The short answer
An automatic cycle on this platform is decided by sensors, so the sensors are where a cycle that ends at the wrong moment is diagnosed. Ranked first on this platform: Coated moisture sensor bars. The checks below follow that ranking, and the first of them need no tools and no panel removed.
What you observe
- The cycle ends within minutes of starting, with a soaking load — An immediate end is a sensor reading, not a heating fault.
- It behaves normally on medium loads and badly on very small or very large ones — A fault that depends on load size is a load-size fault.
- The cycle ends early and the load is still damp and warm — Warm and damp together is heat without airflow.
- NEAR MISS — only heavy items are still damp — Mixed loads dry at different rates, and a towel in with shirts will always be the last thing dry.
Causes, most likely first on this platform
- Coated moisture sensor bars — An automatic cycle measures dryness through two metal strips inside the drum. It ranks first on this platform because the machine measures dryness through two metal strips in the drum, and fabric softener builds an insulating film on them that makes the load read dry from the first minute — so the cycle ends within minutes with a soaking load.
- Load size, at either end — Automatic cycles need the load to tumble against the sensors. It ranks second here because almost everything on this platform is board-controlled, so a symptom that looks mechanical is frequently a sensor reading the board is acting on.
- A restricted exhaust — A dryer works by carrying moisture out of the drum in moving air. It ranks third rather than higher: real on this platform, and less common than the causes above it.
- The control board or the cycle selector — Where the sensors, the vent and the load are all clean, what is left is what interprets them. It is a real cause and it sits last deliberately: it is the expensive answer and the least likely one. Ranked fourth: worth checking once the causes above have come back clean.
Check in this order, and why
- Find the two metal strips inside the drum and look at them in a good light — A dull film is visible once you know where to look. It leads because it tests the top-ranked cause.
- Run a medium load on the same cycle and compare — It is the cheapest controlled experiment available. Tests the second-ranked cause.
- Feel the airflow at the outside vent hood while the machine runs — Weak airflow outside with a hot drum inside is the whole diagnosis. Tests the third-ranked cause.
What an owner can safely check
- Wipe the sensor bars with a cloth and a little rubbing alcohol or white vinegar — No abrasives: the strips only need to be clean, not polished.
Tools: clothAbout 10 min
- Dry a medium half-drum load on the same automatic cycle and compare the result — Split very large loads rather than forcing them.
About 20 min
- STOP before anything behind a fixed panel, and note what each check showed — Everything past this line is measured rather than looked at, and measuring it safely needs the power off and a meter.
Before you open anything
Safety
Unplug the dryer or switch off its breaker before removing any panel; on a gas machine close the gas shut-off valve too.
When to call a technician
Call when the vent, the filter and the load have all been eliminated and the cycle still ends wrong, because what remains is a sensor, a thermistor or a control and all three are measured rather than looked at.
Nearest pages of this class
What this page does not cover
This page is written for the Midea dryer as a class, not for one family or one model line. Where a family- or model-specific page exists for your unit, that page is the more specific answer and the one to read first. Deliberately not here: part numbers, wiring colours and disassembly order, which differ by family.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
