GE Range Error Code ER 26

ER 26 indicates a MTwisT control fault where the relay supply voltage has been detected as too high while the relay is in its off state. This is a protective fault generated by the range's control system when it senses voltage outside the acceptable range on a relay supply line. It can be caused by a defective control board, a relay that is not fully opening, or abnormally high incoming line voltage from the home's electrical supply.

It is not recommended to continue using the range while ER 26 is active. This fault indicates the control system has detected an overvoltage condition on a relay supply circuit, which represents a potential risk of damage to internal components or unsafe operation. Discontinue use until the fault has been properly diagnosed and resolved.

Repair costs vary depending on the cause. If the issue is a faulty MTwisT control board, parts and labor typically range from around $200 to $500 or more depending on the specific model and local labor rates. If the problem is traced to the home's electrical supply, an electrician may need to address the line voltage separately, which adds additional cost.

Some homeowners with electrical knowledge can check the incoming line voltage at the terminal block to rule out a household supply issue. However, diagnosing and replacing the MTwisT control board involves working with high-voltage components and is best handled by a qualified appliance technician. Attempting repairs without proper knowledge of the electrical system can be hazardous.

Disconnecting the range from power for several minutes and restoring power may temporarily clear the error, but if the underlying cause, such as a faulty control board or high line voltage, is still present, the fault will return. A reset alone does not fix the root electrical issue and should not be relied on as a solution.