2. Quick Answer
Quick answer: If a dryer runs but does not heat, confirm a heated cycle, clean the lint screen, reduce the load, and check outdoor airflow first. An electric dryer can tumble after losing part of its supply. Heater, ignition, wiring, and safety-device diagnosis requires a qualified technician.
3. Before You Start
| Item | What to prepare |
|---|---|
| Tools | Owner's manual, flashlight, phone for photos, soft brush, and vacuum for accessible lint only |
| Time | 15–45 minutes for external checks |
| Difficulty | Moderate; internal work is professional-only |
| Safety | Disconnect power before touching the plug-accessible duct or cleaning beyond the lint screen |
Key takeaway: Tools: what to prepare — Owner's manual, flashlight, phone for photos, soft brush, and vacuum for accessible lint only.
Do not perform live mains testing. Unplug an electric dryer or switch off and lock out its dedicated breaker before access; have a qualified person confirm de-energization. Gas-valve, burner, regulator, and supply-line work belongs to a licensed gas professional. Never bypass a door switch, thermal fuse, thermostat, interlock, breaker, or grounding connection. Sealed refrigeration work and internal TV capacitor repairs are also outside this guide's DIY boundary. Stop using the appliance for a burning smell, smoke, scorching, repeated breaker trips, or water near electricity.
If gas odor is present, do not operate switches, unplug equipment, use a phone in the area, or search for the leak. Leave the building and contact the gas utility or emergency services from a safe location. For smoke or fire, evacuate and call 911. Check CPSC recalls using the exact model.
4. Causes Ranked by Likelihood
| Cause | How to check | Fix | Difficulty |
|---|---|---|---|
| No-heat cycle or control setting | Compare Timed Dry on a normal heat setting with Air Dry; read the display | Select a fabric-appropriate heated cycle | Easy |
| Restricted lint screen or exhaust | Clean the screen and observe the exterior flap during a supervised cycle | Clear accessible lint; arrange full duct cleaning if flow stays weak | Easy–Moderate |
| Partial electrical supply loss | Note whether the drum turns but heat is absent; do not probe the outlet | Have an electrician check the circuit, breaker, receptacle, and cord | Pro only |
| Overtemperature protection opened | Heat stopped after slow airflow or overheating | Technician corrects airflow cause and tests protections | Pro only |
| Failed electric heating system | Airflow and settings are normal but electric heat never appears | Technician tests element, relays, wiring, and temperature controls | Pro only |
| Gas ignition or burner fault | Gas model tumbles but never produces normal heat | Licensed gas-qualified service tests ignition and gas train | Pro only |
Key takeaway: No-heat cycle or control setting: how to check — Compare Timed Dry on a normal heat setting with Air Dry; read the display.
The order is a practical starting sequence, not a statistical diagnosis. Installation, fuel, dryer design, age, and recent changes shift the likelihood. Do not buy a part until the symptom and model-specific procedure support it.
5. Detailed Numbered Fixes
1. Confirm the Cycle and Controls
Dryers commonly offer Air Dry, Air Fluff, Wrinkle Release, and delicate programs that use little or no heat. Cancel the cycle, wait for the controls to settle, and choose a clearly heated timed cycle exactly as the manual describes. Use a few washer-damp cotton towels so the test has a realistic thermal load. An empty-drum test can feel misleading because sensors and heat cycling behave differently without wet fabric.
Check Control Lock, Eco, low-temperature, and dryness selections. A low setting may produce air that feels only mildly warm, especially near the beginning of the cycle. Do not judge heat by touching metal inside the drum; surfaces can burn. If controls ignore selections, photograph the display and stop rather than entering an undocumented service mode.
2. Restore Unrestricted Airflow
A dryer can intentionally interrupt heat when temperatures rise because moist air cannot escape. Remove lint from the screen by hand. If the manual permits washing the removable screen, use mild soap and water, rinse it, and dry it completely. Inspect the transition duct only after disconnecting power; do not pull a gas dryer or strain its connector.
During a supervised cycle, observe whether the exterior hood opens and releases a steady stream. Weak flow, lint around joints, or a flap that barely moves calls for vent service. Cleaning only the first few inches does not clear a long concealed run. Do not bypass a thermal device to force heating; it is responding to a potentially dangerous condition.
3. Treat the Electric Supply as a Professional Check
Many full-size electric dryers use two supply legs. The motor and display may operate while the heating circuit lacks the required supply. Resetting a breaker may be allowed by the panel labeling and owner manual, but repeated tripping is a stop-use condition, not a reset routine. Never remove a receptacle cover, open a panel, or measure live voltage.
