What L4 means on your Asko dryer (asko dryer l4)
An asko dryer l4 problem tells you the condensate collection tank on your TD70.1 Type A dryer has filled to the point where its microswitch has physically opened, and the machine has stopped drying rather than risk overflowing the tank. This is the single most common alert on condenser-style Asko dryers because every load of laundry adds water to that tank. The same condition is renumbered F10 on the next TD70.1 board revision and S1 on TD70.2 and TD70.3 — three different labels for the identical full-tank event, which is exactly the kind of mismatch that makes cross-model advice on Asko dryers unreliable.
Symptoms
What your Asko dryer is doing should match the list below if this is genuinely the problem rather than one that only resembles it. The dryer may present one symptom or many, sometimes over several cycles and sometimes right after a power cut, a heavy load, or a recent installation.
- The display shows L4 and the cycle pauses or stops
- The condensate tank feels heavy or is visibly full when removed
- A “tank full” icon or light may accompany the L4 text on some panels
- The dryer restarts normally once the tank is emptied
Common causes
Different underlying problems can surface the same way on your Asko dryer, so the causes below run in order of probability. Clearing them one by one separates a quick check on the dryer from a repair that genuinely needs trained service and genuine parts.
- Condensate tank genuinely full — normal operation; the tank has simply reached its capacity for the load size
- Tank not seated correctly — a partially inserted tank can leave the microswitch in the open position even when not full
- Stuck or dirty microswitch — residue or wear on the switch can cause a false full reading
- Kinked or blocked internal drain path — on models with an optional direct drain hose, a blockage can back water up into the tank faster than expected
Troubleshooting steps you can try
Before service is booked, walk through this checklist on your Asko dryer in order — many problems are resolved without a visit. Whenever a step reaches live voltage, gas, a hot oven cavity, water, or a sealed component on the dryer, that is your cue to call in a technician.
- Remove the condensate tank and empty it into a sink or drain.
- Wipe the tank rim and the cabinet opening it slides into before reinserting.
- Push the tank fully home until it clicks or seats flush with the cabinet.
- Restart the cycle and confirm L4 clears.
- If a connected drain hose is fitted, check it for kinks along its full length.
Parts a technician may replace
Depending on what the diagnosis turns up, a technician working on your Asko dryer may inspect, test, or replace the condensate tank, tank microswitch, and drain hose (where fitted). The correct part for your dryer is matched from its model, serial, and Art. No., and genuine OEM or trusted-supplier components go back in rather than generic substitutes, so the dryer keeps its performance and its long service life.
When to call a technician
L4 that returns immediately after an empty tank is correctly reseated needs an experienced technician to test the tank microswitch on your TD70.1 Type A dryer. There is no emergency here given the Low severity, but if your Asko dryer keeps throwing L4 after the checks above, let a technician diagnose the dryer before any part is fitted. We repair your Asko dryer as an independent provider, not an arm of the manufacturer, using experienced technicians and genuine OEM or trusted-supplier parts, with a 30-day warranty on the labor we put into the dryer. Booking your Asko dryer goes smoothest when you have its model, serial, and Art. No. ready, since that pins the exact part for the dryer before the visit and shortens how long L4 takes to fix.
Related help and Asko resources
To settle a stubborn L4 on your Asko dryer, book Asko dryer repair, explore our further dryer error-code guides, consult our step-by-step repair guides, schedule service at your convenience, or find coverage on our locations page. For a closely related problem on your Asko dryer, see F10 condensate tank full. Manufacturer specifications and manuals for your Asko dryer can be found at us.asko.com.
