I am replacing a Cycling Thermostat on my dryer and the part I was shipped has what looks like 4 wire connections when the original only had two. The new one has two brass leads near the center and then two silver leads spread apart. If I had to guess, I’m thinking I should connect the two brass leads to the wires available since that is similar to the original. I’m just confused as to why there is 4 versus 2. I’m also assuming there is not a polarity issue where I need to make sure which wire goes to which lead.
It will be a few days before I can do this because the original part received looked damaged from shipping (Fed-Ex).
Thanks, Mitch
Brand: Whirlpool Model Number: WET3300SQ0 Main Symptom: No heat. What happens & when:
Error Code (if any):
Parts or tests already tried:
Photos / video link:
I’m glad I asked. I’ve attached another picture. Where you see a red X there are three sets of two wire connections. Is the cycling thermostat one of these or am I not looking in the right area. I sure wish I had the dryer in the video because it was really simply located.
I’ve looked at the drawing but am still having a hard time spotting it. I know it’s number 42 in the parts picture.
Find the blower wheel and housing, this is where the lint screen goes. It is located on the inside of the blower housing, close to where the external vent is that take the air outside. Is this image the back side of the dryer?
Thank you David. I found it deep in the belly of the beast. I’ve attached a picture showing two red arrows. The lower arrow is where it was located. Directly under the other part you mentioned was the wrong one and behind a brown plastic cover which I removed from the front of the dryer with one screw.
Now once I receive the part in the mail, I will give it a try.
David, unfortunately the Cycling Thermostat was not the problem. I assume I will need to try the Thermal Cut-off Kit which is next on the suggested list.
Also, do you have any suggestions as to where this part is usually located. I’m thinking it is where I originally suspected the part to be with the red X.
I received my (43) Thermal Cut-off and I can easily see where it goes. However, there is another part included in the package (See pic attached) that I’m not certain about. Is that (41) Fixed Thermostat or is it (34) Thermal-Limiter?
Dave, look at the attached. My parts page is calling the (34) Thermal Limiter next to the (42) Thermostat Internal Bias. I thought (42) was the cycling thermostat. At least that’s where I put mine.
The part next to the (43) Thermal Cut-off is called the (41) Fixed Thermostat.
As a tech, I would call a fixed thermostat, the cycling thermostat, the two parts you got together, go side by side just like on the diagram. You did correctly
Got it. When I opened up the dryer back a few weeks ago, there was a lot of lint that had gotten everywhere because of a seam in the vent piping opening up.
My thoughts are to replace the heating element and order another Thermal Cut-off kit. Then do an even better job of vacuuming out the inside. Any areas to clean that I should pay particular attention to?
Make sure you have the shortest vent possible and good airflow to the outside. I would try and check the air temperature as well. With the dryer pulled out from the wall, leave the vent off, no clothes in the drum. Run it on high heat and with a thermometer that reads up to 200 degrees, watch the dryer cycle, the heat should get up to 160 or so, drop down 20-30 degrees and cycle back up to 160 ish. This is the cycling thermostat you are watching opening and closing. If it gets real hot, above 190 or more, it may trip the thermostat. This tells you if the cycling thermostat is causing the problem or not. A new element and a good vent should take care of the issue you are having.
Thanks, I’m going to order a new heating element, the Cycling Thermostat, and the Cut-off one as well. That’s a good idea to run it without the vent hooked up for a load or two. The exhaust goes straight down under the floor from the back of the dryer then 6 or 7’ to an outside wall. When I hook it back up I’ll have my wife turn it on while I check the outside to be sure there’s no blockage and that it’s blowing freely.