Discoloration, melting, buzzing, or unusual warmth at a plug or receptacle needs an electrician. Disconnect only if that can be done safely without touching damaged material. A technician can separate a house-circuit problem from an appliance fault with rated instruments and safe procedures.
4. Do Not Replace a Thermal Device Without the Cause
A thermal fuse or cutoff can open after overheating, but the opened device is evidence rather than a complete diagnosis. Restriction, a stalled blower, a shorted heater, incorrect ducting, or failed temperature control may be upstream. Replacing the protective part while leaving the cause can produce another failure or fire hazard.
Cabinet access also exposes sharp edges and mains wiring. A qualified appliance technician should inspect the whole air path, verify temperatures against service information, and use the exact approved part. Never bridge a cutoff even briefly.
5. Have the Electric Heating Circuit Diagnosed
An electric heating element can crack, open, or contact its housing. Relays, thermostats, connectors, and wiring can also fail. Similar symptoms do not identify which component is responsible. Resistance readings taken on an isolated component may be part of professional diagnosis, but live testing and casual parts swapping are outside this guide.
Provide the technician with cycle observations and whether drying had gradually slowed first. That history helps reveal an airflow problem behind the electrical failure. Ask that scorched connectors and the vent system be assessed, not just the element.
6. Escalate Every Gas-Heat Fault
A gas dryer uses an igniter, flame sensor, valves, burner, and combustion exhaust. Failure at several points can cause no heat or intermittent heat. Do not watch ignition with covers removed, adjust an air shutter, loosen a gas fitting, or test valves yourself.
If gas odor is present, do not operate switches or create a spark. Leave the area, then contact the gas utility or emergency service from a safe place. Without odor, arrange a licensed gas-qualified technician who can follow the exact model procedure and check safe combustion and venting.
6. Brand-Specific Notes
Brand interfaces use different names for no-heat options and airflow alerts. Samsung and LG may provide model-specific display guidance online or in an app; Whirlpool, Maytag, GE Appliances, and Electrolux organize manuals by full model number. Do not transfer a diagnostic code or reset sequence from another model. Codes, procedures, clearances, and parts vary by model, so confirm everything in the owner's manual or on the manufacturer's support site before acting. Use the complete model number from the door opening or rear label. Official starting points include Whirlpool Support, GE Appliances Support, LG Support, Samsung Support, Maytag Support, and Electrolux Support.
Manufacturer verification note: codes, procedures, parts, duct limits, and reset steps vary by model. Confirm all instructions in the owner's manual or official manufacturer support site. A message that resembles another model's code is not enough evidence to replace a part.
7. When to Call a Professional
Call a qualified appliance technician when safe external checks do not resolve the symptom, when cabinet access would be necessary, or when the dryer has damaged wiring, a persistent mechanical noise, overheating, or an unexplained protection trip. Call a licensed electrician for a hot or damaged receptacle, circuit concerns, or repeated breaker trips. Gas valves, burners, regulators, connectors, and supply piping require a licensed gas professional. Heat-pump sealed refrigeration work is also professional-only.
Ask the provider whether diagnosis, labor, parts, travel, and repair warranty are included in a written quote. Compare the diagnosis with a suitable replacement before authorizing major work.
Stop use immediately for a burning smell, smoke, glowing, scorching, repeated breaker trips, water near electricity, gas odor, or a drum that binds. Never bypass a thermal fuse, door switch, thermostat, interlock, grounding connection, or breaker. Do not perform live mains testing.
NFPA provides dryer fire-prevention guidance at NFPA. If a laundry outage also affects refrigerated food, FDA guidance says an unopened refrigerator generally keeps food cold about 4 hours and a full unopened freezer about 48 hours, or 24 hours if half full; see FDA outage food safety.
8. Prevention Tips
Clean the lint screen every load, avoid packing the drum, and have the full duct cleaned at least yearly or sooner when flow declines. Keep the transition duct short and uncrushed. Sort heavy and light fabrics so a sensor cycle is not fooled by already-dry items. Address longer cycle times before protective devices begin opening.
- Keep the area around the dryer free of lint, paper, and stored combustibles.
- Supervise operation; do not run the dryer while asleep or away from home.
- Follow textile care labels, especially for oil-contaminated, foam, rubber-backed, or solvent-exposed items.
- Record changes in cycle time, sound, odor, and outdoor airflow before a failure becomes severe.
- Use only model-correct parts and approved installation materials.
9. Frequently Asked Questions
The page displays the reviewed FAQ questions and answers from frontmatter, so the guidance is not duplicated here.