The short answer
A Haier dryer that shuts down partway through is nearly always reacting to restricted airflow rather than suffering a control fault: the cabinet overheats, a thermostat opens, and the machine stops to protect itself. On this machine the platform is high volume and widely shared, so the parts are easy to get and the failure pattern is well known, which is why the vent leads the list. That also makes this a safety job rather than a convenience one.
What you observe
- It ends almost immediately on an auto-dry cycle — The moisture sensor thinks the load is dry, usually because it is dirty or the load is tiny.
- It stops at the same point every time — A repeatable temperature condition rather than an intermittent electrical fault.
- It restarts after cooling for a while — The signature of a thermostat resetting, and proof that heat is the reason.
- NEAR MISS: it runs the whole cycle and nothing is dry — That is a heating or airflow fault of a different kind, and the heating page covers it.
Causes, most likely first on this build
- Moisture sensor fooled by softener film or a small load — Ranked first on this build: a compact drum plus regular softener use coats the sensor bars quickly, and the machine then calls a wet load dry.
- Restricted lint filter or vent duct — Second: the commonest cause of a dryer that stops early on any build, and the only one that is also a fire risk.
- Cycling thermostat or thermal cut-out opening — Third: a thermostat opening is a symptom of airflow, so clear the duct before condemning it.
- Duct crushed behind the machine, or the outside flap stuck shut — Last: quick to check when the machine is pulled out, and free to fix.
Check in this order, and why
- Feel the cabinet and the exhaust when it stops — Very hot means a thermostat opened, which means airflow. Cold means look elsewhere.
- Run a timed cycle instead of an auto cycle — If a timed cycle completes, the moisture sensor is the fault and not the heat path.
- Check whether it restarts after cooling — A machine that runs again once cool has a thermostat resetting, which confirms heat is the cause.
What an owner can safely check
- Wash the lint filter in warm soapy water and check light passes through it — Softener film blocks a filter that looks perfectly clean.
Tools: warm soapy water, brushAbout 15 min
- Clear the vent duct end to end and check the outside flap opens — Brush and vacuum from both ends and watch the flap while the machine runs.
Tools: vent brush, vacuumAbout 45 min
- Wipe the moisture sensor bars inside the drum with a little rubbing alcohol — A film on the bars ends an auto cycle almost immediately.
Tools: cloth, rubbing alcoholAbout 10 min
- STOP HERE if the next step needs the cabinet open or a meter on live terminals — That is where an owner check ends and a service call begins.
Before you open anything
Safety
Switch off at the breaker before removing any panel, and remember a capacitor can hold a charge after the power is off. A thermostat or cut-out that has opened is telling you the machine overheated, so clear the duct rather than replacing the part and carrying on. On a gas dryer, if you smell gas, do not switch anything on or off, leave the building, and call the gas utility or the emergency services from outside.
When to call a technician
Call once the filter and duct are clear, the sensor bars are clean and a timed cycle still stops early, because the next step is a meter on the thermostats and the cut-out. Call at once if you smell burning or hot lint during a cycle, and leave the breaker off until someone has looked. Parts for this platform are stocked widely and a technician will usually carry the common ones, so a confirmed diagnosis and the repair often happen in the same visit.
Nearest pages of this class
What this page does not cover
This page covers the Haier dryer as a class rather than one family or model line. Thermostat and sensor part numbers, duct sizing for individual installations, panel fixings and the control variants fitted to particular builds are deliberately not here. Where a family or model page exists for your unit, it is the more specific answer and the one to read first; the nearest pages of this class are linked just above.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
