How to Fix a Dryer That Won't Heat

A dryer that tumbles but produces no heat is one of the most frustrating appliance failures in any home. Your clothes come out damp, the cycle runs indefinitely, and you have no idea where to start.

A dryer that tumbles but produces no heat is one of the most frustrating appliance failures in any home. Your clothes come out damp, the cycle runs indefinitely, and you have no idea where to start. The good news is that the most common causes — a blown thermal fuse, a failed heating element, a bad gas igniter, or a stuffed vent line — are all DIY-friendly repairs that typically cost under $50 in parts.

This guide walks you through systematic diagnosis and repair for both electric and gas dryers. You will learn which parts to test first, how to use a multimeter to confirm failure, and exactly how to swap each component. By the end you will either have a working dryer or a clear picture of whether it is time to call a technician.

What You Need

Before you pull the dryer away from the wall, gather these tools and parts. Having everything on hand prevents mid-repair trips to the hardware store.

• Multimeter with continuity setting — essential for testing every electrical component
• Dryer thermal fuse replacement kit — matches your brand; often sold with the high-limit thermostat
• Dryer heating element — search your model number for an exact match
• Dryer vent cleaning brush kit — flexible rod set that reaches the full vent run
• Gas dryer igniter replacement — only needed for gas dryers that glow but fail to light
• Nut driver and screwdriver set — most dryer panels use 5/16-inch hex screws

Always search by your dryer’s model number (found on a sticker inside the door frame) to get the exact compatible part. Generic descriptions match many models, but part numbers guarantee a fit.

Safety First: Power and Gas Shutoff

Before touching anything inside the dryer, take these two steps:

1. Unplug the dryer from the wall outlet. Electric dryers use 240-volt circuits that can cause a serious or fatal shock. Do not rely on the power switch — pull the plug.
2. Shut off the gas (gas dryers only). Turn the shutoff valve on the flex line behind the dryer to the perpendicular (closed) position before disconnecting anything.

Keep the gas line connected throughout the repair. You are only accessing the electrical ignition and safety components, not the gas valve itself.

Step 1 — Clean the Vent Run First

This step costs nothing and resolves roughly 25 percent of no-heat calls. A blocked vent causes heat to back up inside the drum until a thermal safety device trips and cuts power to the heating circuit.

Pull the dryer away from the wall. Disconnect the vent hose from the back of the unit and from the wall cap. Feed the flexible brush kit through the full length of the duct, rotating as you push to dislodge lint, bird nests, or debris. Vacuum the loosened material as you pull the brush back. Reconnect the hose, plug in the dryer, and run a test cycle on high heat before opening the machine.

If the dryer now heats, great — clean the vent every 12 months going forward. If it still blows cold, continue to Step 2.

Step 2 — Test and Replace the Thermal Fuse

The thermal fuse is a one-time safety device mounted on the exhaust duct inside the cabinet. When the dryer overheats, the fuse burns open and permanently cuts power to the heating circuit. It cannot be reset and must be replaced.

Finding the fuse: On most front-load dryers, remove the lower access panel or the back panel to expose the exhaust duct. The thermal fuse is a small oval or rectangular component with two wire connectors, mounted directly on the duct housing.

Testing the fuse:

1. Disconnect both wires (note which terminal each wire connects to, or take a photo).
2. Touch the multimeter probes to each terminal of the fuse.
3. A healthy fuse reads near zero ohms or beeps in continuity mode.
4. A blown fuse reads OL (open loop) with no continuity.

Replacing the fuse: Unscrew the single mounting screw, slide out the old fuse, and slide in the replacement. Reconnect the wires to their original terminals. Thermal fuses are directional on some models — check your model’s diagram if yours has an arrow.

Important: if the fuse blew because of vent restriction, replacing it without clearing the vent will blow the new fuse within days. Always confirm vent airflow before calling the repair complete.

Step 3 — Test the High-Limit Thermostat

The high-limit thermostat sits near the heating element or on the exhaust duct and cuts power if the dryer temperature reaches a dangerous level. Unlike the thermal fuse it can reset itself, but it also fails open permanently after repeated overheating events.

