ErrorCodePro · Appliance Error CodesGE GTW top-load washer Error Code 12, 20: Meaning & How to Fix It
By the ErrorCodePro Editorial Team · Last reviewed October 20, 2026
GE GTW top-load washer error code 12, 20 means: Water overflow error. [1] Keep using it? No. Stop using it until the cause is fixed. Start with the owner checks below, beginning with: write down the code and model number.
Source: GE GTW top-load washer error-code chart, via Sears PartsDirect [1].
Quick facts
| Code | 12, 20 |
|---|---|
| Also shown as | 21 |
| Brand / appliance | GE GTW top-load washer |
| System | Leak protection |
| Meaning (service chart) | Water overflow error. [1] |
| Keep using it? | No. Stop using it until the cause is fixed |
| DIY-safe? | Owner checks only (listed below) |
| Support | GE Appliances support (products.geappliances.com) |
| Source document | GE GTW top-load washer error-code chart (via Sears PartsDirect) |
On this page: Meaning · Steps · Parts · When to call a technician · Related codes · FAQ
What error code 12, 20 means on a GE GTW top-load washer
Water overflow error. [1]
This is a leak protection code. Codes and wording can vary by model, so check your owner's manual for your model number.
How to fix GE GTW top-load washer error code 12, 20 (safe owner checks)
- Write down the code and model number. Note exactly what the display shows (12, 20) and copy the full model number from the rating label, so you can confirm this chart applies to your GTW top-load washer and order the right parts.
- Reconnect the air hose. Reconnect the air hose if it’s loose.
- Check the power supply. Check to see if the tub fills with water when the power cord is unplugged.
- Do a power reset. Unplug the appliance or switch off its breaker for one minute, then restore power and try again. If the code clears and stays away, it may have been a one-off fault.
- Test and decide. Run a short cycle or restart and watch the display. If 12, 20 comes back after these checks, stop using the washer for this function and call a technician, because the remaining causes need meters or part replacement.
The first and last steps (and the power reset) are general owner checks added by ErrorCodePro; the rest follow the GE GTW top-load washer error-code chart published by Sears PartsDirect, rewritten for safe owner use.
Parts that may be involved
Exact parts depend on your model number. This page lists part types only, never part numbers.
- Inlet water valve assembly
- Water level pressure switch air hose
- Electronic control board
When to call a technician
- Unplug the washer and then check the air hose between the bottom of the tub and the connection on the electronic control board.
- Technician: replace the air hose if it’s pinched, punctured or otherwise damaged.
- If the air hose is okay, a technician should replace the electronic control board (the water level sensor is a component of the electronic control board).
- If it does, then an inlet water valve is leaking—replace the inlet water valve assembly.
- Anything involving wiring, the control board, the motor or the water valve electrics
- The appliance is under warranty: contact GE Appliances support (products.geappliances.com) first
Related error codes
Frequently asked questions
What does error code 12, 20 mean on a GE GTW top-load washer?
The GE GTW top-load washer error-code chart lists 12, 20 as follows: Water overflow error.
Is it safe to keep using the GTW top-load washer with 12, 20?
No. Stop using it until the cause is fixed.
Can I fix GE GTW top-load washer error 12, 20 myself?
Only with the owner checks on this page, starting with: write down the code and model number. If it persists, call a technician or GE Appliances support (products.geappliances.com).
Is 21 the same as 12, 20?
Yes. The source chart lists 21 with the same meaning as 12, 20; the display format depends on the model.
Sources
- Sears PartsDirect: GE GTW top-load washer error-code chart (third-party copy of manufacturer service data)
Last reviewed: October 20, 2026. ErrorCodePro is not affiliated with GE.