The most important thing to understand when your dryer stops producing heat is this: gas dryer not heating vs electric dryer not heating are almost entirely different problems. The failure points are different, the diagnostic steps are different, and replacing the wrong part based on generic advice is how people waste money. Before you order anything, you need to know which system failed and why.
This article routes you by dryer type first, then walks through the most likely causes for each — ranked by how often they actually fail. If your dryer stopped working suddenly and you need a full step-by-step multimeter sequence, see our guide on dryer suddenly stopped producing heat — this article focuses on the diagnostic framework by dryer type, including gradual and intermittent failures, rather than duplicating that procedure.
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Why Gas and Electric Dryers Stop Heating for Different Reasons
Electric dryers generate heat from one or two heating elements — metal coils that get hot when 240V of electrical current runs through them. Gas dryers use a burner assembly: a gas valve opens, an igniter glows hot enough to light the gas, and a flame sensor (also called a radiant sensor) confirms ignition and tells the valve to stay open.
These are fundamentally different heat systems. That means most of the failure points in a gas dryer not heating vs electric dryer not heating situation don’t overlap — except for a shared set of thermal protection devices and airflow components covered later.
Before going further, confirm your dryer type:
- Electric: 3- or 4-prong cord plugged into a dedicated 240V outlet (larger than a standard wall outlet)
- Gas: Standard 120V plug (like a normal appliance) plus a gas supply line connected at the back
Note that gas dryers still require 120V electricity to run the drum, controls, and igniter. A gas dryer that won’t start at all may have an electrical issue, not a gas issue.
When your gas dryer is not heating, the failure almost always traces back to one of four components in the burner assembly. Work through these in order before touching anything else.
1. Igniter Failure (Most Common)
In older gas dryers — anything past five or six years of regular use — the igniter is the first thing to suspect when you get no heat at all.
What you’ll see: The drum spins normally, the cycle runs, but there’s no heat and clothes come out damp.
How to check: Open the burner access panel (usually at the lower front of the dryer). Start a cycle and watch. The igniter should glow bright orange within the first minute. If it never glows, the igniter has failed. If it glows but the burner never lights, the problem is likely the gas valve coils or flame sensor — not the igniter itself.
Safety first: Before removing any panel, turn off the gas supply valve behind the dryer and unplug the unit.
2. Gas Valve Coils (Solenoids)
The gas valve has two or more electromagnetic coils (solenoids) that open the valve to allow gas flow. One coil can fail while the others still function — which is why this is one of the most misdiagnosed failures in gas dryers.
What you’ll see: The igniter glows fully — reaches full brightness — then goes out. The burner never lights. The cycle repeats this pattern without ever producing a flame.
This is the key distinction from a dead igniter: if the igniter glows but the burner doesn’t light, look at the coils first.
How to check: Use a multimeter set to continuity or resistance mode. Disconnect each coil and probe the terminals. A failed coil will show no continuity. Replace all coils at once — if one has failed, the others are typically near the end of their life too.
3. Flame Sensor (Radiant Sensor)
The flame sensor monitors the burner and signals the gas valve to stay open once ignition is confirmed. When it fails, the valve shuts down even after a successful light.
What you’ll see: The burner lights briefly — sometimes just a second or two — then shuts off. The dryer may produce a small amount of warmth but not nearly enough to dry a load.
How to check: Multimeter continuity test. A working flame sensor shows continuity when cold and opens (no continuity) when hot. If it shows no continuity when cold, it’s failed.
4. Gas Supply Issue
Before assuming any component has failed, spend 30 seconds on this check. It’s obvious once you know to do it, but easy to skip.
Check that the shutoff valve behind the dryer is fully open — the handle should be parallel to the gas line, not perpendicular.
Then check another gas appliance in the house: stove burner, water heater pilot. If those aren’t working either, the problem is supply-side. Stop diagnosing the dryer and call your gas utility.
⚠️ Safety note: If you smell gas at any point — before, during, or after diagnosis — do not continue. Do not flip any switches. Leave the home immediately and call your gas utility or 911 from outside.
Electric Dryer Not Heating: Where to Start and What Usually Fails
When your electric dryer is not heating, the cause is almost always electrical — either a safety device that has tripped, a failed heating component, or a power supply problem. Start with the most common causes first.
1. Blown Thermal Fuse (Most Common)
The thermal fuse is a single-use safety device designed to blow permanently if the dryer overheats. It cannot be reset — once it’s gone, it needs to be replaced.
What you’ll see: The dryer runs but produces no heat. In some models, depending on where the fuse sits in the circuit, a blown thermal fuse will stop the dryer from starting at all.
How to check: Multimeter continuity test across the fuse terminals. No continuity means it’s blown. For a full walkthrough of the thermal fuse diagnosis and replacement process, the dryer suddenly stopped producing heat guide covers the step-by-step procedure in detail.
