The short answer
A dryer that tumbles without heat has almost always protected itself rather than broken: a restricted duct overheats the machine and a one-shot fuse opens to save it. Replacing that fuse without clearing the duct simply opens the next one. The drum turning normally tells you the motor, the belt and the door switch are all fine, so the fault is in the heat circuit or the protection that guards it. On a Summit dryer the cause that ranks first is duct restricted, which has tripped the thermal fuse.
What you observe
- Clothes come out damp after a full cycle, again and again — Either no heat at all, or heat that is being cut short by a protector.
- Heat at the start of the cycle that fades away part-way through — A protector that opens on temperature and resets as it cools.
- NEAR MISS — the machine heats but the cycle never ends — That is a cycle fault, and it points at sensing rather than the heater.
Causes, most likely first on a Summit dryer
- Duct restricted, which has tripped the thermal fuse — Lint packs the duct, heat cannot escape, and a one-shot thermal fuse opens the heat circuit permanently while leaving the motor running. It ranks first on a Summit dryer because there is very little slack behind the panels of a compact cabinet, so anything that restricts restricts completely.
- Heating element open — The element coil breaks, usually after a period of running hot behind a restricted duct, and the machine tumbles cold from then on. Second on this platform: it is the part the restriction above eventually destroys, which is why it sits directly beneath it.
- Hi-limit thermostat open — A second protector on the heater housing opens when the machine overheats, and unlike the fuse it can reset itself, giving intermittent heat. Ranked here because intermittent heat rather than no heat at all points here before it points at the element.
- Only one leg of the supply present — An electric dryer takes two live legs: the motor runs on one, the element needs both, so losing a leg gives a machine that tumbles without heating. Last, and the reason to work down the list rather than guess: it explains a perfectly healthy machine with no heat and it is upstream of the appliance entirely.
Check in this order, and why
- Disconnect the duct and feel the airflow at the back of the machine — Strong flow at the machine and weak flow at the wall is a duct, not a dryer.
- Confirm that the drum turns normally and the air stays cold throughout — A cold cycle with normal tumbling narrows it to the heat circuit.
- Note whether there is heat at the start of a cycle that fades later — Heat that disappears part-way is a resetting protector.
What an owner can safely check
- Pull the machine out, disconnect the duct and clear it end to end — A leaf blower or a duct brush does in ten minutes what a vacuum does badly.
Tools: duct brush, vacuum, screwdriverAbout 40 min
- Switch the breaker fully off and back on, making sure both poles move together — If it will not reset, stop — that is an electrician's job.
Tools: torchAbout 10 min
- STOP HERE if the next step needs a meter on live terminals or a panel off — That is where an owner check ends and a service call begins, whatever the ranking above says.
Before you open anything
Safety
Unplug the dryer or switch off its breaker before removing any panel; on a gas machine, shut the appliance gas valve too. If you smell gas, do not switch anything on or off — leave the building and call the gas utility or your local emergency number from outside.
When to call a technician
Call once airflow and the supply are both ruled out, and call immediately if there is a scorching smell or the back of the machine is too hot to touch. On a compact machine, expect access to be the larger half of any labour quote — the part itself is rarely the expensive part.
Nearest pages of this class
What this page does not cover
This page is written for the Summit dryer as a class, not for one family or model line. Where a family- or model-specific page exists for your unit it is linked above, it is the more specific answer, and it is the one to read first. Deliberately not here: part numbers, wiring colours, panel removal order and torque figures, all of which differ between families under the same nameplate.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
