The short answer
When a Blomberg dryer leaves laundry damp, the cause is almost always airflow or load size rather than the heater. Two filters and a heat exchanger have to be clear for a ventless machine to work at all, and a moisture sensor coated with fabric-softener film will end an auto cycle while the clothes are still wet.
What you are seeing
- Clothes are evenly damp at the end of an auto cycle
- Thick items are wet while thin ones are dry
- The cycle ends much earlier than it used to
- The cycle runs to full length and the load is still not dry
- Laundry smells musty when it comes out
- A near-miss symptom: clothes dry but heavily creased, which is a load-size and cycle-selection problem
- Body: How the load comes out narrows the cause: Clothes are evenly damp at the end of an auto cycle. Thick items are wet while thin ones are dry. The cycle ends much earlier than it used to. The cycle runs to full length and the load is still not dry. Laundry smells musty when it comes out. A near-miss symptom: clothes dry but heavily creased, which is a load-size and cycle-selection problem.
Causes, most likely first
- A blocked door filter or plinth filter — Why: airflow is the whole mechanism on a condensing dryer, and either filter alone will leave a load damp after a full cycle.
- A moisture sensor coated with softener film — Why: the sensor bars read conductivity through the laundry, and a film of fabric softener makes wet clothes read dry, which ends the cycle early.
- Overloading the drum — Why: clothes need room to tumble and air needs room to pass; a packed drum leaves a wet core in the middle of the load.
- Laundry that went in too wet — Why: a washer that did not reach its full spin sends far more water to the dryer, and the dryer is then blamed for the washer’s fault.
- Mixed fabric weights in one load — Why: the sensor stops when the load average reads dry, so towels mixed with shirts leave the towels damp every time.
- Lint on the exchanger fins — Why: the slow cause: it reduces capacity gradually, so the machine that dried a load last year cannot dry the same load now.
- Body: Ranked for a ventless machine with a sensor-dry control: First, A blocked door filter or plinth filter: airflow is the whole mechanism on a condensing dryer, and either filter alone will leave a load damp after a full cycle. Second, A moisture sensor coated with softener film: the sensor bars read conductivity through the laundry, and a film of fabric softener makes wet clothes read dry, which ends the cycle early. Third, Overloading the drum: clothes need room to tumble and air needs room to pass; a packed drum leaves a wet core in the middle of the load. Fourth, Laundry that went in too wet: a washer that did not reach its full spin sends far more water to the dryer, and the dryer is then blamed for the washer’s fault. Fifth, Mixed fabric weights in one load: the sensor stops when the load average reads dry, so towels mixed with shirts leave the towels damp every time. Sixth, Lint on the exchanger fins: the slow cause: it reduces capacity gradually, so the machine that dried a load last year cannot dry the same load now.
What to check, in order
- clean both filters, because a single blocked filter accounts for most damp loads.
- wipe the moisture sensor bars inside the drum with a little vinegar on a cloth, which fixes cycles that end far too early.
- dry a half load of one fabric type and see whether the result is normal, which separates loading from the machine.
- check the washer reached a full spin, since laundry that arrives soaking will defeat any dryer.
- Body: Test the cheap causes in the order they occur: First, clean both filters, because a single blocked filter accounts for most damp loads. Second, wipe the moisture sensor bars inside the drum with a little vinegar on a cloth, which fixes cycles that end far too early. Third, dry a half load of one fabric type and see whether the result is normal, which separates loading from the machine. Fourth, check the washer reached a full spin, since laundry that arrives soaking will defeat any dryer.
Checks you can do yourself
- Remove the door lint filter, peel the lint off and rinse it if it feels waxy, then dry it fully — Tools: none — Time estimate: a few minutes
- Switch off at the breaker, open the plinth and rinse the heat-exchanger filter, refitting it only when dry — Tools: none — Time estimate: overnight
- Wipe the metal sensor strips inside the drum with a cloth and a little white vinegar, then wipe dry — Tools: cloth, white vinegar — Time estimate: a few minutes
- Dry a half load of a single fabric type on the normal auto programme and check the result — Tools: none — Time estimate: an hour or more
- Run the washer’s highest spin on the next load before drying, and compare drying time — Tools: none — Time estimate: an hour or more
- Body: A short maintenance run tells you which cause you have: Remove the door lint filter, peel the lint off and rinse it if it feels waxy, then dry it fully (none; a few minutes). Switch off at the breaker, open the plinth and rinse the heat-exchanger filter, refitting it only when dry (none; overnight). Wipe the metal sensor strips inside the drum with a cloth and a little white vinegar, then wipe dry (cloth, white vinegar; a few minutes). Dry a half load of a single fabric type on the normal auto programme and check the result (none; an hour or more). Run the washer’s highest spin on the next load before drying, and compare drying time (none; an hour or more).
Safety first
Safety
Unplug the appliance or switch off its breaker before removing any panel. A capacitor can hold a charge after the power is off. Never run the machine with a filter removed: lint reaching the exchanger is what turns a maintenance job into a repair. Do not clean the finned exchanger with any tool that could bend or pierce it. unplug-before-service
When to stop and call a technician
These are past routine maintenance: Loads stay damp with both filters clean, clear fins and a clean sensor. The cycle ends within minutes of starting, every time. The drum turns but never gets warm at all. Cycle times have doubled compared with when the machine was new. Loads stay damp with both filters clean, clear fins and a clean sensor The cycle ends within minutes of starting, every time The drum turns but never gets warm at all Cycle times have doubled compared with when the machine was new
Nearest pages of the same kind
What this page does not cover
This page is generalized across every dryer sold under the Blomberg name: it separates neither the heat-pump models from the condenser models and one control generation from another, and it names no individual model. Where a family- or model-specific page exists it is linked here and it outranks this one for that machine; at present no page beneath this one narrows to a single family, so treat the ranking above as the brand-level pattern rather than a reading of your serial plate. For the other faults that turn up on this machine, start from Common Blomberg Dryer Problems.
Related pages
- Common Blomberg Dryer Problems
- Blomberg Dryer: Abnormal Noise or Vibration
- Blomberg Dryer: Controls, Display or Error Code
- Blomberg Dryer: Cycle Will Not Run or Complete
- Blomberg Dryer: Door, Latch or Seal Fault
- Blomberg Dryer: Will Not Drain
- Blomberg Dryer: Electrical, Fire or Gas Hazard
- Blomberg Dryer: Not Heating
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
