Quick diagnosis
What this code is telling you
Most likely trigger
miswired electrical supply
Recommended replacement
Electrical Supply / Installation
Diagnostic path
3 ordered checks
Part fit
Exact model number required
Safety first
Before opening the appliance
Turn the appliance off before internal service. Cooking appliances can contain 120/240-volt circuits, high-temperature surfaces, and on gas models combustible fuel; qualified service is recommended for internal electrical or gas work.
Read the full safety disclaimerRoot cause
Why the control reported this error
Bad Line appears when the range or oven detects incorrect electrical wiring at the power connection because miswired electrical supply. incorrect line connection and installation wiring fault can produce the same code, so verify the fault before replacing components.
Possible causes
Check the most likely causes first
- 1
miswired electrical supply
Start here when it matches your symptoms.
- 2
incorrect line connection
- 3
installation wiring fault
Diagnostic sequence
Work through these checks in order
Stop when you find the fault. Do not perform a step that requires skills or live testing you are not qualified to do.
- 1
Check 1
Do not continue using the appliance until the wiring is corrected.
- 2
Check 2
Have a qualified electrician verify the branch circuit, receptacle, and appliance connection.
- 3
Check 3
Restore power only after the miswire has been corrected.
Recommended next step
Troubleshoot before buying a part
This code does not point to a replacement part as the first action.
Follow the diagnostic sequence above first. Supply problems, maintenance conditions, settings, airflow restrictions, or temporary control states can often trigger this code without a failed component.
If the code returns after the listed checks, use the complete model number and manufacturer documentation before ordering anything.
Common questions
Quick answers for this fault
What should I check first for Bad Line?
Start with miswired electrical supply. If that checks out, continue through the diagnostic sequence above rather than replacing a part based on the code alone.
Do I need to buy a part for Bad Line?
Usually not as the first step. This code is commonly tied to a setting, supply issue, maintenance condition, airflow restriction, or temporary operating state. Complete the diagnostic checks before considering parts.
When should I stop troubleshooting Bad Line myself?
Stop if the next step requires live electrical testing, sealed-system work, gas or combustion service, or any procedure outside your training. Turn the appliance off before internal service. Cooking appliances can contain 120/240-volt circuits, high-temperature surfaces, and on gas models combustible fuel; qualified service is recommended for internal electrical or gas work.
Manufacturer reference
Verify against the official support source
FixCodeDB summarizes the fault in plain language. For model-specific instructions, confirm the guidance with the manufacturer and your appliance manual.
GE Range & Wall Oven Fault Codes — GE Appliances →Was this useful?
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Related GE guides
GE documents F0, F1, F6, and F7 as keypanel-related faults on applicable ranges and wall ovens.
F2 or F20 indicates that oven temperature exceeded a preset safety threshold.
GE documents F3 and F4 as oven-temperature-sensor faults on applicable ranges and wall ovens.
Code F30 indicates the electronic control board senses an open circuit (infinite resistance) in the oven sensor circuit.
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