Critical point: Do not replace the fuse without finding out why it blew. A blocked exhaust vent or failing heating element caused the overtemperature condition. Replace the fuse without fixing the root cause and it will blow again, often within a cycle or two.
2. Heating Element Failure
The heating element is a coiled resistive wire that generates heat. It can fail partially — a break in the coil that doesn’t short — or completely.
What you’ll see: No heat, even after the thermal fuse tests fine. Sometimes a faint burning smell during the cycle when the element first breaks.
How to check: Multimeter continuity across the element terminals. No continuity means the coil is broken and the element needs replacement. For a detailed procedure on using a multimeter to test this component, see our guide on How to Test a Dryer Heating Element with a Multimeter.
3. Cycling Thermostat Failure
The cycling thermostat regulates temperature throughout the drying cycle, switching the heating element on and off to maintain the target temperature. A failed cycling thermostat can cut heat entirely or cause erratic heating.
What you’ll see: Dryer heats inconsistently — sometimes warm, sometimes not. Or heat cuts out partway through a cycle.
How to check: Multimeter continuity at room temperature. A working cycling thermostat shows continuity when cold. No continuity at room temperature = failed thermostat.
4. Lost Second Leg of 240V Power
This one trips up a lot of homeowners dealing with an electric dryer not heating. Electric dryers run on two 120V legs combined to make 240V. The drum motor and controls run on one leg. The heating element runs on the other. If one leg fails — due to a partially tripped breaker or a loose connection at the outlet — the dryer appears to run normally but produces zero heat.
What you’ll see: Drum spins, timer advances, controls respond — everything seems fine except there’s no heat.
How to check: Go to your electrical panel and reset the dryer’s breaker completely: flip it fully off, then back on. Do not just push it further toward “on” if it looks like it’s still on — a tripped breaker often sits in a middle position that looks engaged but isn’t.
If the breaker trips again immediately, stop. That’s a wiring or outlet problem, not a dryer problem. Call an electrician.
A non-contact voltage tester is the right tool here — you can confirm whether power is present at both sides of the outlet before assuming the dryer itself has failed. It’s a fast, safe check that takes 30 seconds.
Shared Causes: Checks That Apply to Both Gas and Electric Dryer Not Heating Problems
Whether you’re dealing with a gas dryer not heating or an electric dryer not heating, several failure points are common to both. Don’t skip these just because you’ve already checked the type-specific components.
Thermal Cutoff Fuse
Some dryer models include a thermal cutoff fuse in addition to the standard thermal fuse. This is a separate, permanent shutoff device. It’s easy to miss because technicians and DIYers often replace the thermal fuse, confirm continuity, and assume the thermal protection system is fine — without checking whether a second cutoff device also tripped.
How to check: Multimeter continuity. Location varies by model — check your service manual or tech sheet (usually taped inside the back panel).
Vent Blockage
A clogged or kinked exhaust vent is the single most common reason thermal protection devices trip in the first place. Restricted airflow causes heat to back up inside the drum, temperatures spike, and the fuse blows as designed.
If your dryer stops heating and you find a blown thermal fuse, clear the vent before replacing anything. If you don’t, the replacement fuse will blow again.
Signs of a blockage: clothes take multiple cycles to dry fully, the dryer cabinet feels unusually hot to the touch, or there’s very little airflow at the exterior vent cap. If your clothes routinely need more than one cycle to dry, that’s often a sign of restricted airflow developing before a full heat failure occurs. [LINK PENDING: how to clean a dryer exhaust vent] and [LINK PENDING: dryer takes multiple cycles to dry] cover both the cleaning process and partial-heat symptoms in detail.
Door Switch Failure
A faulty door switch can prevent heat in some models even when the drum continues to spin. This is because certain designs cut the heating circuit — not the motor circuit — when the door switch signal fails.
How to check: With the dryer unplugged, press the door switch plunger manually and test continuity. It should show continuity when pressed and open when released. If the result is reversed or there’s no continuity either way, replace it.
Control Board Failure
A failed control board is a legitimate cause of no heat, but it’s rare and should be the last thing you check — not the first. Diagnose every component in the failure chain before considering the board. Control boards are expensive, and misdiagnosing one is a costly mistake.
What Not to Do
- Don’t replace the thermal fuse without testing the vent. The fuse is a symptom. The vent is usually the cause.
- Don’t assume the cheapest part is the problem because it’s easy to replace. Test first, then buy.
- Don’t test for gas leaks with an open flame. Ever. Use soapy water on connections or a gas leak detector.
- Don’t order parts based on dryer model number alone. Confirm failure with a continuity test first — two identical model numbers can have different component configurations.
How to Confirm Which Component Has Failed Before You Buy a Part
Whether you’re diagnosing a gas dryer not heating or an electric dryer not heating, the multimeter continuity test is the core diagnostic skill. Here’s the short version for readers who haven’t used one:
- Set the multimeter to continuity mode (the symbol that looks like a sound wave) or resistance (Ω).
