The short answer
A Hotpoint dryer that ends its cycle in minutes and one that runs for hours are the same problem seen from opposite ends: the machine cannot tell how wet the load is, or cannot remove the moisture it detects. Sensor bars coated with softener residue and a restricted airflow path account for most of both complaints.
Causes, ranked for this Hotpoint dryer
- Moisture sensor bars coated with residue — Why: Fabric-softener film insulates the metal bars in the drum so the control reads a wet load as dry and ends the cycle immediately, which is the classic short-cycle fault.
- Restricted lint path or exhaust duct — Why: Moist air that cannot leave keeps the load damp however long the machine runs, so a restriction produces the long-cycle complaint and the thermal cut-outs together.
- A setting rather than a fault — Why: Child lock, delay start and a low-heat or air-only option each change behaviour in ways that read as a cycle fault and cost nothing to eliminate.
- Door switch not confirming — Why: A machine that will not start at all is more often a door switch than a control, and it is checked by watching the drum light as the door closes.
- Control board or thermistor — Why: Last, because every cause above imitates it, and none of them requires a part or a technician to investigate first.
What to check, in order
- compare a timed cycle against an auto cycle. — Because: a timed cycle that works isolates the fault to the sensing path immediately.
- wipe the moisture sensor bars in the drum. — Because: it is the top cause of short cycles and takes a moment with a cloth.
- clean the lint screen and check the whole exhaust path. — Because: restricted airflow produces the long-cycle complaint and the cut-outs alike.
- check for child lock, delay start or an air-only option. — Because: settings explain a machine that will not start or will not heat for free.
Checks you can safely do yourself
- Run a short timed cycle and then an auto cycle on similar loads, noting which behaves correctly. — Tools: none — Time: an afternoon, mostly waiting
- Wipe the metal sensor bars inside the drum with a cloth and a little vinegar, then dry them. — Tools: a cloth and vinegar — Time: several minutes
- Remove the lint screen, wash it in warm soapy water to strip softener film, dry it, and vacuum the housing beneath. — Tools: a vacuum and warm soapy water — Time: several minutes
- Switch off at the breaker, pull the machine forward and check the duct for crushing, then clear it and the outside vent flap. — Tools: a vent brush and a torch — Time: the better part of an hour
- Check the manual for child lock, delay start and air-only settings and clear any that are set. Stop here: the thermistor and board need metering. — Tools: the owner manual — Time: several minutes
Before you open anything
Safety
unplug-before-service branch-circuit-15-20a
Lint is combustible and a machine that cuts out on temperature is reporting a restricted vent, which is the mechanism behind most dryer fires. Do not defeat a thermal cut-out or repeatedly restart a machine that has stopped hot. Kill power at the breaker before opening any panel or moving the machine.
Where the owner fix ends
Cleaning sensors, clearing the lint path and checking settings are owner work. Call a technician when auto cycles still end early with clean sensor bars, when the machine cuts out on temperature with a confirmed clear vent, and when it will not start with a door switch that is visibly working.
Nearest pages of the same kind
Generalized information — what this page does not cover
family model
This page is generalized information about Hotpoint dryers and covers vented, condenser and heat-pump models together, whose sensing, airflow paths and cycle behaviour differ. No family-level or model-level page exists in this reference yet; when one is published it will be linked here.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
