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Error code reference

ASKO Dryer Error Code F1

Overfilling-the condensation water tank is full, condensing waterpump or hoses blocked, float/float switch defective, or control unit faulty (pump…

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What the F1 error code actually means

The F1 error means your dryer has detected that its internal water collection tank is full, or that something is preventing the water from draining properly. Your dryer has stopped to prevent water from spilling inside the machine. Try emptying the water tank and restarting the dryer. If the error returns, the issue is likely a blockage or a component failure that will need further attention.

Diagnostic procedure

The full F1 procedure

Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.

MyPros+ · DiagnosticsStep 1 preview
1
First diagnostic step
Check if the customer has emptied the tank and restarted the machine. Clean hoses and check voltage and resistance in the drain pump. Check that the float has not got stuck and check the function of the microswitch. Replace control unit if pump does not start.
More steps, wiring diagram references, and verified part numbers
Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.
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Most common causes of F1

Ranked by how often they cause this code
  1. 1Full condensation water tank
  2. 2Blocked drain hoses
  3. 3Stuck or defective float
  4. 4Failed condensing water pump
  5. 5Faulty control unit

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Questions people ask about F1

What does F1 mean on a Asko dryer?
F1 on an Asko condenser dryer indicates an overfill condition in the condensation water system. The dryer has detected that the water collection tank is full, that the drain pump or hoses are blocked, or that the float switch has triggered unexpectedly. The machine stops automatically as a safety measure to prevent water from overflowing inside the appliance.
Is it safe to keep using the dryer when F1 is displayed?
No, you should not continue running the dryer while F1 is active. The machine stops automatically for a reason: continuing to operate with a full or malfunctioning condensate system could cause water to overflow into internal components, potentially damaging the dryer or creating moisture-related hazards. Resolve the underlying cause before resuming normal use.
How much does it cost to repair an Asko dryer showing F1?
Repair costs vary depending on the root cause. If the fix is simply emptying the tank or cleaning hoses, there is no parts cost. Replacing a defective float switch or drain pump typically costs between $80 and $200 including parts and labor, depending on your location and the specific components required. Replacing a faulty control unit is the most expensive scenario, generally ranging from $200 to $450 or more.
Can I fix the F1 error myself without calling a technician?
In many cases, yes. Start by emptying the condensation water tank and restarting the machine, as a full tank is the most common cause. If the error returns, inspect the drain hoses for blockages and clean them. If the float appears stuck, carefully free it by removing any debris. Electrical testing of the pump and control unit typically requires a multimeter and some technical comfort, so those steps are better suited to experienced DIYers or a technician.
Will resetting the dryer clear the F1 error?
A reset may temporarily clear the display, but the F1 code will return if the underlying problem has not been addressed. You must empty the water tank, clear any hose blockages, and verify that the float and pump are functioning correctly. If the pump or control unit has failed, a reset alone will not resolve the fault.

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