Remove the thermostat (usually one or two screws and two wire connectors) and test it with the multimeter in continuity mode. A good thermostat shows continuity at room temperature. No continuity at room temperature means it has failed and needs replacement. Thermostats are typically sold in a kit with the thermal fuse for a few dollars more than the fuse alone — it is worth replacing both at the same time.

Step 4 — Test and Replace the Heating Element (Electric Dryers)

The heating element is a coiled resistance wire that heats the air blown through the drum. Over time the coil breaks, opening the circuit and stopping heat production even though the motor and drum continue to run.

Accessing the element: On most electric dryers, remove the back panel or the front panel depending on the manufacturer. The element sits in a metal housing with two or three terminal connectors.

Testing the element:

1. Disconnect all wires from the element terminals.
2. Set the multimeter to resistance (ohms) mode.
3. Touch probes to the two main terminals. A healthy element reads between 8 and 50 ohms depending on wattage.
4. An open circuit (OL on the display) confirms a broken coil.
5. Also touch one probe to the terminal and one to the metal housing. Any reading other than OL indicates a short to ground — replace the element.

Replacing the element: Unscrew the housing retainers, slide the old element out, and install the replacement in reverse order. Reconnect all wires to their correct terminals — refer to your photo from before disassembly.

Step 5 — Test and Replace the Gas Igniter (Gas Dryers)

Gas dryers heat air by igniting a burner flame. The igniter is a silicon carbide or nitride glow bar that heats to roughly 2,500°F to light the gas. When the igniter fails it either does not glow at all or glows but is too weak to open the gas valve coils.

Visual test: With the bottom panel removed and the dryer running on a heat cycle, watch through the burner opening. If the igniter glows orange for 60–90 seconds and then the flame never lights, the igniter is weak and should be replaced even though it appears functional. The valve coils require a specific amp draw from the igniter to open, and a weakened igniter never delivers enough current.

Resistance test: Disconnect the igniter connector and measure resistance across the igniter terminals. Most igniters measure 50–400 ohms when healthy. No continuity confirms a failed igniter.

Replacing the igniter: The igniter mounts to the burner assembly with one or two screws. Handle the new igniter carefully — the silicon carbide material is extremely fragile and will crack from finger pressure on the glowing tip. Hold it only by the bracket.

Step 6 — Inspect the Cycling Thermostat

The cycling thermostat regulates the normal operating temperature of the drum throughout a cycle, turning the heating element or burner on and off to maintain the set temperature. A failed cycling thermostat often causes the dryer to run cold or to overheat and then cut out.

Test it the same way as the high-limit thermostat — continuity at room temperature means it is functional. No continuity means it has failed open. Some cycling thermostats fail closed, causing the dryer to overheat; these are harder to diagnose without an IR thermometer but are worth replacing if all other components test good.

Step 7 — Reassemble and Test

Once you have replaced the faulty component, reassemble the panels in reverse order. Before pushing the dryer back against the wall:

1. Reattach the vent hose with a foil tape seal — no plastic or vinyl hose within 18 inches of the dryer connection.
2. Restore gas supply if applicable and check the flex line connection for leaks with soapy water.
3. Plug in the dryer, select a high-heat cycle, and load a damp towel.
4. After 10 minutes, open the door and confirm the drum is warm. After 30 minutes the load should be dry.

If the dryer heats now but still takes too long, the cycling thermostat or vent restriction is still partially limiting performance. Run a full vent cleaning pass and retest.

When to Call a Professional

Most dryer no-heat repairs are well within DIY reach. However, call a licensed appliance technician if:

• You smell gas after turning the supply back on (shut off immediately and ventilate).
• The gas valve coils test bad — replacing valve coils requires calibrated leak testing afterward.
• The electronic control board or motor is suspect — these have overlapping symptoms and can be expensive to diagnose without specialty tools.
• The dryer is over 15 years old and has needed multiple repairs — at some point replacement is more cost-effective.

A repair technician typically charges a $75–$100 diagnostic fee plus parts and labor, bringing most jobs to $150–$350. Weigh that against the cost of a new comparable dryer before committing to a complex repair on an older unit.

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