What E1 Means
WHICH MACHINES THIS APPLIES TO: the E-series belongs to the Asko Logic and heat-pump tumble dryers - the T408HD, T410HD, T608HX and their siblings. On these the display shows "Error" and a number together with a short line of text, and holding the INFO button brings up the description. The older TD60-generation condenser dryers do not use E-codes at all; the TD60.1 panel shows F1 and F2, which are separate entries here, and the TD60.2, TD60.3, TD70 and TDC44 machines show plain-language messages instead of codes.
WHAT E1 MEANS: the line on the display is "E1 - Thermistor fault. Please check user manuals or call service." The description in Asko's table is "Temperature sensor failure", and the published action is "Call service centre."
WHY A DRYER CARES SO MUCH ABOUT THIS SENSOR: everything a tumble dryer does is regulated by temperature. The control decides how hard to heat, when to back off and when a load is dry partly from what the temperature sensors report. A sensor that has stopped reporting sensibly is not something the machine can work around, so it stops rather than running a heating cycle blind.
WHAT YOU MAY HAVE NOTICED BEFORE THE CODE: cycles that ran far longer than usual, or loads that came out either damp or noticeably over-dried. Those are worth mentioning when you call.
CLASSIFICATION: fault. Asko publishes no owner check for it - the instruction is to call the service centre.
Common Causes of E1
- Temperature sensor failed or out of range
- Connector or wiring to the sensor damaged
- Control unit not reading the sensor
- Airflow so restricted that temperatures ran outside the expected range
🔧 One Safe Check You Can Try
There is no published owner check here, and the sensor is inside the machine, so the useful work is elsewhere. Do the routine maintenance the dryer needs regardless, because a machine running hot through blocked filters behaves very like one with a sensor fault and it is worth taking that off the table: let the dryer cool before opening it, clean the door lint filter thoroughly, and clean the condenser unit if your model has an accessible one - the current heat-pump machines document both as owner tasks and prompt for them in plain language. Empty the water tank. Then note the history: how long cycles were taking before the code appeared and whether the loads were coming out damp or over-dried. If E1 persists after ordinary maintenance, Asko's instruction is to call. Do not remove the back or side panels to look for the sensor; mains wiring and the sealed refrigerant circuit are both behind them.
⚠ Why You Shouldn't Go Further Than That
- Asko publishes no owner procedure for this code beyond calling the service centre.
- The sensors and their wiring sit inside the cabinet at mains voltage, and on a heat-pump dryer the sealed refrigerant circuit is behind the same panels, which is not owner territory.
Opening a panel to inspect or repair something yourself doesn't automatically cancel your manufacturer's warranty — but it can risk accidental damage, and some manufacturers do have specific service conditions. Check your product's warranty terms, or ask us, before deciding.