mypros+
Error code reference

GE Range Error Code F770

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

GE codesGE range codes

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

First step from the service manual

Check harness to J241 pin 4 for open. Replace Main Logic Board if voltage is OK to J241 pin 4. Replace Main RPSM Board if no voltage at RPSM J17 pin 9.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

MyPros+ Max

Get the full diagnostic procedure for F770.

  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
Get the full procedure

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

What F770 means on a GE range

The F770 error code on a GE range indicates that the 60 Hz square wave signal is not reaching the touch key chip located on the Main Logic Board. This square wave is a timing reference signal that the touch key chip requires to properly register and process touch input from the control panel. Without this signal, the board cannot interpret user commands, and the range will be unable to operate normally. The signal originates from the Main RPSM (Range Power Supply Module) Board and travels through the wiring harness to the Main Logic Board.

The diagnostic path focuses on two specific connector points: RPSM connector J17 pin 9, which is where the signal leaves the power supply board, and Logic Board connector J241 pin 4, which is where the signal should arrive. If voltage is absent at RPSM J17 pin 9, the power supply board itself is the likely source of the fault and will need replacement. If voltage is present at J17 pin 9 but not at J241 pin 4, the problem lies in the wiring harness between the two boards, specifically an open circuit in that leg of the harness.

If voltage is confirmed good all the way to J241 pin 4 on the Logic Board but the F770 error persists, the fault is internal to the Main Logic Board itself, meaning the touch key chip or related circuitry on that board has failed. In that scenario, replacing the Main Logic Board is the correct repair. This is a signal-path fault that requires methodical voltage checks at each connector before committing to a parts replacement.

Source: manufacturer service documentation.

Common causes of F770

  1. 01

    Open circuit in wiring harness

    Wiring / connection

    A break or open condition in the wire running between the RPSM Board and the Logic Board is the most common cause. This can result from a pinched, burned, or corroded wire in the harness segment leading to connector J241 pin 4.

  2. 02

    Failed Main RPSM Board

    Part replacement

    If no voltage is present at RPSM connector J17 pin 9, the power supply module is not generating the 60 Hz square wave signal at all, and the board needs to be replaced.

  3. 03

    Failed Main Logic Board

    Part replacement

    If voltage checks confirm the signal is present and correct at J241 pin 4 but the error remains, the touch key chip or associated circuitry on the Main Logic Board has failed internally and the board must be replaced.

  4. 04

    Loose or corroded connector at J241 or J17

    Wiring / connection

    A poor connection at either the J241 pin 4 or J17 pin 9 connector can interrupt the signal path without a true open in the harness wire itself. Inspecting and reseating both connectors is an important early step.

See the test procedure for each cause

Frequently asked questions about F770

What does F770 mean on a GE range?
The F770 code means the 60 Hz square wave signal that the touch key chip on the Main Logic Board needs is not arriving as expected. This signal comes from the Main RPSM Board and travels through the wiring harness. Without it, the touch controls cannot function properly. The fault can be in the RPSM Board, the wiring harness, or the Logic Board itself.
Can I fix the F770 error myself?
A knowledgeable DIYer can perform the initial harness inspection by checking for visible damage or loose connectors at J241 pin 4 and J17 pin 9. However, accurately diagnosing whether the RPSM Board or the Main Logic Board is at fault requires a multimeter and the ability to safely test voltage inside the range while it may be energized. If you are not comfortable working around live electrical components, a qualified technician should perform this repair.
Is it safe to use my GE range when the F770 code is displayed?
An F770 error typically means the touch control panel is not functioning reliably, which can make it difficult or impossible to set cooking functions safely. It is best to avoid using the range until the fault is diagnosed and repaired. Continuing to operate an appliance with a control board fault can risk further component damage.
How much does it cost to repair a GE range F770 error?
Repair costs depend on which component has failed. Wiring harness repairs or connector fixes are generally the least expensive option, often falling in the range of $50 to $150 in labor if no parts are needed. Replacing the Main RPSM Board or Main Logic Board typically costs between $150 and $400 or more, depending on parts pricing and labor rates in your area.
Will resetting the range clear the F770 error code?
Disconnecting the range from power for a few minutes may temporarily clear the error, but it will return if the underlying signal path fault is not corrected. The F770 code reflects a real hardware issue with the 60 Hz square wave circuit, so a reset is not a fix. Proper diagnosis of the harness, RPSM Board, and Logic Board is required to resolve it permanently.

Related GE range codes

All GE range codes
View all 303 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