What S4-S9 means on your Asko dryer (asko dryer s4 s9)
Asko dryer s4 s9 codes are confirmed to exist on the TD70.2 panel — the service manual lists this block as covering a family of filter, anti-siphon-valve, reversing-valve, hose, and sensor failures — but the individual meaning attached to each specific number in that S4 through S9 range is not something we could extract from the available manual page. That is a gap in the source document, not a gap in our research, and it would be dishonest to guess which of those six numbers points to a filter problem versus a valve problem versus a hose problem. If your TD70.2 dryer is showing any code in this range, treat it as confirmation that something in that general component family needs attention rather than as a precise diagnosis.
Symptoms
The symptoms below are the ones that pin this problem on your Asko dryer rather than a similar-looking problem elsewhere in the machine. A dryer can show them one at a time or all together, slowly over weeks or suddenly after a surge, a spill, or a recent install-and-test.
- The display shows a specific code somewhere between S4 and S9
- The cycle stops or refuses to start with that code showing
- Symptoms otherwise vary depending on which underlying problem triggered the code
- The exact on-screen number is consistent for the same underlying problem on a given unit
Common causes
More than one problem can drive the behavior you are seeing on your Asko dryer, so it pays to consider the likeliest causes first. Ruling them out in order shows whether your dryer has an owner-fixable issue or one that calls for a technician and the correct components.
- Lint filter assembly problem — the filter or its associated sensor is not reading correctly
- Anti-siphon valve issue — a valve in the condensate drain path is stuck or malfunctioning
- Reversing valve failure — a valve involved in the condenser airflow path is not switching correctly
- Blocked or damaged internal hose — a hose in the water or air path has kinked, cracked, or clogged
- Sensor failure elsewhere in the S4-S9 family — one of several sensors covered by this code range is reporting an out-of-range value
Troubleshooting steps you can try
Attempt the following on your Asko dryer step by step before calling out an engineer. Anything on the dryer that involves mains power, gas, a hot cavity, water, or a sealed component is where you should stop and bring in a qualified technician.
- Note the exact code shown — write down the full number before calling for help.
- Clean the lint filter thoroughly in case the code relates to filter sensing.
- Empty and reseat the condensate tank, since drain-path issues can sometimes present in this range too.
- Power-cycle the dryer once to see whether the code was a one-off reading.
- If the code returns, book service and report the exact code number — a technician can cross-reference it against Asko’s internal service documentation, which is not publicly available.
Parts a technician may replace
Once the problem on your Asko dryer is confirmed, the parts a technician is most likely to inspect, test, or replace are the lint filter assembly, anti-siphon valve, reversing valve, internal hoses, and various sensors. Each one is matched to your dryer by model, serial, and Art. No. so the exact component fits this dryer, and only genuine OEM or trusted-supplier parts go back into it — never a generic stand-in.
When to call a technician
Because Asko has not published individual meanings for S4 through S9, an experienced technician needs the exact on-screen code and diagnostic access to the TD70.2 board itself to identify which of the filter, valve, hose, or sensor failures is present. Rated Medium severity, this condition does not put your Asko dryer at immediate risk; still, if S4-S9 persists on the dryer after you have worked through the steps, let a technician pin down the cause before replacing anything. We are not affiliated with Asko, Gorenje, or Hisense; your dryer is repaired independently by experienced technicians with genuine OEM or trusted-supplier parts and a 30-day labor warranty. When you book, have your Asko dryer’s model, serial, and Art. No. to hand so the exact part for your build is matched before the visit and S4-S9 is put right in as few trips as possible.
Related help and Asko resources
If S4-S9 lingers on your Asko dryer after these steps, book Asko dryer repair, browse our collection of dryer error-code guides, follow our step-by-step repair guides, schedule service for a call-out, or look up your region on our locations page. You may also want the related S1 condensate tank overflow for your Asko dryer. Manufacturer documentation and specifications for your Asko dryer are hosted at us.asko.com.
