Bosch Dryer Not Draining in Clearwater: A Homemade Drain Tube Extension Was the Culprit
- Symptom
- Dryer wouldn't drain; the lint filter was clean.
- Cause
- A past DIY extension had a narrower tube inserted inside the drain line, creating a bottleneck that clogged.
- Fix
- Removed the inserted section and reconnected the original drain tube, which was long enough on its own.
A client with a rental house in Clearwater called about an old Bosch condensation dryer that wouldn’t drain.
Ruling out the obvious first
The lint filter is the usual suspect for drainage trouble, but this one checked out clean — the problem was somewhere else.
A homemade extension, and a hidden bottleneck
Tracing the drain line further back turned up the real cause: at some point, someone had extended the drain tube by fitting a smaller-diameter plastic tube inside it. That created a narrowed section partway down the line — and it was exactly that narrow point where debris had built up and clogged the drain.
An unnecessary fix
The original drain tube already had enough length to run on its own — there was no actual need for the extension in the first place. Removing the narrowed inserted section and reconnecting the original tube cleared the clog and restored normal drainage.
Result
The dryer is draining properly again. If an older dryer stops draining and the lint filter is already clean, it’s worth checking the drain line itself for a past repair or modification that may have narrowed it down. See our dryer repair page for what else we typically look at.
FAQ
Why won't my condensation dryer drain if the filter is clean?
Check the drain line itself — clogs or past modifications that narrow the tube can block drainage.
Is it OK to extend a dryer drain tube?
Only without narrowing it — inserting a smaller tube creates a choke point where debris collects.