Thread Number: 42463
Moisture Sensing Accuracy and Location of Electronic Sensors In the Dryer Drum |
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Post# 624718   9/13/2012 at 16:48 (4,214 days old) by verizonbear (Glen Burnie )   |   | |
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Since doing laundry in my Affinity set that came with the house, I have been astounded how accurate the the auto dry cycle is and and pretty much never have anything come out damp . The moisture sensor is part of the lint filter which is at the door and the front of the drum. I've used a Kitchenaid ( Whilpool Duet ) and the sensor is on the back of the drum near the air vent . If I remember correctly, Maytag actually had the moisture sensor on the tumbling vanes.
So in order of Moisture Sensing sensitivity I would say 1. Drum Vane Sensors 2. Front Drum Sensors 3. Back Drum Sensors 4. Thermostatic Exhaust Sensor Your Thoughts ? |
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Post# 624750 , Reply# 1   9/13/2012 at 19:43 (4,213 days old) by tecnopolis (Ocala/Dunnellon, Florida 34481)   |   | |
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Post# 624752 , Reply# 2   9/13/2012 at 19:50 (4,213 days old) by tecnopolis (Ocala/Dunnellon, Florida 34481)   |   | |
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Post# 624761 , Reply# 3   9/13/2012 at 20:37 (4,213 days old) by DADoES (TX, U.S. of A.)   |   | |
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Left side of the transverse-oriented drum, on the air/filter grill. Sensor performance is excellent, even with blankets, comforters, bedspreads, etc. I have a couple (identical) sets of very plush bath towels that trip it up (toward dampness) when dried by themselves but fare better with other items. Everything else comes out consistent and nicely dried. |
Post# 624971 , Reply# 4   9/14/2012 at 17:01 (4,213 days old) by logixx (Germany)   |   | |
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Another vote for drum vane sensors. I never quite understood why those huge drums only have relatively small sensor strips, when the smaller European drums have (had) the sensors in the drum lifters.
I used to use an Electrolux dryer that actually sensed moisture using the entire drum. It was amazing and would even dry one item on its sensor cycle. My current Bosch Axxis has sensor strips near the opeing, which works fine as well. |
Post# 625142 , Reply# 5   9/15/2012 at 09:41 (4,212 days old) by combo52 (50 Year Repair Tech Beltsville,Md)   |   | |
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Of all the different dryer designs I have used I have never had a problem with any doing a Great Job of sensing clothing dampness. Sensors mounted on the moving parts of the dryer [ drum ] are always going to be the most likely to cause some type of problem as they must relay on brushes to stay in contact with the drum. |
Post# 625144 , Reply# 6   9/15/2012 at 09:48 (4,212 days old) by Pulsator (Saint Joseph, MI)   |   | |
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I'd like to put forward what is in my opinion one of the worst designs of moisture sensor placement: the Electrolux Wave Touch Dryer. They put the sensor strip on the rear of the drum underneath the hot air intake into the drum. It's terrible! When using a sensor dry cycle, I have to run it two or three times before the load actually dries! It blows all the clothing away from the sensor bar and shuts off prematurely! I've checked for any possible problems, cleaned off the sensor bars, etc and it still can't dry things. I gave up months ago and just use the timed dry cycle for everything! Kind of a pain, but at least I can dry stuff... :P
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Post# 625917 , Reply# 10   9/18/2012 at 13:41 (4,209 days old) by mrx ()   |   | |
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Where are Miele dryer's sensors? |
Post# 625922 , Reply# 11   9/18/2012 at 14:01 (4,209 days old) by glenfieldmathk1 (Glenfield-Leicester-UK)   |   | |
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Miele have a sensor all the way around the drum I think:) This vid should help:) CLICK HERE TO GO TO glenfieldmathk1's LINK |
Post# 625936 , Reply# 13   9/18/2012 at 14:56 (4,209 days old) by redcarpetdrew (Fairfield, CA)   |   | |
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I always wondered if the system itself affected results. By that I mean the sensing circuit. For example, older Maytags among other brands, used (uses still) a sensor system where one bar is wired to the electronic control while the other is wired directly to chassis ground. I've seen this system malfunction when the incoming power has issues such as spikes or feedback from, say, nearby shop equipment or the like or if the dryer is improperly grounded. Usually, this can be improved or solved by just attaching a ground wire from the chassis to a cold water pipe. Others have both sensor bars wired directly to the control. I would suspect the latter to have a possibly slightly higher degree of accuracy...
