Tumble Dryer Taking Too Long to Dry Clothes
When drying times stretch from the usual 45–60 minutes to well over 90 minutes, with clothes coming out damp, the dryer is running but not doing its job efficiently. This is rarely a single dramatic failure — it's usually a combination of reduced airflow and reduced heat.
Common causes
- Lint buildup throughout the vent system reducing airflow
- An exhaust vent that's too long, has too many bends, or exits with a restrictive cap
- A heating element that's partially failed, delivering some but not full heat
- Overloading the drum beyond the machine's rated capacity
- A moisture sensor that's dirty or miscalibrated, ending cycles early on sensor-based models
How to check it
- Clean the lint filter before every load — this alone resolves a large share of slow-drying complaints.
- Trace and clean the full vent run from the dryer to the exterior wall cap.
- Wipe down the moisture sensor strips inside the drum (usually two metal strips near the door) with a soft cloth and rubbing alcohol.
- Reduce load size and see if drying time improves — if it does, the issue is airflow-related, not a component failure.
Fixing it
Vent cleaning is a DIY job with a vacuum and a vent brush kit, and it should be done at least twice a year regardless of symptoms. If the vent run is unusually long or has too many 90-degree bends, consider a booster fan or a shorter, straighter route where possible. Moisture sensor strips just need a wipe-down to restore accurate readings.
When to call a technician
If airflow is confirmed clear and drying times are still excessive, a partially failed heating element or a faulty thermostat may be delivering inconsistent heat, which needs testing with a multimeter to confirm.
Prevention tips
Split unusually large loads into two smaller ones rather than pushing the drum to capacity — airflow around the clothes matters as much as heat output. Wipe the moisture sensor strips monthly if your household does frequent laundry, since a film of fabric softener residue on the sensors is a surprisingly common and easily missed cause of early cycle cutoffs.
Quick questions
Could my drying times be slow because of the weather? Humid conditions can add a few minutes to a cycle, but a jump from 45 minutes to 90+ minutes points to a mechanical or airflow cause rather than the weather.
Do all dryers use moisture sensors? No — some older or budget models rely purely on a timer, in which case sensor cleaning won't apply and the focus should stay on airflow and heat output.
Parts and repair notes
Slow drying rarely requires ordering parts at all — in a large share of cases, a thorough vent clean resolves the issue on the spot during a single visit. Where a moisture sensor or thermostat genuinely needs replacing, both are small, inexpensive components that most technicians carry as standard stock, keeping repair visits for this fault relatively quick and low-cost compared to motor or drum work.
Related issues to watch for
Slow drying that develops gradually over several months, rather than appearing suddenly, points more strongly toward a vent clog building up over time than a sudden component failure. If drying times suddenly double overnight rather than creeping up gradually, treat it as a more urgent fault and check the heating element and thermal fuse directly.