Dryer Won’t Heat | Fix It Fast

You press start, the drum spins, but clothes stay damp. That points to heat loss. The good news: most causes sit in a list you can check using tools you may already own. Below you’ll find fast checks, deeper tests, and care tips that bring heat back.

Dryer Not Heating: Fast Checks

Start with simple items that fix many cases. Power supply, settings, and airflow all affect heat. Do these before opening the cabinet.

Symptom	Most Likely Causes	Quick What To Do
Drum spins, no warmth	Tripped thermal fuse; failed heating element or gas igniter	Check breakers, then test fuse and heat source
Heats, then stops mid-cycle	Blocked vent; cycling thermostat reacting to high temp	Clean lint screen and vent run end-to-end
Gas model, no flame	Igniter or flame sensor; gas valve coils	Watch through view port for glow or flame
Long dry times, some heat	Crushed duct; roof cap stuck; heavy lint	Vacuum duct, verify strong air at outside hood
Stops and won’t restart hot	Motor overheating from poor airflow	Let cool, clear vent, try smaller loads

Confirm Power And Settings First

Electric models need two hot legs at the outlet. A half-tripped breaker lets the drum run but removes heat. Flip both dryer breakers off, then back on. On the console, make sure you’re not on Air Fluff or a low temp cycle by mistake.

Clear Airflow From Lint Screen To Outside

Airflow drives drying. Pull the lint screen and clean it. If it looks coated, wash with warm water and a drop of dish soap, then dry. Unplug the dryer, slide it out, remove the duct, and vacuum the back panel. Go outside and check the hood: the flap should swing freely and push strong air with a running cycle. A packed run can trip the overheat fuse.

For safety, keep the vent run short, use smooth metal, and avoid screws that snag fibers. Lint build-up raises fire risk; the CPSC’s dryer safety alert warns that blocked ducts trap heat and can ignite fibers.

Know Your Heat Source: Electric vs Gas

Electric dryers make heat with a coil assembly. Gas units light a burner using an igniter and flame sensor, controlled by gas valve coils. Both types monitor drum temperature with a cycling thermostat and a high-limit cutoff. A one-time thermal fuse opens if temperatures spike; once blown, it must be replaced and the root cause fixed. See Whirlpool’s concise no-heat guide for model tips.

Step-By-Step: Electric Dryer No Heat

1) Test The Thermal Fuse

Unplug the dryer. Remove the rear panel. Find the small fuse on the blower housing or near the element shroud. Pull one wire and check continuity with a multimeter. No continuity means it’s open and needs replacing. A blown fuse often points to a clogged vent path or a stuck high-limit. Fix airflow before installing the new part.

2) Check The Heating Element

With power still off, disconnect the element leads. Measure resistance across the element terminals. Typical values land in the 8–12 ohm range on many models. Infinite resistance means the coil is broken. Inspect the coil for breaks or touches to the case that cause short cycles.

3) Inspect High-Limit And Cycling Thermostats

These round thermostats sit on the heater duct. At room temperature they should show continuity. Warmth switches the cycling thermostat open; the high-limit stays closed until unsafe heat. If either reads open at room temp, replace it.

4) Confirm The Timer Or Control Relays

If the fuse and element pass, listen for a relay click when heat should start. On mechanical timers, move through cycles that call for high heat. No relay action or no voltage at the element points to the timer or main board. Board faults are rarer than blown fuses or failed elements, so rule those out first.

Step-By-Step: Gas Dryer No Heat

1) Watch The Igniter

Remove the lower panel. Start a cycle and watch the burner area. The igniter should glow bright in under a minute, then you should hear a click and see flame. If it never glows, test the igniter for continuity. If it glows then shuts off with no flame, move to the sensor and valve coils.

2) Test The Flame Sensor

With power off, remove one lead from the sensor on the burner tube and check continuity at room temp. It should read closed. If it reads open, replace it. If it reads closed but the burner still won’t light after the igniter glows, suspect weak valve coils.

3) Check Gas Valve Coils

Coils can fail warm. The dryer may light once, then lose heat on later cycles. If you see ignition only on the first try, install a coil kit matched to your model. It’s a low-cost fix compared to repeat service calls.

