The Bad Line code on a GE stove signals phase drops in the 240 volt electrical supply. Owners correct this by confirming balanced voltage at the terminal block and tightening any loose connections in the power feed. Additional steps include measuring resistance on each heating element and replacing damaged wiring segments to restore stable operation without repeated code triggers.
Verify GE Stove Power Supply Phases
A GE stove displays the Bad Line code when one leg of the 240 volt supply drops below the required threshold during operation. This condition often stems from utility fluctuations or internal connection issues rather than a control board failure. Technicians start diagnostics by isolating the power source before any component testing begins. Voltage checks must occur with the stove disconnected from the circuit to prevent false readings.
| Symptom | Primary Suspect | Difficulty 1-5 |
|---|---|---|
| Intermittent Bad Line code | Loose terminal block | 2 |
| Code during bake cycle | Weak heating element | 3 |
| Code at power on | Phase imbalance at panel | 4 |
| Code with no heat | Damaged supply wiring | 3 |
GE Stove Phase Drop Supply Causes
Phase drops occur when the incoming power lacks equal potential across both hot legs. A GE stove requires stable 120 volts from each leg to neutral for proper function. Utility side issues appear less often than loose lugs or corroded terminals inside the range. Load imbalance from simultaneous high draw elements can also trigger the code under peak conditions.
Testing begins with a multimeter set to AC volts. Measure between each hot leg and neutral first.
Then check leg to leg for a steady 240 volt reading. Any deviation beyond five volts indicates the supply problem location.
GE Stove Terminal Lug Torque Sequence
Shut off the breaker that feeds the GE stove circuit. Remove the rear access panel to expose the terminal block. Tighten each lug on the power cord connections with a torque driver set to manufacturer specifications. Reconnect the meter and restore power briefly to recheck voltages.
Test each element for continuity after power isolation. Replace any element that shows open circuit readings.
Inspect the wiring harness between the terminal block and control board for heat damage or chafing. Secure new segments with high temperature ties where needed.
Check GE Oven Element Resistance
Heating elements in a GE stove draw current across both phases. A partial failure in one element creates an imbalance that the control detects as a Bad Line condition. Measure resistance at room temperature with the element disconnected. Values should fall within the range printed on the element label.
Low resistance points to a shorted element that must be swapped. High or infinite resistance confirms an open circuit. Always verify the new element matches the original wattage and voltage rating before installation.
GE Stove Spade Connector Voltage Drops
Internal wiring carries the full load from the terminal block to multiple elements and the convection fan. Vibration over time loosens spade connectors and creates voltage drops under load. Remove each connector one at a time and inspect for discoloration or melting. Clean contact surfaces with electrical contact cleaner and a soft brush.
Re seat connectors firmly until they click into place. Route wires away from heat sources during reassembly to prevent future degradation.
Test Voltage at Terminal Block
Stable readings at the terminal block confirm the supply reaches the stove correctly. Any drop here isolates the issue to the cord or house wiring. Apply a known load such as the bake element and monitor voltage for five minutes.
A falling reading under load requires further tracing back to the breaker panel. Replace the power cord if its internal conductors show resistance above one ohm end to end.
Replace Faulty GE Stove Components
Persistent phase drops after supply verification require component replacement. Order a new terminal block or wiring harness kit matched to the stove model. Install parts with proper torque and route wires to avoid pinch points. Restore power and run a full diagnostic cycle to confirm code clearance.
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