Why Your Dryer Is Not Heating: A Quick Look at How It Works
The cause depends on the type of dryer, so start by knowing which one you have.
A dryer has two jobs. The drum turns, and warm air flows through it and out the vent. The motor handles the turning and the airflow. The heat comes from a heating element in an electric dryer, or from a gas burner in a gas dryer.
Because the motor and the heater are separate, the drum can turn perfectly while there is no heat at all. That is why a dryer that is not heating is a different problem from a dryer that will not start.
Safety parts sit in the heat path. High limit thermostats and thermal fuses cut the heat if the dryer gets too hot, usually because the airflow is restricted. They protect your home, which is why you never bypass them.
A clogged vent causes many heating faults and can start fires. If you have not cleaned yours recently, read our dryer vent guide before anything else.
Gas Dryer vs Electric Dryer: Why They Stop Heating
The same symptom has different causes depending on the fuel.
| Part or system | Electric dryer | Gas dryer |
|---|---|---|
| Source of heat | Heating element | Gas burner with igniter |
| Power needed | Two legs of 240 volt power | Standard outlet plus a gas supply |
| Common failure | Burned element, tripped breaker leg | Weak igniter, failed gas valve coils |
| Safety parts | Thermal fuse, high limit thermostat | Thermal fuse, flame sensor, high limit thermostat |
| Who should repair | Technician for most electrical tests | Technician for all gas related work |
Common Reasons a Dryer Tumbles but Does Not Heat
These cover both types, with notes where they differ.
Restricted vent or lint buildup
A vent packed with lint traps heat. The thermostat or fuse then shuts the heat off to protect the dryer.
Tripped breaker or power problem
An electric dryer needs two breaker legs. If one trips, the drum may turn on one leg while the heater gets none.
Burned out heating element
On electric dryers the element is a long coil. It can break or burn through over time, and then there is no heat.
Failed igniter or gas supply issue
On gas dryers, a weak igniter may glow but fail to open the gas valve. A closed shutoff valve has the same effect.
Blown thermal fuse
The fuse blows when the dryer overheats. It is an inexpensive part, but a blown fuse is a sign something caused the overheating.
Faulty thermostat or high limit
A bad thermostat can cut the heat too early or never turn it on.
Failed gas valve coils or flame sensor
On gas dryers, weak valve coils or a flame sensor that reads wrong can stop the burner staying lit.
Control or timer fault
A failed control or timer may not send power to the heater even when the drum runs.
How to Troubleshoot a Dryer That Is Not Heating: Six Safe Checks
Do these in order. They are all safe to do without opening the cabinet.
Check the load and the setting
A very large or very wet load can take much longer and seem like no heat. Check that the setting is on a heated cycle, not air only.
Check the breaker
For an electric dryer, look for a tripped double breaker. Switch it fully off, then on. If it trips again, stop and call.
Confirm the gas valve is open
On a gas dryer, check that the shutoff valve behind the dryer is in line with the pipe. If you smell gas at any point, leave the home and call your gas company or 911.
Clean the lint screen and the lint trap housing
Remove the screen and vacuum the trap opening. A clogged trap restricts airflow even before the vent.
Inspect the vent hose and outside flap
Pull the dryer out carefully and check the vent hose for crushing, kinks, and lint. Make sure the outside flap opens freely when the dryer runs.
Run a timed dry cycle and feel the air
Run a short heat cycle and feel the air at the vent outlet. If it is cool and the vent is clear, a part has likely failed.
Know your dryer first
- Is it gas or electric? Check the tag or the connection at the back.
- Note the model number from the door frame or back.
- Find the breaker panel and the gas shutoff.
- Have a vacuum with a long attachment ready.
Dryer Not Heating: Safe Home Checks vs Technician Work
Safe to try at home
- Resetting the breaker once
- Confirming the gas valve is open
- Cleaning the lint screen and trap
- Clearing the vent hose and outside flap
- Running a timed cycle to feel the air
Leave to a technician
- Testing the heating element or igniter
- Replacing the thermal fuse or thermostat
- Any gas line or valve work
- Bypassing a safety part for any reason
- Repeated breaker trips
What We Find on Repair Calls for a Dryer That Will Not Heat
We start with airflow. A restricted vent causes more heating faults than anything else, and replacing a part without fixing the vent just brings the fault back.
Next we check power or gas, then test the heating parts with a meter: the thermal fuse, the thermostats, and the element or the igniter and valve coils. Each test tells us whether a part has failed or not.
We explain what we found, give you the price, and replace only what failed. Where the vent caused the problem, we tell you how to prevent it.
Repair or Replace a Dryer That Is Not Heating
Most heating faults are repairs on a dryer that is otherwise sound. Elements, igniters, fuses, and thermostats are routine parts.
A dryer with a failed drum bearing, a cracked drum, or a long list of issues may be better replaced. Use our repair or replace guide to compare.
Dryer Not Heating? Call Now for Repair
If the vent is clear and the checks did not help, a technician can test the heating parts quickly.
Tell us whether it is gas or electric and what the dryer does.
Dryer Not Heating FAQs: Quick Answers Before You Call
Short answers to the questions we hear most. If yours is missing, call and ask.
Why is my dryer running but not heating?
A restricted vent, a tripped breaker leg on an electric dryer, a failed element or igniter, or a blown thermal fuse are the usual causes.
Why does my dryer take two cycles to dry?
Poor airflow from a clogged vent or lint trap is the most common reason. A weak heating element or a thermostat fault can also be the cause.
How do I know if my dryer is gas or electric?
A gas dryer has a gas pipe connection at the back and a standard plug. An electric dryer has a thick four or three prong cord and no gas line.
Is a blown thermal fuse something I can replace myself?
The part is small, but the fuse blows for a reason. If you replace it without finding the cause, it will blow again. A technician can find and fix the cause.
Can a clogged vent cause a dryer to stop heating?
Yes. Restricted airflow makes the dryer overheat, and the safety parts cut the heat. See our dryer vent guide.
Where can I read more about dryer repair?
See our dryer repair page for symptoms and the repairs we do.
