If your gas dryer tumbles but no heat, it could be because of a clogged vent or internal ductwork. Your dryer may have an automatic cycle that turns off the dryer when the clothes are dry. It does this with a special thermostat or moisture-sensing system.
Normally, this is what happens during an automatic cycle:
The thermostat tells the dryer to heat until the interior of the dryer reaches a pre-set temperature--say 135 degrees.
When the dryer reaches the pre-set temperature, the thermostat tells the timer to begin advancing. (If there's a moisture sensor, the timer advances only if the moisture content of the clothing is low enough.)
The timer advances until the interior cools, then the thermostat tells the timer to stop advancing, and tells the dryer to start heating again.
This cycle continues until the clothes are dry. But…if the vent is clogged, the dryer may never reach the proper operating temperature, so it doesn't send the signal to the timer and the dryer continues to run
indefinitely, even if the clothes are completely dry. To fix the problem check out this video clean the vent and/or internal ductwork.
These are all different types of safety fuses located on your gas dryer. These are located in several different areas of the heating duct depending on the model. They are all easy to replace and all you need to do is check them for continuity. If they do not have continuity replace them, if they do they are good. Usually if you get some heat from the dryer these will not be the problem. If you have no heat at all and you already checked the dryer coils The rest of the sensors including the Thermal Fuse Or Hi Limit Thermostat, Radiant Heat Sensor And Cycling thermostat can all be accessed by the instructions at the bottom of page
Here's how the dryer thermal fuse works:
Overheating Protection: The thermal fuse is a safety measure to prevent the dryer from reaching excessively high temperatures, which could potentially cause a fire.
Heat Sensing: The thermal fuse is made up of a heat-sensitive material that expands or melts at a specific temperature. When the temperature inside the dryer exceeds the fuse's rating, the material activates and breaks the electrical circuit.
Interrupting Power: Once the thermal fuse is blown, it cuts off the power supply to the heating element or the entire dryer. This action prevents further heating and protects the dryer from potential damage.
Resetting: Unlike some other components, the thermal fuse is typically a one-time-use device and does not reset itself once it has blown. If the thermal fuse blows, it indicates an overheating issue that needs to be addressed before the fuse can be replaced.
If the dryer is not producing heat or is not turning on at all, a faulty thermal fuse may be the cause. In such cases, it is important to inspect and test the thermal fuse using a multimeter to determine if it has blown. If the thermal fuse is indeed blown, it should be replaced with a new one of the same rating. It is crucial to identify and address the underlying cause of the overheating to prevent the new thermal fuse from blowing again.
On many dryers, there's a thermal fuse (a heat-sensitive fuse that blows if the dryer overheats) mounted to the exhaust duct inside the back cover panel or behind the front panel. The fuse is about an inch long. It's usually embedded in black resin and mounted in a white plastic housing or is sometimes round and made of metal and plastic.
The thermal fuse allows power to run thru it. Anything creating an overload of power could cause this fuse to blow. Some dryers use more than one thermal fuse. They vary in location depending on the model. They are usually located on the blower housing or near the heating element. They are easy to check with a multimeter. Place one test lead on each terminal and you should have a reading of zero if not you will need to replace the dryer's thermal fuse. To remove or test the Thermal Fuse Follow these instructions here.
Locate the thermal fuse:
Many newer dryers have a lower access panel that can be removed. If yours does not try this here
First Disconnect Power
Pull Dryer away from wall to give access.
Then you should see two screws located at back top of dryer (As seen in photo)
Remove these two screws.
Now you will be able to grab the top by the sides and push back panel slightly and lift off.
Now that the top is off. This allows access to the two screws holding your front console on. At the top usually one on each upper corner you will see a screw. (As seen in photo) Before removing these screws take a photo of wiring on the back then remove screws.
If you are removing the console unplug any connectors make sure to have good photo of the wiring. Now remove the console. Usually, enough wire to swing out of the way if not removing completely.
This will give you access to the 2 top screws of the front panel. As seen in photo. Do not remove these screws yet we will come back to them.
Best to remove the 2 screws at the bottom of the dryer front panel. You might need to prop up the dryer to get access.
Next there are usually 2 screws located behind the door on the front panel. Remove these 2 screws.
Photograph connector at door switch and light. Now remove the 2 top screws exposed earlier. Hold the front panel in place as you remove these screws. Slowly tilt the panel forward and unplug remaining connectors. Panel is now removed. The tub is now easily moved so be careful it can fall out on some models.
The Blower wheel housing will be located in the bottom of the dryer. The Thermal Fuse is located on the duct coming from the blower wheel housing.
To Test the Thermal Fuse. Place one test lead on each terminal and you should have a reading of zero if not you will need to replace the dryer's thermal fuse.
Disconnect the wires:
Gently pull the wires off the thermal fuse terminals. Some thermal fuses have push-on connectors, while others may have screws securing the wires. Make a note of their positions or take a picture for reference.
Remove the thermal fuse:
Depending on the type of thermal fuse, it may be secured with screws or clips. Remove any screws or release the clips to take out the thermal fuse from its housing.
Attach the wires to the new thermal fuse, making sure they are properly seated and secure. Refer to your notes or the picture you took earlier to connect the wires correctly.
Reverse the procedure to Reassemble the dryer