LG WM3670HWA washer smells musty or moldy
Cause 1 of 3Detergent residue and dirt build up in the tub, on the door gasket or in the drain pump filter. Source: Troubleshooting: Before Calling for Service; Maintenance: Tub Clean, pp. 30, 37
First checkRun Tub Clean; if there is a musty smell, run it once a week for 3 weeks in a row.
Causes and checks
Detergent residue and dirt build up in the tub, on the door gasket or in the drain pump filter. Source: Troubleshooting: Before Calling for Service; Maintenance: Tub Clean, pp. 30, 37
- Run Tub Clean; if there is a musty smell, run it once a week for 3 weeks in a row. See Run Tub Clean.
- Clean the door gasket. See Clean the door seal.
- Clean the drain pump filter. See Clean the drain pump filter.
The drain hose is kinked or clogged, so drain water flows back into the tub. Source: Troubleshooting: Before Calling for Service, p. 37
- Make sure the drain hose is not kinked or clogged.
Wrong detergent: only HE detergent for front-loaders should be used. Source: Troubleshooting: Before Calling for Service, p. 37
- Switch to HE detergent recommended for front-loading washers.
All 3 causes checked. Contact LG Customer Information Center: 1-800-243-0000.
Service
If the checks above do not clear it, contact LG Customer Information Center: 1-800-243-0000, lg.com/us/support. United States (Canada: 1-888-542-2623). Source: Using Smart Diagnosis, p. 38
Other WM3670HWA problems
- Door does not open when the cycle pauses or finishes2 causes in the manual. First: the tub is too hot. A safety lock keeps the door shut to prevent burns.
- Washer does not turn on2 causes in the manual. First: the plug is not in properly.
- Washer vibrates, thumps or is noisy4 causes in the manual. First: the shipping bolts are still fitted.
- Water leaks around the washer2 causes in the manual. First: A faucet or water line leaks or is loosely connected.
- Banging noise when the washer fills2 causes in the manual. First: plumbing in the home moves or flexes when the water valves in the washer shut off. This is not caused by a defect in the washer.
Sources
- Owner's Manual, Washing Machine WM3670H*A. LG Electronics Inc. Document MFL68639738, revision ver.081KCH/BB, 89 pages, en-US. gscs-b2c.lge.com. Listed on the manufacturer's support page. Retrieved 13 November 2026.
Page numbers are the numbers printed in the manual. Where this page and the manual differ, follow the manual.