mypros+
Error code reference

GE Range Error Code F780

60 Hz square wave not getting to touch key chip on Main Logic Board.

GE codesGE range codes
Avg. service call
$285
National average. Trip fee plus diagnostic plus labor. Before parts.
MyPros+ 3-day pass
$9.95
Same diagnostic steps, on your phone. Start now.
You keep in your pocket
~$275
Even before you buy the part.
Skip the service call. Fix it yourself.
Full procedure unlocks instantly.
Get Started

What the F780 error code actually means

The F780 error means your GE range's control board is not receiving an important timing signal it needs to make the touch controls work. This is typically caused by a wiring problem between two internal circuit boards, or by one of those boards failing. The range will need to be diagnosed and likely have a part replaced to resolve this error.

Diagnostic procedure

The full F780 procedure

Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.

MyPros+ · DiagnosticsStep 1 preview
1
First diagnostic step
a) Check harness to J241 pin 4 for open. b) Replace Main Logic Board if voltage is OK to J241 pin 4. OR c) Replace Main RPSM Board if no voltage at RPSM J17 pin 9.
Unlock with pass
Unlock with pass
Unlock with pass
More steps, wiring diagram references, and verified part numbers
Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.
Unlock F780 procedure $9.95

Or subscribe: $29/month for unlimited access to all codes plus Max AI diagnostics.

Most common causes of F780

Ranked by how often they cause this code
  1. 1Open circuit in wiring harness at J241 pin 4
  2. 2Failed Main RPSM Board
  3. 3Failed Main Logic Board
  4. 4Loose or improperly seated connector

Most DIYers save hundreds by diagnosing before ordering parts.

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass

Questions people ask about F780

What does F780 mean on a GE range?
The F780 code means the 60 Hz square wave signal is not reaching the touch key chip on the Main Logic Board. This signal is generated by the Main RPSM Board and travels through the wiring harness to the Logic Board. Without it, the touch control interface cannot operate. The fault can be caused by a wiring issue, a failed RPSM Board, or a failed Main Logic Board.
Is it safe to continue using my GE range while F780 is displayed?
The F780 error is related to the control board signal path and touch interface. Until the fault is resolved, the touch controls may not function reliably or at all. It is advisable to avoid using the range until the issue is diagnosed and repaired to prevent any unintended operation.
Will resetting the range clear the F780 error code?
A power reset, done by unplugging the range or tripping its circuit breaker for a few minutes, may temporarily clear the F780 code. However, if the underlying cause such as an open harness, failed RPSM Board, or failed Logic Board is not corrected, the error will return. A reset alone is not a fix for this fault.
Can I fix the F780 error myself without replacing parts?
In some cases, yes. Start by inspecting the wiring harness connected to J241 pin 4 for any visible damage, breaks, or loose connections, and check that all connectors are firmly seated. If the harness and connectors appear intact and properly connected, resolving the fault will require replacing either the RPSM Board or the Main Logic Board, which is best handled by someone comfortable working with appliance electronics.
How much does it cost to repair a GE range F780 error?
Repair costs depend on which component has failed. If only the wiring harness needs repair or a connector needs reseating, costs are minimal. Replacing the Main RPSM Board or Main Logic Board typically runs anywhere from $150 to $400 or more for parts and labor, depending on your specific model and local service rates.

Related GE range error codes

All GE range codes

78,000+ service manuals · 160,000+ error codes · 55+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass