If your dryer runs but the clothes come out cold and damp, the problem is almost never the whole machine. In an electric dryer it is usually one of four things: a tripped breaker, a blocked vent, a burnt-out heating element, or a blown thermal fuse. In a gas dryer it is usually the igniter or the gas valve coils. All of them are repairable, and two of them you can check yourself in about ten minutes without opening anything.
Here is how to work out which one you are dealing with.
Start with the two things that are not a broken dryer
Both of these are free to check, and between them they account for a good share of the no-heat calls we go out to. Do these before you order a part.
Half the breaker has tripped
An electric dryer runs on 240 volts, which means it uses two breaker poles rather than one. The motor and the drum light run off one leg. The heating element runs off the other. If only one leg trips, you get a dryer that tumbles perfectly, lights up, and produces no heat at all, which is exactly why people assume the heating element has failed.
Go to the panel and find the dryer breaker. A half-tripped double breaker often does not look tripped. Push it firmly all the way to off, then back to on. If the dryer heats again, that was it. If it trips again within a cycle or two, stop and call an electrician rather than resetting it repeatedly. Something is drawing current it should not be.
This does not apply to gas dryers. A gas dryer runs on a standard 120-volt outlet, so if it is tumbling, it has all the power it needs.
The vent is blocked
This is the most common cause we see, and it is the one people are least likely to suspect because the dryer is not obviously broken.
When the exhaust cannot get out, heat builds up inside the cabinet instead of leaving with the moisture. The dryer’s safety devices notice, and they shut the heat down to stop the machine cooking itself. So you end up with a dryer that runs cold. Not because the heater failed, but because the dryer decided it was not safe to heat.
Signs of a blocked vent are worth knowing, because they show up before the no-heat stage:
- Clothes take two or three cycles to dry when they used to take one.
- The outside of the dryer, or the laundry room itself, is noticeably hot after a cycle.
- Very little air comes out of the exterior vent hood while the dryer is running.
- There is a hot, slightly scorched smell during the cycle.
Pull the dryer out, disconnect the duct, and look. Check the flexible hose behind the machine for kinks and crushing. A dryer pushed too far back against the wall will flatten its own duct. Then check the exterior hood, which is where the lint actually collects, and where birds nest in spring. Clear the whole run, not just the ends.
If the dryer heats normally once the duct is off and the machine is exhausting into the room, you have found your problem. Do not leave it running that way, because it is a fire and moisture risk, but it is a useful two-minute diagnostic.
What actually fails, in order of how often we see it
If the breaker is fine and the vent is clear, you are into parts. These are listed roughly in order of frequency.
The heating element
In an electric dryer, the heating element is a coil of wire in a housing that glows when current runs through it. It has a finite life. Most give out somewhere around eight to twelve years of normal use, and much sooner in a house that dries several loads a day. When the coil breaks, the circuit opens and the element simply stops producing heat while everything else carries on working.
This is the classic pattern for an electric dryer that will not heat: perfect tumbling, normal timer, cold air. Testing it means checking continuity across the element terminals with a multimeter. No continuity means the element is done.
One thing worth understanding: a heating element that fails on its own is normal wear. A heating element that fails within a year or two of the last one is telling you the vent is restricted and the element is running hotter than it was designed to. Replacing the part without fixing the airflow just buys you another element failure.
The thermal fuse
The thermal fuse is a small, cheap, one-time safety device. If the dryer gets hotter than it should, the fuse blows and cuts the heating circuit permanently. It cannot be reset. It has to be replaced.
On most models a blown thermal fuse kills the heat but leaves the drum turning. On some, it stops the dryer entirely. Either way, the important point is that a thermal fuse does not blow for no reason. It blows because the dryer overheated, and the dryer overheated because the air could not get out. If someone replaces the fuse without clearing the vent, the new one blows too, usually within a few weeks.
This is the single most common repeat call in dryer work, and it is entirely avoidable.
The cycling thermostat and the thermal cut-off
These two sit alongside the fuse and do a similar job at different thresholds. The cycling thermostat switches the element on and off to hold the drum at the right temperature. The thermal cut-off is a second-line safety device that opens if the cycling thermostat fails to do that.
A failed cycling thermostat can produce no heat, or it can produce a dryer that heats briefly and then goes cold for the rest of the cycle. A tripped thermal cut-off produces no heat at all. Both are inexpensive parts, and both are usually replaced together with the fuse as a set, because they sit in the same airflow path and have been through the same heat.
Gas dryers: the igniter and the valve coils
Gas dryers fail differently, and the symptom tells you which part to look at.
If the igniter glows and then fades without the burner lighting, the gas valve coils are the likely culprit. The coils open the valve to release gas, and when they weaken they stop opening reliably, often intermittently at first, so the dryer heats on some cycles and not others.
