The dryer has four heat settings: very low, low, medium, and high. Seems like the dryer is always on very low or low and takes a long time to dry. Changing the heat settings does not seem to change the amount of heat in the dryer. Heating element heats to a red glow. There is a thermostat next to the heating element, another about 20 inches directly above it where the heated air enters the drum, and a third thermostat near the exhaust and exhaust fan.
Dryer and vent to outside have been thoroughly cleaned providing a forceful flow of exhaust air.
Can the integrity of the heating element and the three thermostats be checked with an ohm meter? If so, what would the appropriate readings be?
I understand that the heating element only puts out one fourth the amount of heat if the element is shorted to the case. How can one determine if this is the case?
If the exact cause cannot be determined, is there an priority order for troubleshooting the problem?
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Re: Poorly heating clothes dryer
Best way to test the elements and stats is to disconnect each one in turn, and with your meter set on the ohms range ,test each one in turn for continuity, you should get F.S.D.(full scale deflection) on each component.
Another way to test the element, is to bypas the stats, and connect the 240v suplly directly to the element, it should get red hot, but do not leave it on for more than a few seconds..
If it had gone down to earth, then theoretically it should trip the circuit breaker.
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It may be as simple as checking your lint filter.
If you use fabric softeners sheets, they tend to clog the lint filter holes. Washing it with soap and water will restore it back to normal and will allow the circulation that the dryer needs to properly dry your clothes.
If your dryer seems to run forever, 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, clean the vent and/or internal ductwork.
Your dryer's heating element may be partially burned out. If it is, your dryer still heats, but at such a low temperature that it takes three or four times as long to dry the clothes. If the element is partially burned out, replace the heating element. You can check for an ohm reading but will need to refer to the service manual for proper reading. This sometimes on the tech sheet located somewhere on the dryer. Usually between 9-13 ohms.
Although this isn't a common problem, one of the thermostats that controls the temperature in your dryer may break and cause the dryer to heat poorly. If so, you need to replace it. The thermostat is usually a small, round, black device mounted to an oblong steel plate. The plate is mounted to the internal ductwork . This thermostat usually has four wires going to it. Check the 2 terminals that are opposite each other and are the closer together of the 2. These 2 terminals should have continuity. If not replace the thermostat. This is a Free answer, Please rate me.
First off.. befor we talk about changing parts you need to verify that your circuit breakers are set properly. Manually push the dryer CB to the off position... and PUSH to off with conviction then turn it back on again. Test your high heat setting once again. If it works you had one of 2 CB's tripped. If it still shows the same symptoms then there are a couple of suspects.
the vavle in using high heat only comes in to play when you have a load of towels or some other heavy cotton,,thats what high heat is mainly for,,more moisture,,,on the norm medium with a regular load is the way ..now go to the dryer and look at the back vent where the heat comes out does it look like burnt and dark as if you burnt shirt and it stuck to the iron,,that comes from high heat scortching,,rubber in elastic in your sock and other clothing...onthejob slow low and steady