Direct answer
For the Samsung DV42H5000 dryer, a nonturning drum with motor sound commonly crosses the belt, idler, roller or drive-motor boundary. First, stop the dryer and, with power removed, check whether the drum turns unusually freely or binds.
What this covers
- Samsung DV42H5000 dryer (DV42H5000*)
- Samsung dryer; the DV-prefix model number alone does not state electric versus gas — check the rating plate or full model suffix before applying either supply's diagnosis.
- The specific fault this record addresses: heats or runs but the drum does not tumble
What it does not cover
- ×The same symptom on a different Samsung product line, which has its own record and its own cited source
- ×An on-screen error code whose meaning has not been checked against this exact model's manual
- ×Live electrical, gas, sealed-system, internal battery-cell or structural repair — a technician boundary, not a self-service step
Differential
What actually causes this, and how to tell them apart
These are ordered by how often each one is the answer, not by how easy it is to try. The point of the middle column is that two causes producing the same headline symptom rarely produce the same detail — that detail is what tells you which one you have before you change anything.
- 1
The drive belt has broken or slipped off the drum
What separates it With power removed, the drum turns unusually freely by hand — with little to no resistance — because nothing is connecting it to the motor anymore. The motor itself may still be audible when the dryer is turned on, running with nothing attached.
How to confirm A belt that snapped or came off cannot be reinstalled without removing the front or top panel — this is the single most common cause of this exact symptom and normally a documented repair, not a redesign of the whole machine.
- 2
A drum support roller or glide has seized
What separates it The drum resists turning by hand rather than spinning freely, sometimes with a grinding or squealing sound during the attempted heated cycle, and the motor may audibly labor or trip its overload protection.
How to confirm This is a bearing/roller wear issue distinct from a broken belt and is diagnosed by the drum binding rather than spinning free.
- 3
The idler pulley or motor coupling has failed
What separates it Similar presentation to a broken belt — free-spinning drum, motor may run — but the belt itself is confirmed intact when the panel is opened.
How to confirm This is a service diagnosis made once the belt has been visually checked and found present and unbroken.
Before you touch a setting
Record this first — changing settings destroys the evidence
Every item below stops existing the moment a reset, re-pair or settings change is made. Written down first, they are what separates the causes above; recovered afterwards, they are guesswork.
- Whether the drum turns freely, with resistance, or not at all when tested by hand with power removed — this single check separates a belt problem from a binding/seized problem.
- Whether the motor makes any sound at all when the dryer is switched on.
- Any burning-rubber smell, which points to a belt slipping under load before it fully failed.
Disconnect power completely before any inspection
ReversibleThis repair involves moving parts and possibly hot recently-used components — never inspect with the dryer plugged in.
Check whether the drum turns freely, resists, or is seized by hand
ReversibleThis single test distinguishes a broken belt from a bound roller or bearing.
Arrange service for the confirmed belt, roller, idler or motor coupling fault
ReversibleThis is a panel-off repair on nearly every model and not typically a customer-serviceable part on its own.
Confirm smooth, quiet rotation through a full unloaded cycle before drying a normal load
ReversibleVerifies the repair before committing laundry to it.
Model-specific
What is true of this model and not of its siblings
Generic advice for the product line fails here. Each item below is a property of this specific model family that changes which of the steps above apply to you.
- Model scope
- DV42H5000*. Samsung dryer; the DV-prefix model number alone does not state electric versus gas — check the rating plate or full model suffix before applying either supply's diagnosis.
- Fuel — confirm ELECTRIC or GAS
- This entry series came in electric (DV42H5000EW) and gas (DV42H5000GW) — check the suffix. Electric no-heat = element/240V half-breaker/thermal fuse; gas no-heat = igniter/valve coils/flame sensor/gas supply.
- Venting
- A vented dryer — clogged lint screen or blocked duct causes long drying and overheating. Clean both regularly.
- Feature tier
- An older entry Samsung dryer with Sensor Dry; typically no Wi-Fi, so a long cycle is airflow or a mixed load, not a smart feature.
- Symptom boundary
- This record covers Samsung DV42H5000 dryer when it heats or runs but the drum does not tumble. A different symptom on the same hardware, or this symptom on a different Samsung product line, has its own record with its own causes and its own cited source.
Stop boundary
When this stops being a self-service repair
Continuing past any one of these costs more than the repair saves — in safety, in warranty, or in evidence a technician needs.
- !Do not run the dryer at all with a non-turning drum — clothes sitting against a stationary heating path is a fire risk, not just an inconvenience.
- !Any scraping metal sound, burning rubber smell, or exposed internal parts means stop and call for service rather than continuing to test.
Evidence ledger
Sources behind this answer
Visible sources support the visible claims. Home Product Support records the publisher, the fact used and the review date; community reports can suggest an issue but do not become a published fact on their own.
Where the manufacturer's article stops. Samsung Support publishes this as "Samsung washing machine information and error codes". Samsung's own washer troubleshooting and error-code article; covers filling, draining, spin and unbalanced-load conditions. What that article does not carry is the model boundary — it is written for a product line, and DV42H5000* is the scope applied here. Where a control label, terminal, indicator pattern or reset sequence differs on your unit, the manual for that exact model is the authority, not this page and not the article.
Exact questions
Common follow-ups
My older Samsung DV42H5000 isn't drying well.+
Start with airflow regardless of fuel: clean the lint screen every load and clear the exhaust duct — a blocked vent is the top cause of poor drying on any vented dryer. If there is no heat at all, check whether yours is electric or gas: electric points to a half-tripped 240V breaker or the element, gas to the igniter and valve. Cleaning the moisture-sensor bars also helps if Sensor Dry is ending cycles early.
The dryer heats and the motor runs, but the drum isn't turning.+
With power removed, check whether the drum spins freely by hand — almost no resistance means the drive belt has broken or come off, which is the most common cause of exactly this symptom and is normally a panel-off repair.
The drum won't turn at all, even by hand.+
That's different from a broken belt — a seized roller, glide or bearing binds the drum rather than leaving it free-spinning. This points to a wear part needing service rather than a snapped belt.
Does this answer apply to every Samsung model?+
No. It is scoped to DV42H5000*. Samsung dryer; the DV-prefix model number alone does not state electric versus gas — check the rating plate or full model suffix before applying either supply's diagnosis.
What should I record before troubleshooting drum not turning or belt?+
Record the complete model identifier, exact message or indicator, software/firmware where visible, the operating stage and what still works.
Why is a factory reset not the first step?+
A reset can erase accounts, networks, maps, schedules or preferences without distinguishing drum not turning, belt. The ordered checks preserve that evidence.
When should I stop and use qualified service?+
Do not run with a nonturning drum, scraping, burning rubber or exposed internal parts.
Answer for the exact device and software version shown above.