- Touch the two probes to the terminals of the component you’re testing.
- Continuity (a beep, or a resistance reading close to zero) means the component conducts electricity — it’s intact.
- No continuity (no beep, or an “OL”/open reading) means the circuit is broken — the component has failed.
Always test the entire failure chain before ordering. A dryer with a blown thermal fuse and a failing heating element needs both replaced. Buying them one at a time costs more in shipping and adds days of downtime.
A basic digital multimeter in the $20–$40 range is all you need for this. It’s the single most useful tool for appliance diagnosis — useful well beyond dryer repair for testing outlets, switches, and other components around the house.
When to DIY and When to Call a Technician for a Dryer Not Heating
DIY is reasonable when:
- You’ve confirmed the failed part with a continuity test
- The part is accessible and widely available (thermal fuse, heating element, igniter, valve coils)
- The repair cost is less than roughly 50% of the dryer’s replacement value
- The dryer is under 10 years old
Call a technician or qualified professional when:
- The 240V circuit or outlet is suspect — wiring and outlet repairs require electrical knowledge and the right tools
- Any part of the gas supply line, gas valve inlet, or upstream gas connections is involved — that’s licensed-professional work, full stop
- Multiple components have failed at the same time (often signals an underlying venting or electrical problem)
- After thorough testing, the diagnosis still doesn’t point clearly to a single component
- The dryer is past 10–12 years old and repair cost approaches replacement value
Frequently Asked Questions: Gas Dryer Not Heating vs Electric Dryer Not Heating
Can a gas dryer not heat even if the gas supply is fine? Yes. The igniter, flame sensor, and gas valve coils are the most common failure points in a gas dryer not heating, and all three are completely unrelated to gas supply pressure. If your stove and water heater are working normally, the problem is almost certainly one of these internal components.
Why does my electric dryer run but produce no heat? The most common causes are a blown thermal fuse or a lost 240V leg — both leave the drum running while cutting heat to the element entirely. A failed heating element is the next most likely cause once those two have been ruled out.
Can a clogged vent cause a dryer to stop heating? Yes. Restricted airflow causes heat to back up inside the drum, which triggers the thermal fuse or cutoff as a safety measure. Clearing the vent is step one, but the triggered component still needs to be tested and replaced — it won’t reset on its own.
How do I know if my dryer is gas or electric? Check the power connection: a 3- or 4-prong cord plugged into a 240V outlet means electric. A standard 120V plug plus a gas line at the back means gas. This distinction is the starting point for any gas dryer not heating vs electric dryer not heating diagnosis.
Is it safe to test a gas dryer myself? Component testing — igniter, valve coils, flame sensor — is safe when the gas supply valve is closed and the dryer is unplugged. Never work on the gas supply line, inlet fitting, or any upstream gas connection. That work requires a licensed professional.
Why did my thermal fuse blow again after I replaced it? The fuse is a symptom, not the cause. A blocked exhaust vent or a failing heating element creates the overtemperature condition that blows the fuse. Replace the fuse without fixing the root cause and it will blow again — sometimes within a single cycle.
Prevention: How to Avoid Repeat Failures
Most dryer heat failures are preventable with one habit: clean the exhaust vent at least once a year.
Lint builds up in the vent hose and exterior duct over time, restricting airflow even when the lint trap is cleaned regularly. That restriction is what causes thermal fuses to blow, cycling thermostats to trip prematurely, and igniters to work harder than they should.
While you’re at it, vacuum out the dryer cabinet around the lint trap housing — lint accumulates inside the cabinet itself, not just in the vent. A can of compressed air or a lint brush works well for clearing the areas around the lint trap and accessible interior surfaces that a vacuum can’t reach easily. Keeping that area clean reduces the fire risk and helps thermal protection devices function as intended rather than being pushed to their limits every cycle.
A non-contact voltage tester and a digital multimeter are worth keeping in your toolkit specifically for appliance diagnosis. When something fails — whether it’s a gas dryer not heating or an electric dryer not heating — you’ll be able to confirm what actually broke before spending money on parts. That’s the difference between a $15 fix and a $150 mistake.
Conclusion
Gas and electric dryers fail for almost entirely different reasons, which is why the gas dryer not heating vs electric dryer not heating distinction matters before you touch a single component. Gas dryers most often fail at the igniter, gas valve coils, or flame sensor. Electric dryers most often fail at the thermal fuse, heating element, or a lost 240V leg. Both types share thermal protection failures and vent-related shutdowns — and a clogged exhaust vent is the underlying cause often enough that it should be checked regardless of dryer type.
Diagnose by dryer type, test with a multimeter before ordering parts, and clear the vent before replacing any thermal fuse. That sequence alone will resolve the majority of dryer heat failures without unnecessary part purchases or repeat breakdowns.
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