Diagnosis
The recurring reset of the clock to 12:00 on your GE JGBS66REKSS is typically caused by a momentary loss of voltage to the Electronic Control Board (ECB) that occurs specifically during the power-down cycle of the oven's heating elements. Unlike a total power outage, this "micro-dropout" happens because the board is failing to maintain its volatile memory (RAM) when the high-amperage draw of the oven shuts off, causing a voltage spike or dip that triggers a system reboot. Because this model does not utilize a dedicated CMOS backup battery to maintain time settings, it relies on a constant, stable flow of AC power. If the capacitors on the control board have degraded or if there is a loose neutral wire in the junction box, the board cannot "bridge" the millisecond gap in power when the oven switches off. You can confirm this by observing if the display flickers or if the oven lights momentarily dim exactly at the moment the clock resets to 12:00.
How to Fix It
To resolve this, you must first rule out external power fluctuations before replacing the internal electronics. Follow these precise steps:
- Locate your home's electrical panel and switch the 40-amp or 50-amp double-pole breaker assigned to the range to the OFF position.
- Wait exactly 5 minutes. This allows the capacitors on the control board to fully discharge, clearing any "ghost" errors in the logic circuit.
- While the power is off, pull the range out from the wall. Inspect the power cord where it enters the chassis. Ensure the strain relief clamp is tight and that no wires are pinched or frayed.
- Check the terminal block (where the house wiring connects to the range wiring). Ensure all nuts are tightened to approximately 20-25 lb-in to prevent arcing.
- Push the range back and restore power at the breaker.
- Set the clock using the "Clock" button, adjusting the hours and minutes until the flashing stops.
- Run a short 10-minute bake cycle at 350°F. Turn the oven off and observe the display. If the clock remains set, the hard reset cleared the logic error. If it reverts to 12:00, the control board's internal memory capacitors have failed and the board (Part #WB27X10528 or equivalent) must be replaced.
If That Didn't Work
- Replace the Electronic Control Board: If the hard reset failed, the PCB is unable to hold a charge. You will need to remove the back guard/splashback, unscrew the control board housing, and swap the board. Be sure to take a photo of the wire harness colors before disconnecting, as several white and black wires look identical.
- Test for Voltage Sag: Use a multimeter to test the voltage at the wall outlet while the oven is cycling off. If you see a drop below 108V, the issue is with your home's electrical wiring or a loose connection in the wall box, not the range itself.
- Check the Thermal Fuse: Inspect the oven's thermal fuse (usually located near the top rear). If the fuse is partially failing or has high resistance, it can cause erratic power delivery to the control board during temperature transitions.
- Verify Grounding: Ensure the range is properly grounded. A "floating ground" can cause electromagnetic interference (EMI) that trips the sensitive logic on the control board when the oven's solenoid or heating element switches off.
Heads Up
- Avoid Extension Cords: Never plug a gas range into an extension cord or power strip; the high amperage required for the oven will cause voltage drops that lead to exactly this type of clock reset.
- Static Warning: When replacing the control board, touch a grounded metal surface before touching the new PCB to avoid static discharge, which can fry the new board instantly.
- Cleaning Caution: Do not use heavy degreasers or spray cleaners directly on the control panel; liquid can seep behind the buttons and cause short circuits in the memory chip.
- Consistent Power: If you live in an area with frequent brownouts, consider a dedicated surge protector designed for heavy appliances to protect the sensitive PCB.