If the igniter never glows at all, either the igniter itself has failed or the thermal fuse in the gas circuit has opened. Igniters are brittle and fail fairly regularly.
Gas dryer work involves a live gas connection. Checking the vent is fine. Beyond that, this is a job for someone qualified.
The timer or control board
Least common, and worth mentioning mainly so you do not jump to it. A failed timer or control board can stop sending power to the heating circuit, and the symptom looks identical to a failed element. It is diagnosed by elimination: everything else tests good, and the element is not receiving voltage. Boards are the most expensive part on this list, which is exactly why you rule out the cheap causes first.
Should you replace the heating element yourself?
Honestly, it depends on the machine and on you.
Replacing a heating element is mechanically simple. On many models it is a back panel, a few screws, two wires and a bracket. Parts are widely available and not expensive. If you are comfortable working inside an appliance, have unplugged it at the wall, and have a multimeter to confirm the element is actually the failed part, it is a reasonable job to take on.
The things that catch people out are these. First, some models require pulling the drum to reach the element housing, which turns a thirty-minute job into a two-hour one with belt routing you have to get right. Second, if you replace the element without testing, roughly half the time you have bought a part you did not need, because the fuse, thermostat or cut-off was the real fault. Third, and most important, if you do not fix the airflow that killed the first element, you will be doing this again.
If you are dealing with a gas dryer, or a stacked laundry unit, or the diagnosis is not clear, that is the point to hand it over.
What this typically costs
The parts on this list are inexpensive; the labor is what varies. A thermal fuse, cycling thermostat or thermal cut-off is a small part and a straightforward replacement. A heating element sits a little higher, mostly because of the access work on some models. A control board is the outlier and is the one repair where a repair-or-replace conversation genuinely applies, particularly on a dryer past ten years old.
A vent clean is separate work and is often the cheapest thing on the invoice while being the thing that stops you calling again.
Our diagnostic fee is $79, and we waive it when you approve the repair, so if the fix is a blown fuse, you are paying for the fuse and the visit, not for the visit twice. Every repair carries a 90-day parts and labor warranty.
When to stop and call someone
Check the breaker. Check the vent. If neither of those is it, and you are not set up to test components with a meter, that is a sensible place to stop.
Call sooner rather than later if any of the following apply:
- You smell burning, or gas, at any point.
- The breaker trips again after you reset it.
- You have already replaced a part and the problem came back.
- It is a gas dryer and the vent is clear.
- The dryer is getting very hot but not drying, which is an overheating pattern rather than a no-heat one.
That last one matters. A dryer that is running hot and not drying is closer to a fire risk than a dryer that has gone cold, because the cold one has already shut its own heat off as a precaution. Do not keep running it.
Common questions
Why is my dryer not getting hot but still running?
Because the tumbling and the heating are on separate circuits. The motor can have power while the heating circuit does not, from a half-tripped breaker, a blown thermal fuse, or a failed heating element. A dryer that turns but stays cold is normal behaviour for all three of those faults.
Can a blocked dryer vent stop the dryer heating?
Yes, and it is the most common cause. When exhaust cannot escape, the dryer overheats and its safety devices cut the heat. The dryer is not broken. It is protecting itself. Clearing the vent often restores heat with no parts at all.
How long does a dryer heating element last?
Usually eight to twelve years with normal household use. It goes sooner in homes running several loads a day, and much sooner if the vent has been restricted, because a starved element runs hotter than it was designed to.
Why did my dryer stop heating right after I replaced the thermal fuse?
Because the fuse was the symptom, not the cause. Thermal fuses blow in response to overheating, and the overheating is almost always restricted airflow. Until the vent run is cleared end to end, each new fuse will blow the same way.
Is it worth repairing a dryer that will not heat?
For most no-heat faults, yes. Elements, fuses and thermostats are inexpensive parts, and a dryer under about ten years old is generally worth fixing. The exception is a failed control board on an older machine, where the repair cost starts to approach the value of the dryer.
My gas dryer will not heat but the drum turns. What is it?
Most often the igniter or the gas valve coils. If the igniter glows and then fades without lighting, suspect the coils. If it never glows, suspect the igniter or the thermal fuse. Gas work should be left to a qualified technician.
Getting it fixed
If you have checked the breaker and cleared the vent and your dryer still will not heat, we can diagnose it properly rather than guessing at parts. AGA Appliance Service has been repairing dryers across the Charlotte area since 2022, covering 29 cities across seven counties in North Carolina and northern South Carolina. We are open 9 AM to 8 PM, seven days a week, and if you book before 11 AM we can usually get to you the same day.