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Error code · Water Heater

GE GeoSpring PF/PH Code F76: Supply Voltage Too Low at Start

F76 on 2025-and-newer GE Profile GeoSpring PF and PH water heaters means the voltage is too low at power-up. When the unit starts, it measures the incoming voltage, and a low reading triggers F76. The listed…

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Code
F76
Appliance
Water Heater
Brand
GE
Warranty
30-day workmanship

What F76 means

F76 on 2025-and-newer GE Profile GeoSpring PF and PH water heaters means the voltage is too low at power-up. When the unit starts, it measures the incoming voltage, and a low reading triggers F76. The listed cause to look at is probable miswiring of the unit. You may see the water heater fail to start, shut down quickly, or never reach its heating cycle, particularly after installation or electrical work.

Common causes of F76

  • Probable miswire at the unit
  • Loose connection at the terminal block or breaker
  • Supply voltage problem to the circuit
  • Voltage sensing on the control
✓ One safe check you can try

1. Have the code and the model number at hand for the call. 2. If the unit is newly installed or wiring was changed, tell us about it. 3. Switch the breaker off and leave it off. 4. Do not open the wiring area. Call us to check the wiring.

! Why to stop there
  • A miswire and a weak supply look the same at power-up, so we check both.
  • We confirm connections at the unit and at the breaker.
  • If the problem lies outside the heater, we say so and tell you what is needed.
Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.
→Same appliance

Other Water Heater codes

F5, F6, F7, F8GE GeoSpring First-Generation GEH50DEED Codes F5-F8: Sensor failures F9GE GeoSpring First-Generation GEH50DEED Code F9: Bottom element problem F10GE GeoSpring First-Generation GEH50DEED Code F10: Top element problem F11GE GeoSpring First-Generation GEH50DEED Code F11: Tank must be filled bAd linE (F12)GE GeoSpring First-Generation GEH50DEED Code bAd linE (F12): Supply voltage low F13GE GeoSpring First-Generation GEH50DEED Code F13: Keypad key stuck Dirty Filter (F14)GE GeoSpring First-Generation GEH50DEED Code Dirty Filter (F14): Clean the filter F15GE GeoSpring First-Generation GEH50DEED Code F15: DataFlash memory error
F76F76 questions
What does low voltage at power-up mean?

The control measured less voltage than it needs when it first got power. That is most often a wiring problem rather than a worn part, so we begin with the connections.

Is F76 the same as F60?

They are related to the supply but different. F60 is an AC detection failure and F76 is low voltage at power-up. Both lead us to check the wiring first.

Can I try running it again?

We would not keep trying. If the wiring is wrong, repeated attempts do no good and can be unsafe. Leave the breaker off and call us so we can check it.

Book a visit

Still seeing F76?

A technician diagnoses it on site and gives you the price in writing before any work starts.

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