RCD |
Post# 626390 , Reply# 14   9/20/2012 at 17:18 (4,207 days old) by Philip0603 ()   |   | |
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My Miele has both temp and moisture in the exhaust airflow as it is a bit older. |
Post# 626467 , Reply# 16   9/20/2012 at 23:11 (4,206 days old) by redcarpetdrew (Fairfield, CA)   |   | |
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The dryer should always be grounded thru a properly wired outlet, first and foremost. I was talking about a secondary ground strap. Maytag actually packaged a loop of aluminum wire with a special connector designed to be secured to the cold water supply line with the washers and dryers in the box until around the late 90's or early 00's. One of the reasons for this was most likely the fact that Maytags were usually found in older homes with two prong ungrounded 110v outlets...
RCD |
Post# 626495 , Reply# 18   9/21/2012 at 01:53 (4,206 days old) by redcarpetdrew (Fairfield, CA)   |   | |
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I agree. What I was taught was that sometimes heavy machinery elsewhere in the house or even next door can send some sort of 'feedback' thru the neutral and mess with the electronic control. Maybe it could be dirty power. Maybe it could be an issue with how the dryer is grounded thru the neutral. It could even be the electrical of the house. All I know is I have a dryer that has issues with the electronic shutoff that cannot be solved elsehow. I ground the cabinet to the cold water shutoff and, low and behold, the system now works like it should...
RCD |
Post# 626510 , Reply# 19   9/21/2012 at 04:44 (4,206 days old) by ozzie908 (Lincoln UK)   |   | |
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Post# 626638 , Reply# 20   9/21/2012 at 18:09 (4,206 days old) by qsd-dan (West)   |   | |
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Post# 630009 , Reply# 23   10/7/2012 at 11:46 (4,190 days old) by super32 (Blackstone Massachusetts)   |   | |
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I have had and used many different methods thru my very short time on this earth. I agree with many and liked the older MT with the sensors in the fins. I always thought it had a better chance since the clothes have to touch it no matter how large or small the load. I had a WP that had the sensor in the back. I hated that dryer. Drying jeans in that dryer was always a project. I soon switched to a different brand (MT) and was much happier with the results. I'm currently using a platinum edition Bosch Nexxt. It has plenty of different settings and modifiers so wether I want damp, or bone dry I can set it to do what I want. I think the other factor these days is a lot of newer dryers (mine included) are designed to move the clothes from front to rear in addition to just tumbling in a circle. This allows each piece of clothing it's time in the path of air/heat.
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Post# 630049 , Reply# 24   10/7/2012 at 16:01 (4,190 days old) by Jetcone (Schenectady-Home of Calrods,Monitor Tops,Toroid Transformers)   |   | |
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Post# 630053 , Reply# 25   10/7/2012 at 16:55 (4,190 days old) by rinso (Meridian Idaho)   |   | |
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Our Electrolux IQ dryer has the moisture sensors on the back wall, and on the wrong location for the tumbling action. Even a full load of clothes hardly touches them. As a result, its drying accuracy suffers. |
Post# 630252 , Reply# 26   10/8/2012 at 15:13 (4,189 days old) by Tomturbomatic (Beltsville, MD)   |   | |
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A dryer can usually be leveled to tip slightly to the back to make the load more likely to tumble against the sensor if it's at the back and vice vers if it is at the front. Having the sensors near the exhaust port encourages the load to contact the sensors. |