage.
E1 appeared after a power outage or brownout
The code surfaced after the home lost power or experienced a partial voltage drop — brownouts are particularly damaging to the capacitors in a range's internal power supply section.
Only some functions operate erratically
Before E1 becomes persistent, certain functions may work intermittently — the clock sets correctly but the oven timer fails, or only some keypad buttons respond — reflecting an unstable power rail.
Possible Causes
Failed control board power supply section
The voltage regulator, capacitors, or rectifier diodes in the board's internal power supply have failed, providing an out-of-range voltage to the processor and control circuits.
Requires ProfessionalInadequate incoming supply voltage
The 240V supply to the range is dropping below specification due to a loose connection at the outlet, breaker, or the range terminal block. This causes the board power supply to operate outside its design range.
Requires ProfessionalSafe Checks You Can Do
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1
Check the circuit breaker
A partially tripped double-pole breaker can supply 120V to one leg of the range while the other leg is dead, causing E1. Open the breaker panel and verify that the range breaker is fully tripped to OFF, then reset it firmly to ON. Do not cycle the breaker rapidly.
A partially tripped breaker looks visually ON but sits at the midpoint — only resetting fully OFF then ON restores correct contact.
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2
Perform an extended power cycle
Turn the range breaker fully OFF for 10 minutes. Restore it and check whether E1 clears and the display returns to normal. If the range operates correctly through a full bake cycle, a transient supply fault caused the E1 event.
If E1 returns within a few minutes of restarting, the internal board power supply has failed and a reset will not solve it.
When to Call a Professional
Contact a qualified technician if:
- E1 persists after breaker reset and extended power cycle — control board power supply section requires diagnosis and likely board replacement.
- Supply voltage measured at the range terminal block is outside 220-240V range — electrical supply issue must be resolved by a licensed electrician before board repair.
- Brownout damage is suspected — a technician should inspect all board capacitors for bulging or leakage before installing a replacement board.
Need Professional Help?
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