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Whirlpool Dishwasher Wont Dry Dishes: Heater and Rinse Aid Fixes

Quick Answer

A Whirlpool dishwasher that leaves wet dishes is usually caused by: (1) Heated Dry not being selected on the cycle settings, (2) the rinse aid dispenser being empty, or (3) the heating element having failed. On WDT series models, rinse aid is critical for spot-free drying - it lowers water surface tension so water sheets off rather than beading.

A Whirlpool dishwasher that leaves wet dishes is usually caused by: (1) Heated Dry not being selected on the cycle settings, (2) the rinse aid dispenser being empty, or (3) the heating element having failed. On WDT series models, rinse aid is critical for spot-free drying - it lowers water surface tension so water sheets off rather than beading. Check rinse aid level and Heated Dry selection before testing any hardware.

WhirlpoolDishwasherSeverity: low88% DIY Success
Time to Fix
5–60 min
Difficulty
beginner
Parts Cost
$35 – $65
Tools Needed
Multimeter, Torx T20 screwdriver

What Does the WONT-DRY Code Mean?

Wet dishes at cycle end: check that Heated Dry was selected, refill the rinse aid dispenser, and only then test the heating element. The first two causes resolve the majority of poor drying complaints.

Most Likely Causes

Based on aggregated repair data, here is the probability breakdown for this error code:

Heated Dry option not selected on the cycle40%
Rinse aid dispenser empty24%
Dishes with concave bottoms (bowls, cups) trapping water22%
Heating element burned out14%

Symptoms You May Notice

  • Dishes visibly wet when cycle ends
  • Plastic items particularly wet (plastics always dry less well)
  • F7 E1 error code if heating element has failed

Can you reset a Whirlpool dishwasher to clear the WONT-DRY code?

No reset needed unless F7 E1 was triggered. After replacing the element, hold Cancel/Drain 3 seconds to clear any stored code.

Tools Required for Diagnosis

MultimeterTorx T20 screwdriver

Diagnostic Checklist

Follow these steps in order. We start with the easiest external fixes before opening up the machine.

1

Check the cycle selection

Check the cycle selection - confirm Heated Dry was pressed before Start. Many energy-saving cycles omit heated dry by default. Also check the rinse aid indicator on the dispenser cap (inside the door, lower left). If the window appears empty or shows red, refill with liquid rinse aid.

2

Disconnect power

Replacement Parts

If your diagnostic testing proves the component has failed, you will need a replacement. We recommend OEM parts over aftermarket for water-handling components.

Part Name
Heating Element AssemblyW10518394 · $35–$65

Repair vs. Replace Calculator

Appliance Age (Years)7 Yrs
Labor Approach
Our Verdict
REPAIR
Estimated Cost: $50 (Parts) vs $700 (New Machine)

Frequently Asked Questions

Why do plastic items never dry in a dishwasher?
Plastic has low thermal mass - it cools down quickly after the rinse cycle and does not retain enough heat to evaporate water by the time the door opens. This is normal for all dishwashers. Even with a working heater and rinse aid, plastics will dry less completely than glass or ceramic.
How much rinse aid should I use in a Whirlpool dishwasher?
Fill the rinse aid dispenser (inside the door, lower left cap) until the indicator window shows full. Most WDT series models have a rinse aid dosage setting - if spotting is still present at the default setting, increase the dose one level at a time.

Related Whirlpool Dishwasher Error Codes

Code: NOT-HEATINGWhirlpool Dishwasher Not Heating Water: Diagnosis and Repair GuideCode: F7 E1Whirlpool Dishwasher F7 E1 Error Code: Heater Circuit Fault

Same Fix Works on These Brands

Whirlpool shares the same hardware platform with these brands. The diagnosis and repair steps are identical.

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Models Known to Experience WONT-DRY Errors

This repair applies to most Whirlpool dishwashers with this error code. Common model numbers include:

WDT780SAEM, WDF550SAHZ, WDT730PAHZ, WDT750SAHZ, WDT970SAHZ, WDF518SAHM, WDT720PADE

Last verified for technical accuracy on March 14, 2026