Whirlpool F24
Water Temperature Error
Low severityExpert Guide
SeverityLow
What Your Machine Is Actually Telling You
F24 means the NTC thermistor reads a temperature that doesn't match what the CCU expects. Different from F05 (sensor dead) — F24 means the sensor provides a reading, but the water temperature doesn't align with the selected cycle.
Common causes:
1. Water lines reversed (20%) — hot connected to cold and vice versa.
2. NTC sensor drift (20%) — reading inaccurately.
3. Hot water heater off (15%) — no hot water supply.
4. Heating element weak (15%) — partially failed.
5. Inlet valve fault (10%) — wrong valve opening.
6. NTC wiring (10%) — intermittent.
7. CCU (10%) — temperature logic error.
Common causes:
1. Water lines reversed (20%) — hot connected to cold and vice versa.
2. NTC sensor drift (20%) — reading inaccurately.
3. Hot water heater off (15%) — no hot water supply.
4. Heating element weak (15%) — partially failed.
5. Inlet valve fault (10%) — wrong valve opening.
6. NTC wiring (10%) — intermittent.
7. CCU (10%) — temperature logic error.
What You're Probably Seeing Right Now
- F24 during heated cycles.
- Water is scalding hot on cold setting — lines reversed.
- Water is cold on warm/hot — no hot supply.
- F24 is intermittent.
DIY Fix — From Easiest to Hardest
1
Check Hot Water Supply (2 minutes)
1. Run hot water from nearest faucet.
2. Does it get hot? If not: water heater issue.
3. If yes: check hose connections.
2. Does it get hot? If not: water heater issue.
3. If yes: check hose connections.
2
Verify Hose Connections (5 minutes — Fixes 20%)
1. Check behind washer.
2. Hot hose to hot inlet (usually left/red).
3. Cold hose to cold inlet (usually right/blue).
4. If reversed: swap them.
2. Hot hose to hot inlet (usually left/red).
3. Cold hose to cold inlet (usually right/blue).
4. If reversed: swap them.
3
Test NTC Sensor (5 minutes)
1. Unplug.
2. Find NTC on element.
3. Measure: 8-12kΩ at room temp.
4. Compare to known-good values.
5. Replace if readings are off ($10-25).
2. Find NTC on element.
3. Measure: 8-12kΩ at room temp.
4. Compare to known-good values.
5. Replace if readings are off ($10-25).
4
Test Heating Element (5 minutes)
1. Measure: 20-40Ω = good.
2. Ground test: must be OL.
3. Replace if faulty ($20-50).
2. Ground test: must be OL.
3. Replace if faulty ($20-50).
When to Call a Pro
- •Inlet valve — $80-$200 installed.
- •Element + NTC — $100-$250.
- •CCU — $200-$500.
What It'll Cost You
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