--- title: "Dryer signal S4" description: "Dryer signal S4: asko dryer — reported by blinking lights rather than by a code. The TD70 platform changed its code form across revisions — L-numbers, then…" url: "https://askomiami.support/error-codes/dryer-s4/" date_modified: "2026-09-13" Appliance type: "Dryers" --- # Dryer signal S4 ### What the appliance is actually reporting The TD70 platform changed its code form across revisions — L-numbers, then F-numbers, then S-numbers, then J1 and LCD strings — for the same machine family. The revision is part of the reading. The TD70.2 revision defines codes S4 through S9 and the published page does not render their text. They concern the filter, the anti-siphon device, the reversing valve, the hoses and the sensors, and that is as much as the source supports. We publish the range and its subject rather than inventing meanings for each number — a decoded S-code you find elsewhere is not coming from a manual. ### Where this appears, and which table it belongs to On the appliance’s own display. Photograph it before you cut the power: a display that has been cleared has taken the evidence with it, and there is no way to ask the machine for it again. Then check the model, because this make changed hands in 2016 and the two generations share no code string. The same characters mean different things on a Classic ERC oven, an ER-series range and a Modernist induction cooktop, and a meaning read off the wrong table is worse than no meaning at all. ### Which machines this one applies to TD70.2. The same number on a different appliance of this make is a different page and often a different repair, which is why this archive is organized by appliance rather than by number. This maker documents codes on 8 of the appliance types this site publishes — cooktop, dishwasher, dryer, microwave, oven, range, refrigerator and washer — and publishes none at all for commercial line, freezer, microwave, oven, range, range hood and refrigerator. Those appliances have symptom pages here and no code pages, which is the honest answer rather than borrowing a table from the machine next door. ### What to do about it - Record the exact number and the model; a service tool decodes these properly. - The three filters and the condenser are still worth clearing first, because they are free. ### Where this goes next The job this usually becomes is [diagnostic visit](/services/diagnostic-visit/), and that page carries a starting figure and the reasons that move it. If it turns out to be nothing — and on this make a real share of these are modes, reminders and settings rather than problems — the visit ends there and you pay the diagnostic and nothing else, or call [(305) 363-1406](tel:+13053631406) and describe what the panel is doing before booking anything. What the lights are telling you What the appliance is actually reporting The TD70 platform changed its code form across revisions — L-numbers, then F-numbers, then S-numbers, then J1 and LCD strings — for the same machine family. The revision is part of the reading. The TD70.2 revision defines codes S4 through S9 and the published page does not render their text. They concern the filter, the anti-siphon device, the reversing valve, the hoses and the sensors, and that is as much as the source supports. We publish the range and its subject rather than inventing meanings for each number — a decoded S-code you find elsewhere is not coming from a manual. Where this appears, and which table it belongs to On the appliance’s own display. Photograph it before you cut the power: a display that has been cleared has taken the evidence with it, and there is no way to ask the machine for it again. Then check the model, because this make changed hands in 2016 and the two generations share no code string. The same characters mean different things on a Classic ERC oven, an ER-series range and a Modernist induction cooktop, and a meaning read off the wrong table is worse than no meaning at all. Which machines this one applies to TD70.2. The same number on a different appliance of this make is a different page and often a different repair, which is why this archive is organized by appliance rather than by number. This maker documents codes on 8 of the appliance types this site publishes — cooktop, dishwasher, dryer, microwave, oven, range, refrigerator and washer — and publishes none at all for commercial line, freezer, microwave, oven, range, range hood and refrigerator. Those appliances have symptom pages here and no code pages, which is the honest answer rather than borrowing a table from the machine next door. What to do about it Record the exact number and the model; a service tool decodes these properly. The three filters and the condenser are still worth clearing first, because they are free. Where this goes next The job this usually becomes is diagnostic visit, and that page carries a starting figure and the reasons that move it. If it turns out to be nothing — and on this make a real share of these are modes, reminders and settings rather than problems — the visit ends there and you pay the diagnostic and nothing else, or call [(305) 363-1406](tel:+13053631406) and describe what the panel is doing before booking anything. --- **[Read full article: Dryer signal S4](https://askomiami.support/error-codes/dryer-s4/)**