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Error code reference

GE Range Error Code 720

Center UI board heartbeat missing

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What the 720 error code actually means

Your GE range has detected that one of its internal control boards, the one in the center of the control panel, has stopped communicating with the rest of the system. The range is designed to shut down when this happens to prevent unsafe operation. You may need a technician to check the wiring or replace that control board.

Diagnostic procedure

The full 720 procedure

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1
First diagnostic step
Check harness; possible center oven UI board failure.
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Most common causes of 720

Ranked by how often they cause this code
  1. 1Loose or disconnected wiring harness
  2. 2Damaged wiring harness
  3. 3Corroded or burned connector terminals
  4. 4Failed center oven UI board

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Questions people ask about 720

What does 720 mean on a GE range?
Error code 720 means the main control board did not receive the expected heartbeat signal from the center oven UI board within the required time window. This heartbeat is a periodic communication signal that confirms the center UI board is operating correctly. When it is missing, the range shuts down to prevent unsafe operation. The fault points to either a wiring harness issue or a failed center UI board.
Is it safe to use my GE range while error code 720 is active?
The range is designed to restrict operation when error code 720 is active precisely because the control system cannot confirm that the center UI board is functioning correctly. Using the range in this state is not recommended, as control behavior may be unpredictable. The range should be left unplugged until the fault is diagnosed and resolved.
How much does it cost to repair error code 720 on a GE range?
If the fix is simply reseating a loose harness connector, there may be no parts cost, though a service call typically runs in the range of $75 to $150 for the diagnostic visit alone. If the center UI board needs replacement, parts and labor combined can range from $200 to $450 or more depending on the specific model and local labor rates. Getting a diagnosis before committing to repair helps determine whether repair or replacement makes more economic sense.
Can I fix error code 720 on my GE range myself?
A knowledgeable DIYer can start by unplugging the range, locating the center UI board, and inspecting the wiring harness connectors for loose, damaged, or corroded connections. Reseating connectors is a low-risk first step. However, if the harness appears intact and the error returns, replacing the center UI board typically requires comfort with appliance electronics and proper reassembly, so professional service may be the safer option.
Will resetting my GE range clear error code 720?
Unplugging the range for a few minutes and restoring power may temporarily clear the error, but if the underlying cause, such as a loose harness or a failing center UI board, has not been corrected, the code will return. A reset is useful for confirming whether the fault is intermittent, but it is not a repair. Persistent recurrence means the hardware issue must be addressed.

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