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Error code reference

Indesit Dryer Error Code F17

Master Relay contacts welded closed.

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What the F17 error code actually means

Your Indesit dryer has detected an internal fault where a small electrical switch inside the control board has become permanently stuck in the on position. This means the control board can no longer properly turn off parts of the dryer's electrical system. The control board needs to be replaced to fix this problem.

Diagnostic procedure

The full F17 procedure

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1
First diagnostic step
Replace module.
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Most common causes of F17

Ranked by how often they cause this code
  1. 1Failed control module with welded relay
  2. 2Electrical surge or power spike
  3. 3Overloaded relay from downstream component fault
  4. 4Control module end-of-life component fatigue

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Questions people ask about F17

What does F17 mean on a Indesit dryer?
F17 means the master relay contacts inside the main control module have welded closed. This is an internal electrical fault within the control board where a key relay switch has become permanently fused in the on position. The dryer displays this code because it can no longer safely control the circuit governed by that relay. The control module must be replaced to resolve the fault.
Is it safe to keep using my Indesit dryer when F17 is displayed?
No, you should stop using the dryer until it is repaired. A welded relay contact means the control board cannot properly de-energize the circuit it controls, which could leave heating or motor circuits powered when they should not be. Continuing to operate the dryer in this condition carries a risk of overheating or other electrical hazards.
How much does it cost to fix an F17 error on an Indesit dryer?
The cost depends on whether you use a technician or replace the module yourself. A control module part typically falls in the range of 50 to 150 dollars or pounds depending on the specific model and supplier. If a technician is hired, labor charges will add to that cost, bringing the total repair estimate to roughly 120 to 300 dollars or pounds depending on your location and the service provider.
Can I fix the F17 error myself, or do I need a technician?
The repair requires replacing the main control module, which involves working with mains voltage components inside the dryer. A technician with appliance repair experience is strongly recommended. If you are confident working with electrical appliances and take proper safety precautions such as disconnecting power before starting, the module swap itself is a straightforward part replacement.
Will resetting the dryer clear the F17 error code?
No, a reset will not clear the F17 error. The fault is caused by a physical condition inside the control module, specifically the relay contacts being welded together. Because the underlying hardware is damaged, the error will return immediately or remain present regardless of any reset attempt. Replacing the control module is the only resolution.

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