No heat from the start
The drum turns and the timer runs, but the load stays cold and there is no warm air at the exhaust.
Start here: Start with the gas supply, cycle settings, and a quick airflow check. Then look for igniter activity.
Dryer Heating Problem
Whirlpool Gas Dryer Not Heating
Direct answer: If your Whirlpool gas dryer tumbles but does not heat, start with airflow and burner behavior. A clogged vent can overheat the dryer and trip a safety cutoff, while a glowing-but-no-flame burner usually points to gas valve coils or ignition parts.
Most likely: The most common path is restricted airflow through the lint screen housing or vent, followed by an open dryer thermal cutoff or a burner that lights once and quits as the cycle continues.
First separate no-heat from poor-drying. If clothes stay damp but the drum feels warm, you likely have an airflow problem. If the drum runs and there is no heat at all, watch and listen for burner activity after a cold start. Reality check: many gas dryers with 'bad heat' are really choking on a packed vent. Common wrong move: replacing the igniter before checking whether the burner is actually being starved by airflow or weak coils.
Don’t start with: Do not start by ordering a control board or guessing at gas parts. On gas dryers, the vent and the burner flame pattern tell you a lot before you spend money.
Runs but no heat at all?Check the gas supply, then watch for igniter glow through the lower front access area if your model allows it.
Heats once, then goes cold?Suspect restricted venting first, then weak dryer gas valve coils if airflow is good.
Last reviewed: 2026-04-17
What your Whirlpool gas dryer is doing
Heats for a few minutes, then stops
The dryer starts warm on a cold load, then later in the cycle the heat drops out and clothes stay damp.
Start here: Check the outside vent hood and run a short test with the vent disconnected. This pattern often points to airflow trouble or weak dryer gas valve coils.
Very little heat and long dry times
You feel some warmth, but it is weak, the cabinet gets hot, and loads take multiple cycles.
Start here: Treat this as an airflow problem first. Clean the lint path and check the full vent run before chasing internal parts.
Burner clicks or glows but never lights
You may hear a click or see the igniter glow, but there is no steady flame and no real heat output.
Start here: That usually narrows the problem to the burner side: gas supply, dryer flame sensor, dryer igniter, or dryer gas valve coils.
Most likely causes
1. Restricted dryer vent or lint buildup in the airflow path
This is the most common reason a gas dryer overheats, loses heat, or dries poorly. You may notice a hot cabinet, weak exhaust outside, or a vent hood that barely opens.
Quick check: Run the dryer on a heat cycle for a few minutes with the vent disconnected from the back. If heat returns or airflow feels much stronger, the vent path is the problem.
2. Open dryer thermal cutoff or high-limit thermostat after overheating
When airflow has been poor for a while, the safety devices on the heater housing can open and leave you with a drum that runs but no heat.
Quick check: If airflow has been weak and the dryer now has no heat at all, this moves near the top of the list. Confirm with a continuity test after unplugging the dryer.
3. Weak dryer gas valve coils
A classic gas-dryer pattern is heat on the first ignition, then no flame later in the cycle once the coils warm up. The igniter may glow, but the gas valve never opens reliably.
Quick check: Watch the burner area after startup. If the igniter glows and cycles off without a flame, or the dryer heats once and then quits heating, the coils are a strong suspect.
4. Failed dryer igniter or dryer flame sensor
If there is no flame and no heat, the burner may never be getting through the ignition sequence. A broken igniter often shows no glow at all.
Quick check: On a cold start, look through the inspection opening if accessible. No glow points toward the igniter, power through the heat circuit, or a safety device upstream.
Step-by-step fix
Step 1: Start with settings, gas supply, and the obvious airflow check
These are the fastest checks and they separate a simple setup problem from a real burner failure.
- Make sure the dryer is set to a heated cycle, not air fluff or a no-heat option.
- Confirm the gas shutoff valve to the dryer is fully open if you can safely identify it.
- Clean the lint screen fully. If it is coated with residue from dryer sheets, wash it with warm water and mild soap, rinse, and dry it.
- Go outside while the dryer is running and check the vent hood. It should open well and push a steady stream of warm air once the burner is working.
- If the hood barely moves or airflow feels weak, stop treating this like a parts problem and inspect the vent path first.
Next move: If airflow improves and the dryer starts heating normally again, you likely solved the issue without replacing parts. If the dryer still has no heat or only brief heat, move on to a controlled vent test.
What to conclude: A gas dryer needs strong airflow to keep the burner cycling normally. Weak airflow can mimic bad parts and can also damage safety components over time.
Stop if:
- You smell gas at any point.
- The vent connection is crushed, torn, or packed with lint deep in the wall where you cannot safely reach it.
- The dryer cabinet is unusually hot or you see scorched lint.
