This post will help you trouble shoot a Whirlpool gas dryer that has a turning drum, but isn’t getting any heat. These are the most common reasons why your dryer may not be getting heat. The part numbers mentioned below are some of the most common parts, but to be sure that they will work for you dryer, be sure to do a model number search here:
The first thing that you need to do is to check and make sure that your gas is on to your dryer. (I know seems pretty obvious.) Now put your dryer on a heated cycle like timed dry, basically anything but air fluff. Next pop off the peak hole cover and take a peak (It’s usually found in the front bottom left corner of the dryer.).
If your igniter doesn’t glow orange, then you will first want to check your thermal fuse. The thermal fuse is non-resetting, so if it’s bad, it has to be replaced. To access your thermal fuse, unplug your dryer and then with a 1/4″ hex driver begin to unscrew all the screws that secure your dryer’s back panel. Here’s a pic of my son taking off the back panel.
After all the screws are removed, you will be able to take the back panel off. Set it to the side. Next locate the thermal fuse. The white arrow in the picture below is pointing right at the thermal fuse. Remove one wire off the thermal fuse and check for continuity with an ohm meter (see second pic below).
If your thermal fuse doesn’t have any continuity, it’s bad and needs to be replaced. Replace it by unhooking the remaining wired and then unscrew the 1/4″ hex head screw. Install the new thermal fuse. If your thermal fuse is bad, there is something that caused it to go bad. The thermal fuse is there for safety purposes. When your dryer over heats, instead of catching fire, the thermal fuse blows, raining on your parade. Usually the chute is full of lint causing your dryer to over heat. Remove the chute by removing the 1/4 hex head screws that hold it in place. Also remove the two Philips head screws on the top of the dryer where your lint filter goes.
It would also be wise to check and clean the vent that connects to the back of your dryer to the outside of the house. If your not finding much lint build up, replace the cycling thermostat while your at it.
If your thermal fuse checks out okay and your igniter is not glowing orange, next we will check the igniter itself. If the 2 Philips head screws aren’t already removed in the above picture, you will want to do that. Next using a putty knife locate the two clips (usually plastic) that hold the top panel in place. Now push the putty knife in to disengage the clips. The top panel should now open up like a car hood. Lean it against the wall.
Now locate the (2) 5/16 hex head nuts in the top left and right side corners of the dryer. Unscrew the two screws. Next, unhook the door switch by using a small flat head screwdriver. Be careful not to stab yourself. The front panel can now be removed by picking up and pulling the front door panel away from the dryer.
You can now locate the igniter, unplug the harness from the igniter, and place a lead on each terminal seen below (see pic below). If you don’t have continuity, replace the igniter.
These valve coils are the most common valve coils, but to be safe, do a model number search above to be sure that these coils are for your gas dryer.
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As you take a look into the peak hole (mentioned above) and you see an orange glow, but there’s no flame, you likely have bad valve coils that need to be replaced. (Please note: your dryer cycles on and off to maintain the correct temperature so the best time to check for flame is when you first start it up.) Valve coils can be a little tricky to diagnose because sometimes they work for a short time and then they cease up not allow gas to release.
I’ve been repairing used washers and dryers at this time for almost a year and a half. I have yet to come across a bad flame sensor. With that said though, it’s still a pretty common part to malfunction. If your igniter glows orange continually and never clicks off, your flame sensor is bad.
When I first started repairing dryers, I would watch the below video over and over. It’s the best video that I know of on troubleshooting a no heat issue.