Whirlpool Washing Machine: error code F35, suds error

Professional Repair Guide

What is this symptom?

Experiencing the F35 error code on your Whirlpool washing machine? This indicates a water level sensing issue, often linked with excessive suds. The machine may stop mid-cycle or fail to advance due to suds detection. Understanding the causes can help you resolve the problem effectively.

Urgency: Medium

Important Tips for Whirlpool Models

  • Official Whirlpool documentation confirms SUD/SD indicates excessive suds; Whirlpool F35 diagnostic points to water level detection issues. (TechFaultFix

Possible Causes

Faulty or defective analog pressure sensor (water level pressure switch)

How to Identify: F35 persists after clearing error and the machine cannot detect proper water level; common recommendation across multiple repair sources. (TechFaultFix(TechFaultFix

Part: Analog pressure sensor / water level pressure switch

Blocked or kinked pressure hose affecting pressure sensor readings

How to Identify: Hose obstruction, kinks, or debris causing improper pressure signals; manual inspection required. (TechFaultFix

Part: Pressure hose between drum and pressure switch

Incorrect detergent type or excessive detergent causing true suds condition

How to Identify: Use of non‑HE detergent or too much detergent resulting in visible excess suds and triggering SUD/SD warnings per official Whirlpool documentation. (TechFaultFix

Part: User input detergent type/usage

Loose or damaged wiring between the pressure sensor and control board

How to Identify: Visual inspection shows loose, frayed, or corroded wiring; intermittent connection issues. (TechFaultFix

Part: Wiring harness between sensor and CCU

Control board malfunction interfering with sensor communication

How to Identify: Error persists after checking sensor and hose, indications of broader electronic failure. (TechFaultFix

Part: Central Control Unit (CCU)

DIY Solutions

Run rinse/spin to reduce excessive suds

Easy 15 minutes
  1. Start a rinse and spin cycle with no detergent to clear excess suds.
  2. Allow the machine to finish the cycle and check if SUD/F35 error clears.
⚠️ Safety First: Unplug the washer before further internal inspection.

Inspect and clear pressure hose

Moderate 30–45 minutes
Tools Needed: Screwdriver set, Flashlight
  1. Unplug the washer from power.
  2. Remove necessary access panel to reach pressure hose.
  3. Inspect hose for kinks, blockages or debris and clear them.
  4. Reassemble and test wash cycle.
⚠️ Safety First: Ensure power is disconnected before panel removal.

Check and clean pressure sensor

Moderate 45–60 minutes
Tools Needed: Screwdriver set, Compressed air or small brush
  1. Power off and unplug the washer.
  2. Access the pressure sensor near the top of the unit.
  3. Disconnect and inspect the sensor, use compressed air to clean.
  4. Reconnect and reassemble, then test the washer.
⚠️ Safety First: Handle electronic components carefully to avoid damage.

Next step

Choose the next step for error code F35, suds error

Confirm the diagnosis before ordering. An error code can identify the system involved, but it does not prove that a specific part has failed.

Check during diagnosis

Most relevant component to inspect

Pressure Switch

Detects the water level inside the tub and signals when to start or stop filling.

Typical part-only price
$25 - $65
DIY difficulty
Easy
Estimated time
15-30 mins
Where can I find the model number?

Check the rating label around the door, lid, frame, rear panel, or inside the appliance cabinet. Use the complete model number, including suffixes.

Find a part that fits my model

Verify the complete model and part number on the retailer's compatibility page before ordering.

Other parts options

Check related components first; use model search as a fallback.

Possible related component

Wiring Harness

Connects controls, sensors, motors, and other electrical components inside the appliance.

$20 - $120 · Medium · 30-90 mins

Check fit & price
Model number required

Model-compatible Washing Machine parts

Enter the complete model number to browse compatible replacement parts. This is a model-based parts search, not a diagnosis that a specific component failed.

Find a part that fits my model

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Optional routine care

Maintenance supplies

These products support cleaning or routine upkeep. They are separate from the possible repair components above and are not claimed to fix this error code or symptom.

Maintenance supply

Washing Machine Cleaner Tablets

Routine tub-cleaning supplies for residue and odor control. They do not repair a mechanical, drainage, or electronic fault.

View maintenance supply
Maintenance supply

Braided Washer Inlet Hoses

A maintenance replacement option for visibly worn external fill hoses. Verify thread size, length, and hot/cold connection requirements.

View maintenance supply
Maintenance supply

Washer Drain Hose Holder

Helps secure an external drain hose at the standpipe. It does not correct an internal pump or control fault.

View maintenance supply

Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. Recommendations are based on routine-care relevance, not commission rate.

Professional Repairs

Replace analog pressure sensor

Estimated Cost: $30 - $120

Control board repair or replacement

Estimated Cost: $150 - $300+

When to Call a Professional

If the F35 error persists after clearing suds and DIY pressure sensor/hoses checks
If wiring damage or control board issues are suspected

Preventive Maintenance

  • Use correct HE detergent in proper amounts: Excessive suds errors and associated F35 triggers
    Frequency: Every load
  • Regularly inspect and clean pressure hose: Blockages affecting water level sensing
    Frequency: Every 6 months

Frequently Asked Questions

Why is my Whirlpool Washing Machine Error code F35 with suds error?
Common causes include a faulty pressure sensor, blocked pressure hose, or using too much detergent.
How do I fix Whirlpool Washing Machine Error code F35 with suds error myself?
Try running a rinse/spin cycle, inspect the pressure hose for blockages, or clean the pressure sensor.
How much does it cost to fix Error code F35 with suds error?
Professional repair costs range from $30 to $300+, depending on whether you need a sensor replaced or a control board repaired.
When should I call a technician for Error code F35 with suds error?
If DIY solutions fail or the issue recurs, it's best to consult a technician for a thorough diagnosis.

References & Sources

Community Analytical Insights

Guidance from available sources; statistical claims are shown only for samples of at least 10 discussions

Common Issues Reported by Users

  • Excessive detergent usage leading to suds overflow
  • Using non-HE (High Efficiency) detergent
  • Faulty pressure switch or hose causing incorrect suds detection

User Suggested Solutions

  1. Reduce the amount of detergent used in future washes. If using liquid detergent, switch to a smaller amount or switch to HE detergent. Run a rinse cycle to clear excess suds.

  2. Check for and replace non-HE detergent with a certified HE detergent. Run a rinse cycle to remove any remaining suds.

  3. Inspect the pressure switch and hose for blockages or damage. Clean or replace as necessary. If the issue persists, consult the service manual for testing procedures.

Limited-source guidance; percentages and success-rate claims are not shown
View Sources

Data compiled from real discussions on r/appliancerepair and r/Appliances:

  1. Whirlpool Duet F35/Suds - capacitors or pressure sensor?

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