Step 2: Run a short test with the dryer vent disconnected
This is the cleanest way to separate a house vent restriction from an internal dryer heating problem.
- Unplug the dryer first.
- Pull the dryer out enough to remove the vent from the back.
- Check the dryer outlet collar for heavy lint buildup and clear loose lint by hand or with a vacuum.
- Reconnect power and run the dryer for a few minutes on a heat cycle with the vent still disconnected, keeping the test short so you do not dump excess moisture indoors.
- Feel for stronger warm airflow at the dryer outlet and compare it to what you had before.
Next move: If the dryer heats better or airflow is much stronger with the vent off, the house vent is restricted and the dryer itself may be fine. If there is still no heat with the vent disconnected, the problem is inside the dryer or at the gas supply.
What to conclude: A short vent-off test quickly tells you whether the burner is being shut down by poor airflow. If nothing changes, start looking at the dryer heat circuit.
Step 3: Watch the burner on a cold start and note the pattern
The burner sequence tells you which parts are worth testing. This keeps you from buying the wrong thing.
- Unplug the dryer and open the lower front access area or inspection port if your model has one.
- Restore power and start a heat cycle while keeping hands clear of moving and hot parts.
- Watch for this order: igniter glows, gas valve opens, flame appears, flame runs for a bit, then cycles off.
- If the igniter never glows, note that.
- If the igniter glows bright and then shuts off with no flame, note that too.
- If the flame lights once on a cold start but later stops coming back, let the dryer run long enough to confirm that pattern.
Next move: If you clearly see a repeatable pattern, you now have a much tighter diagnosis and can test or replace the right part. If you cannot safely observe the burner or the pattern is inconsistent, stop before guessing at gas parts.
Step 4: Test the dryer thermal cutoff, high-limit thermostat, and igniter with power off
Once airflow has been checked, these are the most common no-heat failures you can confirm with a meter.
- Unplug the dryer and shut off the gas supply before opening panels further.
- Locate the dryer thermal cutoff and dryer high-limit thermostat on the heater housing, and the dryer igniter near the burner assembly.
- Use a multimeter to check continuity through the thermal cutoff and high-limit thermostat.
- Inspect the dryer igniter for a visible crack or break, then test it for continuity if accessible.
- If the thermal cutoff is open, do not stop at the part itself. Recheck the vent path and lint buildup that likely caused the overheat.
Next move: If you find an open dryer thermal cutoff or a failed dryer igniter, you have a supported repair path. If those parts test good and the burner pattern showed glow-with-no-flame or one-time ignition, move to the gas valve coil conclusion.
Step 5: Replace the confirmed failed part, then prove the dryer cycles heat normally
The job is not done until the dryer heats repeatedly with good airflow and no overheating signs.
- Replace only the part supported by your testing or burner pattern.
- If the dryer thermal cutoff was open, correct the vent restriction before running full loads again or the new part may fail quickly.
- Reassemble the dryer, restore gas and power, and run a timed dry cycle with a small damp load.
- Watch for normal burner cycling and check outside for strong exhaust flow.
- If the igniter glows but the burner still will not light after you have confirmed good airflow and good safety parts, call for service rather than guessing at additional gas components.
A good result: If the dryer heats, cycles off and back on, and dries a small load normally, the repair path was correct.
If not: If the dryer still has no heat after a confirmed part replacement, the remaining issue may be wiring, the flame sensor, gas valve operation, or a less-common control problem that needs deeper diagnosis.
What to conclude: A good repair restores both heat and airflow. If heat comes back but the dryer still struggles to dry, the vent system still needs attention.
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FAQ
Why does my Whirlpool gas dryer run but not heat?
Most often it is poor airflow, an open dryer thermal cutoff from overheating, or a burner problem such as a failed igniter or weak gas valve operation. Start with the vent and burner pattern before buying parts.
Can a clogged vent make a gas dryer stop heating?
Yes. A restricted vent can make the dryer run too hot, shorten burner cycles, and eventually open a safety cutoff. It can also make the dryer seem like it has weak heat when the real problem is airflow.
How do I know if the dryer igniter is bad?
A bad dryer igniter often will not glow at all on startup, and continuity testing usually shows it open. If it glows bright but there is still no flame, do not assume the igniter is bad; that pattern often points elsewhere.
What does it mean if the dryer heats once and then stops heating?
That is a classic gas-dryer clue. Check the vent first, because overheating can interrupt normal cycling. If airflow is good and the burner lights once on a cold start but will not relight, weak dryer gas valve coils are commonly involved even though they are not a good guess-buy part without that pattern.
Should I replace the thermal cutoff and keep using the dryer?
Only if you also fix the reason it overheated. If the vent is still restricted, a new dryer thermal cutoff can fail again quickly and the dryer can keep running too hot.