The short answer
A condenser or heat-pump dryer that stops with a full-tank report usually has a tank that is not seated, a condenser blocked with lint, or - on a plumbed machine - a drain hose that has been kinked or lifted. All three are owner-checkable.
What the machine reports
- Full-tank indication with an empty tank — The tank is not seated, or the contacts are wet.
- The tank fills much faster than it used to — Normal for wet loads; check the condenser as well.
- The cycle stops early and repeatedly — The machine pausing on the tank condition.
- Water under the machine rather than in the tank — See the leak page as well as this one.
- A plumbed machine filling its tank again — The drain hose is kinked, lifted or disconnected.
- Not this fault: no tank anywhere on the machine — You have a vented dryer and this page does not apply.
Ranked for condensing machines
- Tank not fully seated — First, and it needs no parts at all.
- Condenser unit or its filter blocked with lint — Second, and it is user-cleanable on most machines.
- Drain hose kinked or set too high on a plumbed machine — Third.
- Condensate pump or its filter blocked — Fourth, and it shows as a tank filling on a plumbed installation.
- Tank sensor contacts wet or dirty — Fifth, and wiping them is enough.
- Pump or control failure — Last.
Work through it in this order
- Empty the tank and push it firmly home — The leading cause, and it takes a minute.
- Remove and rinse the condenser or its filter — Lint here blocks the whole condensate path.
- Wipe the tank seat and its contacts dry — Damp contacts imitate a full tank.
- On a plumbed machine, follow the hose for kinks and height — Routing causes most plumbed failures.
Owner checks
- Take the tank out, empty it, and refit it until it seats squarely — Listen or feel for it to locate properly.
About 10 min
- Open the condenser access and rinse the unit under a tap — Follow the machine’s own cleaning guidance for the part.
Tools: soft brushAbout 25 min
- Clean the lint filter and the filter housing — Lint that passes the filter ends up in the condenser.
Tools: vacuumAbout 10 min
- Wipe the tank housing and visible contacts dry — It clears phantom full-tank reports.
Tools: dry clothAbout 10 min
- Trace a plumbed drain hose for kinks and check its height — A hose lifted too high will not drain.
Tools: torchAbout 20 min
- Stop before dismantling the condensate pump — It sits inside the cabinet beside mains wiring.
Water inside a mains appliance
Safety
Unplug the appliance or switch off its breaker before removing any panel. A capacitor can hold a charge after the power is off. Condensate carries lint and fabric residue, so empty it into a drain rather than a food sink. Dry any spilled water before moving the machine, and never run the dryer with the condenser access open.
When to call
Call when the tank seats correctly, the condenser is clean and the machine still reports a full tank, because the pump and the sensing circuit are inside. Call as well for a plumbed machine whose hose is correctly routed and which still fills its tank. If water is appearing under the machine rather than in the tank, treat it as a leak and stop using it.
Related pages
Scope of this page
Generalized across dryer families under this badge and written for condensing machines; vented machines have no drain path. Where a family-specific or model-specific page exists it is the narrower answer. Not here: tank capacities, pump part numbers and hose height specifications.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
