A musty Speed Queen TR7 nearly always means the tub stayed shut and damp. Speed Queen's guide says to leave the lid open after use so the inside can dry, which helps prevent musty odors, and to clean the upper 2 to 3 inches of the washtub monthly by filling with warm water at the highest setting and using an all-purpose cleaner or a steel wool soap pad. Too little detergent leaves soil behind, and softener that has gummed in the dispenser adds its own sour smell.
Differential
Likely causes of “Speed Queen TR7 top-load washer smells musty, sour or like mildew”, and how to tell them apart
- 1
A closed lid trapping moisture
What separates it A stale smell returns after every load because a closed lid traps moisture
How to confirm Leave the lid open after each use so the tub dries out
- 2
Soil ring at the waterline of the tub
What separates it A greasy band around the upper 2 to 3 inches of the tub
How to confirm Do the monthly cleaning of the upper 2 to 3 inches of the tub
- 3
Softener or detergent residue in the dispenser
What separates it There is a sour smell from the agitator area because softener or detergent residue is in the dispenser
How to confirm Pull the softener assembly off the agitator and clean it
- 4
Wet clothes left in the tub
What separates it There is a mildew smell on the load and not on the tub because wet clothes were left in the tub
How to confirm Take the load out promptly and rewash with more HE detergent
Before you touch a setting
Record this first — changing settings destroys the evidence
- Whether the smell comes from the tub, the dispenser or the clothes
- How long the lid is normally left closed and how quickly loads are removed
- When the tub and softener dispenser were last cleaned
Try in this order
0 of 5 completedOpen the lid
ReversibleLeave it open after use so the tub dries; the guide says this helps prevent musty odors.
Clean the upper tub
ReversibleFill with warm water at the highest setting and scrub the upper 2 to 3 inches with an all-purpose cleaner or a steel wool soap pad.
Clean the softener dispenser
ReversiblePull the assembly off the agitator, split it at the base and soak the housing, cup and funnel in hot soapy water, then snap it back.
Wipe the cabinet
ReversibleWipe the cabinet, by wiping detergent or bleach spills off the cabinet at once, without using abrasive pads.
Run a hot cycle
ReversibleRun a hot wash with a measured amount of HE detergent to flush what you loosened.
Model-specific
What is true of this model and not of its siblings
- Parts for this problem on the TR7 (RepairClinic, 2026-09-20)
- screen mixing valve, part number 24122, at $7.67; assy,dispenser-fabric softener, part number 205225, at $12.44; top load washer drain pump and bracket assembly,, part number 203885P, at $114.24.
- Other models this page answers
- These steps also fit the TC5 classic-clean top-load washer, TR3 top-load washer, TR5 top-load washer, FF7 front-load washer.
Stop boundary
When this stops being a self-service repair
- !If the smell is burning, stop and unplug the washer, then call Speed Queen service
- !If a sewer smell comes from the drain, call a plumber before running the washer
Evidence ledger
Sources behind this answer
A dealer listing giving the TR7's capacity and cabinet size.
Parts and list prices as shown on RepairClinic's parts search for this model number on 2026-09-20.
Exact questions
Common questions
How often should I clean the TR7 tub?+
Monthly, according to the guide's preventative maintenance table.
Should the TR7 lid stay open?+
Yes. Speed Queen says to leave it open after use so the inside dries out.
Does the TR7 clean itself?+
The guide says the washtub is designed to be self cleaning, though it may need rinsing or wiping after unusual loads or if too little detergent was used.
Can I clean it with bleach?+
Liquid bleach goes in the dispenser only, at no more than one cup for a large load or half a cup for a small one.
Why does the smell come back?+
A closed lid or a soil ring on the upper tub is usually the cause; both are covered by the monthly routine.
What if the smell is on the clothes only?+
Wet clothes left in the tub or too little detergent are the likely causes; rewash promptly.