GE GTW840CPNDG Error Code E21

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• Source: Official GE service manual
• Reviewed by: Geo Technical Editorial
• Published: March 1, 2026
• Updated: March 15, 2026
• DIY scope: Basic user checks are possible.

Error E21 on GE : Slow drain — water is draining more slowly than expected, extending the drain ph. Follow the troubleshooting steps below to diagnose and fix this washer issue. ## What Error Code E21 Means on a GE GTW840CPNDG Slow drain — water is draining more slowly than expected, extending the drain phase beyond the normal duration ## What This Error Means Error code E21 on your GE washer indicates a slow drain condition. The washer monitors how long the drain phase takes; when water drains more slowly than expected — but drainage eventually completes — E21 is logged. This is distinct from E30 or E31 (no drain at all). The most common causes of E21 are: a clogged drain pump filter (on front-load models, behind the bottom front access panel), a drain hose that is kinked, elevated too high (above 96 inches), or partially obstructed by lint, or a partially failing drain pump whose impeller is partially blocked by a small item (coins, buttons, hair ties) that allows some flow but restricts full flow. Cleaning the drain pump filter is a free and often immediately effective fix for E21. GE recommends cleaning the drain pump filter every 6 months as routine maintenance. ## Quick Diagnostic Summary | Detail | Value | |--------|-------| | Error Code | E21 | | Severity | Medium | | Appliance | GE GTW840CPNDG GE Washer | | User-Fixable | Yes | | Applicable Models | GFW850SPNRS, GFW650SSNWW, GTW840CPNDG | ## Step-by-Step Troubleshooting | Step | Action | What To Do | Expected Result | |------|--------|------------|-----------------| | 1 | Clean the drain pump filter (front-load models) | Open the bottom front access panel (unscrew or unclip — 2-3 screws or clips). Locate the round drain pump filter cap. Place a towel and a shallow pan under the filter. Turn the filter cap counterclockwise and slowly pull it out while letting residual water drain. Remove all debris (lint, coins, hair) from the filter and housing. | Drain pump filter is clean with no debris. Filter cavity shows no blockage. | | 2 | Inspect and reposition the drain hose | Pull the washer away from the wall. Inspect the drain hose for kinks or sharp bends. Confirm the hose end inserted into the standpipe or utility sink is no higher than 96 inches (8 feet) from the floor. A standpipe that is too high creates a siphon that slows drainage. | Drain hose is straight with no kinks. Hose end is between 30 and 96 inches from the floor. | | 3 | Run a Spin-only or Drain+Spin cycle | After cleaning the filter and checking the hose, run a Drain+Spin or Spin-only cycle. Observe whether the washer drains completely and spins to full speed without displaying E21. | Washer drains completely within the normal time. E21 does not appear during the drain cycle. | | 4 | Inspect drain pump impeller for foreign objects | If E21 persists after cleaning the filter, unplug the washer and access the drain pump (behind the pump filter housing). Using a thin tool, check inside the pump housing for any small item caught in the impeller. Carefully remove any obstruction. Reinstall the filter cap firmly. | Pump impeller spins freely when turned by hand. No foreign objects found in pump housing. | | 5 | Replace drain pump if partially failed | If the impeller is clear but the pump hums slowly during draining or E21 consistently returns, the pump motor winding has weakened and the pump must be replaced. Order the correct drain pump for your GE model. Replace with power disconnected, reconnect wiring harness, and test. | New drain pump installed. Washer drains completely within normal time. E21 does not return. | ## Frequently Asked Questions ### How often should I clean the GE front-load washer drain pump filter? GE recommends cleaning the drain pump filter every 6 months as part of routine maintenance. In households that wash heavily soiled items frequently or that have pets with shedding fur, cleaning every 3 months is recommended. A clogged filter is the most common cause of E21 and can also lead to odors and E30/E31 drain failure codes. ### Can E21 appear because of the type of detergent used? Yes. Using too much detergent or non-HE (non-High Efficiency) detergent in a GE HE washer creates excessive suds that slow drainage. Suds can partially block the pump and drain hose. Always use HE-rated detergent in the amount specified on the detergent label for HE washers, typically 1-2 tablespoons per load. ### What is the maximum drain hose height for a GE washer? GE front-load and top-load washers require the drain hose standpipe height to be between 30 inches (minimum, to prevent siphoning during fill) and 96 inches (8 feet) maximum from the floor. A standpipe that is too high creates back-pressure that slows or prevents proper drainage. ### Is E21 the same as E30 or E31? No. E21 = slow drain (water drains but slower than normal). E30 = drain timeout (pump ran but washer could not drain within the maximum allowed time). E31 = no drain signal (control board is not receiving a signal from the drain pump). E21 is the mildest of the three and usually indicates a partial blockage rather than a complete pump or hose failure. --- Last Updated: March 2026 · GE GE Washer · Error Code E21 ### Is it safe to keep using my GE with error E21? If error E21 does not indicate an immediate safety hazard such as a gas leak, electrical short, or water flooding, you can continue limited use while monitoring the appliance. However, running the washer with an active error code increases the risk of further damage. Address the underlying issue as soon as possible. For high-severity errors, disconnect the appliance and contact a qualified technician. ### How much does it cost to fix error E21 on a GE ? Repair costs for error E21 on the GE washer depend on the root cause. DIY fixes such as cleaning filters, resetting the unit, or reconnecting loose wires cost nothing beyond basic tools. If a component replacement is needed, parts and labor from a certified technician are the main expenses. Contact a GE-authorized service provider for an accurate estimate based on your specific situation. ### What does error code E21 mean on a GE washer? Error code E21 on GE washer models indicates Slow drain — water is draining more slowly than expected, extending the drain phase beyond the norma. This error is detected by the appliance’s internal diagnostic system and displayed to alert the user that attention is needed. Refer to the troubleshooting steps above for guidance on resolving this issue. ### Is it safe to keep using my GE with error E21? If error E21 does not indicate an immediate safety hazard such as a gas leak, electrical short, or water flooding, you can continue limited use while monitoring the appliance. However, running the washer with an active error code increases the risk of further damage. Address the underlying issue as soon as possible. For high-severity errors, disconnect the appliance and contact a qualified technician. ### How much does it cost to fix error E21 on a GE ? Repair costs for error E21 on the GE washer depend on the root cause. DIY fixes such as cleaning filters, resetting the unit, or reconnecting loose wires cost nothing beyond basic tools. If a component replacement is needed, parts and labor from a certified technician are the main expenses. Contact a GE-authorized service provider for an accurate estimate based on your specific situation. ### What does error code E21 mean on a GE washer? Error code E21 on GE washer models indicates Slow drain — water is draining more slowly than expected, extending the drain phase beyond the norma. This error is detected by the appliance’s internal diagnostic system and displayed to alert the user that attention is needed. Refer to the troubleshooting steps above for guidance on resolving this issue.