Question about Kenmore Dryers
The drying circuit has to have a sensor to control heat and the timer controls time (on timed drying). Often sensors fail "open" and dryers stop drying. This sensor or the circuit seems to have failed closed (runs all the time). I suspect the sensor has failed in the drying control.
Posted on Jan 12, 2014
Symptom: Dryer turns on, drum spins, but you have no heat.
Any of the following components are more than likely suspect as being bad:
All these components COMBINED, should cost less than $100. If you fix it yourself, you will avoid the additional cost for labor.
If the dryer isn't blowing ANY air at all, but the drum still turns, you may have a bad blower fan assembly inside the dryer. Or, the blower fan assembly may be clogged.
If your dryer performance has been failing (i.e., clothes taking longer to dry), it may be for a reason. You need to ask yourself when the last time you cleaned the dryer ventilation. If you can't remember, or if it has never been done, this can contribute to the dryer failing. All dryers need proper air flow in order to dry properly. If the ducting becomes clogged, the heating circuits will actually overheat and eventually fail. This usually results in the Thermal Cut-Out (TCO) blowing or the Heating Element failing or BOTH. When these components fail, they must be replaced. Remove the dryer hose from the back of the dryer and inspect it thoroughly from where it leaves the dryer to where it exits your home. It should be clear with no kinks or clogs. If your vent line runs under a crawl space make sure it is suspended above the ground and has no sags where lint could collect. RULE OF THUMB: The SHORTER and STRAIGHTER the vent duct, the BETTER. After you inspect the vent ducting, turn the dryer on and make sure you have forceful air flow coming form the dryer. This will prove that your blower fan is working properly or not. Since you stated that your dryer is not currently heating, the air will be cold, but you should still have some force behind it. If the air flow is weak, you need to clean the duct work INSIDE the dryer. It is important to keep a dryer checked routinely. I recommend once per season (that's 4 times per year). Dryers are the cause of many house fires. These fires are due to lint accumulations inside the unit catching on fire. A little preventive maintenance can prevent significant problems in the future.
Getting to the heating circuit to determine if the components are good or bad is the next step. If your dryer has the lint screen on the top of the unit, you will need to remove the back panel of the dryer to expose the heating circuits. If the dryer has the lint screen in the door, you will need to remove the lower kick panel under the door by using a putty knife to release the retaining clips. They will be located along the seam in the front about 2 inches in from each side. If this is a Kenmore Elite or Whirlpool Duet, the lower lick panel comes off by removing the screws under the bottom edge of the panel. (HINT: placing a block of wood under the front feet of the dryer can make access much easier). If your dryer has no lower kick panel, you have to remove the entire front panel on these models. This is accomplished by lifting the dryer top and removing the screws that hold the front panel in place.
NOTE: The heating circuit should be troubleshot with the dryer UNPLUGGED. Dangerous voltages are still present with the dryer turned off. Resistance readings are as follows:
Heating Element (located inside heater box) - remove the two leads from the ceramic terminals on the heating element and take a reading across the terminal points. It should read 9 - 13 ohms.
Thermal Cut-Out (TCO) (mounted to the heater box.) - unplug wires and take reading across connector tabs. Reading should be 0 ohms.
Hi-Limit Thermostat (mounted to the heater box, closest to the heating element leads) - unplug wires and take reading across connector tabs. Reading should be 0 ohms.
If any of the above readings are abnormal, replace the component. NOTE: If the TCO or Hi-Limit Thermostat is defective it is highly recommended by most manufacturers to replace BOTH components at the same time. They are often sold as a set. Without doing so, these components can cause potentially fail again.
NOTE: One item I failed to mention - Double check the input power for your dryer FIRST. You should have 220VAC at the receptacle and terminal block. The dryer will STILL tumble and the timer will still function with a portion of the input power missing as these circuits only require 110VAC. The heating circuits, however, require 220VAC to function. If one leg of the receptacle voltage is missing the dryer may exhibit "No Heat" like symptoms. This could also be an indication of a burned or failed power cord. Continuity checks performed with the dryer UNPLUGGED should indicate a short between the prong end of the cord and the respective lugs at the terminal block.
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Posted on Sep 30, 2010
it sounds like a clog in vent.if yours vents up thru roof you may need to have a chimney sweep come out and sweep vent.check and make sure the vent hose is net kinked or full of lint.
