Thread Number: 56058
turbidity sensors in dishwashers, this has been perplexing me ??? |
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Post# 784258   9/17/2014 at 19:36 (3,479 days old) by verizonbear (Glen Burnie )   |   | |
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Post# 784325 , Reply# 2   9/18/2014 at 00:13 (3,479 days old) by logixx (Germany)   |   | |
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Post# 784328 , Reply# 3   9/18/2014 at 00:18 (3,479 days old) by murando531 (Augusta, Georgia - US)   |   | |
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I believe that detergent would technically count as "soil" if used in the prewash cup, which would prompt the dishwasher to treat the first fill as a prewash so that it drains and refills before opening the main cup, preventing an overdose of detergent.
The 2013 Maytag I have is a slightly updated and improved Whirlpool tall-tub, and the soil sensor is right under the sump grate just out of view. The machine pauses a few times throughout the first water charge, and it is then that the sensor activates. If the water is dirty enough, it will do an active purge, simultaneously draining and filling for about 6-7 seconds, cleaning out the filter accumulator in the process. If the water is still dirty enough after 2 or 3 purges, it decides to fully drain and refill for the main wash. There are pauses throughout the main wash and rinses for the exact reason jerrod6 pointed out, which simply decide if the water is clear enough for shorter washes and rinses, and whether or not an extra rinse is needed. I only use Normal wash for the most part, yet every cycle seems to be slightly different from what I've noticed. Sometimes it would prewash before the main wash, and sometimes you'd hear the detergent cup pop open after about 10 minutes of just the first water fill. When I had a box of Cascade and poured a little into the prewash cup just as a boost along with the tablet, the machine would always execute a water change before the main wash. |
Post# 784344 , Reply# 4   9/18/2014 at 02:20 (3,479 days old) by washer111 ()   |   | |
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I've heard about this, and am absolutely perplexed about it.... Soil-sensing is reasonable enough, but load sensing? How? |
Post# 784383 , Reply# 5   9/18/2014 at 06:21 (3,479 days old) by henene4 (Heidenheim a.d. Brenz (Germany))   |   | |
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2 ways: 1. Amount of water needed to wet the load (water that pools on top of cups and water captured on surfaces), measured either by variance in pump amperage or by the water level sensor. 2. Rise of temperature per time. More dishes equal more energy needed to heat up. |
Post# 785243 , Reply# 9   9/23/2014 at 04:20 (3,474 days old) by jkbff (Happy Rock, ND)   |   | |
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Load sensing, I am guessing thats why my Maytag starts and stops so many times during the first fill. It fills a bit, pumping the water and monitors the pump to see how much air is pumped through with the water (pump cavitation)... When the pump just stops pumping air through it stops filling. I've timed this between times I've had both racks full, either rack full, both racks full of plates and bowls or the top rack full of cookware and the bottom rack with containers.. All of the times are different from each other and the times with just one rack full or big bulky items are in the dishwasher the fill times are shorter than full loads or loads with lots of little items.
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