4) Verify The Thermal Fuse

Gas units also use a one-shot fuse. Find it on the blower housing. An open reading points to an overheat event, often from a clogged vent or a stuck high-limit.

When To Call A Pro

If you smell gas, stop and call a licensed tech. If your breaker trips as soon as heat starts, you may have a shorted element touching the can or a wiring fault. Control board diagnosis needs safe meter skills; if that’s outside your comfort zone, book service. Clogged ducts are the root cause behind many repeat part failures, so a visit should include a full vent cleaning.

Parts And Tests At A Glance

Use this condensed guide when you’re in the laundry room with a meter in hand.

Part/Test	Pass/Fail Clues	Notes
Thermal fuse	Should read closed at room temp; open means blown	Replace and fix airflow
Heating element	Reads finite ohms; infinite means broken coil	Check for coil touching frame
Igniter (gas)	Glows bright; continuity good cold	No glow points to bad igniter or power path
Flame sensor (gas)	Closed at room temp; opens when hot	Open cold means bad sensor
Valve coils (gas)	Lights once then quits warm	Swap as a pair
Cycling thermostat	Closed cold; opens as temp rises	Erratic swings hint at failure
High-limit thermostat	Closed cold; opens only near cutoff	Frequent trips point to blocked vent

Safety Notes And Fire Prevention

Unplug before opening panels. For gas, close the supply valve. Wear cut-resistant gloves; edges inside the cabinet can be sharp. Keep the area around the dryer free of dust and lint piles. Never run loads while away or asleep. Clean the vent run at least yearly, or sooner for large households, pets, or long duct runs. Lint is fuel; airflow and routine cleaning keep temperatures in check.

Care That Keeps Heat Steady

Keep The Vent Short And Smooth

Use rigid or semi-rigid metal only. Skip foil slinkies. Limit bends to gentle sweeps. Replace crushed lines, and route the run with the fewest turns. A short, smooth path cuts dry time and protects parts.

Clean The Lint Screen And Housing

Pull the screen every load. Wash the mesh monthly if you use dryer sheets; residue coats the mesh and chokes flow. A slim lint brush helps reach into the housing below the screen where fibers collect.

Right-Size Loads And Mixed Fabrics

Overstuffed drums block tumbling and trap moisture. Mix heavy towels only with other heavy items. Small loads waste heat; aim for the middle.

Use Sensor Dry Wisely

Sensor bars read moisture on sliding fabric. If loads feel dry but cycles keep running, wipe the bars with alcohol to remove film. If cycles end too soon, switch to timed dry while you track down airflow or sensor residue.

Model-Specific Tips

Layouts differ, but failures rhyme. Whirlpool rear-heater models often lose heat to a broken coil or a tripped fuse on the blower. Many Samsung front-heater units place the element in a can under the drum; access starts at the front. GE gas units have a burner assembly with a simple view port to watch ignition. Always match parts by full model number off the door sticker.

Five-Step Troubleshooting Flow

1) Verify Power And Settings

Check the double breaker, confirm a heat cycle, and turn off Eco modes.

2) Restore Airflow End-To-End

Clean screen, housing, duct, and outside hood; confirm strong exhaust.

3) Test One-Shot Safeties

Meter the thermal fuse and replace if open, then fix the cause.

4) Test The Heat Source

Electric: measure the element. Gas: watch the glow, sensor, and coil hand-off to flame.

5) Check Thermostats And Controls

Confirm cycling action and listen for relay clicks; test output to the heater.

What To Buy First

Before you shop, measure and clean. Many “no heat” calls trace to airflow alone. If parts are needed, a fuse kit, valve coils for gas, or an element assembly fix a wide slice of cases. Keep spare clips and screws handy; they vanish under the washer faster than you’d think.

When Replacement Beats Repair

Ten-plus years old and piles of parts in? Price a new unit. If the drum, motor, and controls are still steady but the cabinet is rusted or the vent can’t be corrected, replacing the appliance may save time and power over the long run. Keep the vent work, outlet, and gas line ready so a new dryer can slide in quickly.