Posted on Mar 06, 2009
a Kenmore Electric Dryer Model 110.62942100
Dryer not heating
I just spent several hours repairing my electric clothes dryer, and wanted to share my experience with others that may wish to do a similar repair. Some of my time was spent reading online postings similar to this one. The majority of my time was spent driving a few times to the Sears Parts Outlet, until I finally got all of the right parts. I could have saved myself a lot of time and effort by doing some simple testing up front. And these tests are real simple, which I will explain below. I wish I knew then what I know now about the repair and troubleshooting steps. It was actually quite easy.
First, the Owner’s Manual is vague about the repair. Under troubleshooting, there is the category of “Not Drying Satisfactorily” with a possible cause that “One fuse is blown or circuit breaker is tripped. The dryer will appear to operate, but you will not get any heat.” The solution says “Replace fuse or reset breaker”. In my case, the circuit breaker was obviously not tripped since the blower motor and controls were still working on the dryer. With that, it felt like the Thermal Fuse 3390719 was the culprit.
Start by unplugging the dryer. Then, the Toe Panel at the front bottom of the dryer comes off easily by inserting a flat head screwdriver along the top edge of the panel, about 4” from the left and the right sides. Pull forward as the screwdriver presses on the retaining clips. The panel is supported by two clips at the bottom, and will then just lift off.
What I found when the toe panel was removed was several years of lint, dust, and animal hair. A surprising amount all over. Having seen this, I suggest that part of Spring cleaning is to remove the toe panel and vacuum the inside of a dryer. Next, to reach the thermal fuse easier, remove the black metal lint duct assembly. Start by removing the lint screen from inside the dryer. Then, remove the two ¼” sheet metal screws on the left and the right of the duct. Now, the only thing holding the lint duct in place is a metal clip at the bottom left, which is pinched in place to the dryer frame. I used a flat head screwdriver to pop it off. The lint duct assembly can now be removed. Here also, I was surprised at how much lint had built up inside the duct. Clean it out thoroughly. Any build up can restrict air flow and waste energy, or be a direct cause to the No Heat problems of the dryer due to poor air flow and heat build up.
With the lint duct out of the way, the thermal fuse is accessible on the top right of the blower housing, as well as the Thermistor 3976615 on its right. What I should have done right here is take the blue wires off of the thermal fuse connectors, and tested it in place for continuity with the fuse still in place. Clean off any dust built up on the inner face of the fuse itself. A basic tester sounded a beep when I touched both connectors, which indicates continuity – or that it is still a good fuse. Install new fuse if needed, and reconnect the wires.
I would do a little more testing first prior to attempting to turn the dryer back on. After all, if the fuse blew, there was a reason. There may still be other things to consider, and you don’t want to risk blowing a brand new fuse.
At this point, I firmly recommend removing the Heater Box and Wire Heater Element assembly. I say this because it actually becomes easier to clean out burnt lint as well as test a few more things. There was enough lint all around and inside this and in the back of the assembly that could have caused overheating due to poor sensor readings.
Start by removing the heat plate at the front. Then, disconnect the six wires from the three devices: heater element, Thermal Cut-Off 3977394 and the Thermostat 3390291. I wrote down the color sequence of the wires to make certain to put them back on the same way. Next, remove the two screws at the bottom of the mounting plate that holds the assembly in place. The heat assembly should now wiggle around some, and be connected at the back of the dryer. There are no screws at the back – all you need to do is rotate the heater assembly counter clockwise about a quarter turn, and it should come out. The entire heater assembly can now be removed from the dryer.
With the Greenlee, I tested for continuity on all three devices: Heater Element, Thermal Cut-Off, and the Thermostat. All three should return an audible beep from the tester, indicating continuity exists. In my case, only the Heater Element was bad and actually had a break in it from overheating. One screw holds the heater element in the housing, so it is easily removed. I had to press on the housing a little to unbind the sides of the heater element, and then it slid right out. The housing can now be cleaned out. Assuming the thermal cut-off and the thermostat tested fine for continuity, all I would do is reach inside the heater housing and clean off the lint and dust build up on these devices, since they appear to be working. Install the new heater element.
While I had everything apart, I cleaned out the flexible duct in the back, vacuumed everywhere inside and out, and even used compressed air to clean out any remaining lint and dust that I could. Reassemble the heater box into the dryer in reverse order. Make sure all of the wires are properly reconnected to all of the devices. Make sure everything is screwed back together properly. Now, reassemble the lint duct by attaching the clip to the dryer and setting the duct in place, and then screwing the two screws back in place. Plug the dryer in and turn it on. If all went well, the heater element should glow orange and there should be heat
Posted on Jul 23, 2010
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