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On the low setting it's running too hot and shrinking our clothes. I opened the back and tested the temperature at the exhaust, and it cycles between 120 f and 160 f or so on both low and high settings. Printed on the selector switch it says the resistor attached should read 6200 ohms and I tested it at 4200 ohms. WOuld that make a difference? It has a purple and blue wire going to the timer. How does it regulate three choices (low/med/high) with only two wires? Is it done at the thermostat? What else would cause this? I was hoping there was more than one heating coil that maybe I could disconnect, but it only has one. Help?
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Replace the cycling thermostat, four wire, located on the blower housing AP3131939
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I will do that, and thanks, but it still doesn't explain to me how a dryer can have three heat selections as I discribed. THere is only two wires coming from the switch to the timer, and there is a resistor that goes from the two outside poles of that switch that is 6200 ohm. ( I measured it at 4200). Can you explain to me in laymens terms how this dryer can do that? Mechanically in my mind, it doesn't make sense. If it had a selector switch with 3 wires I could visualize it, but then again, it would have to change the thermostat somehow (which is constantly cycling the same) or some how reduce the voltage to the heating element. (because there's only one element and it's not as if you can choose between having two elements on at the same time or one.) Once again thanks for your answer, but can you go one step more and satisfy my curiosity?
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The thermostat has a heater in it and the selector ether puts nothing on it, or 115 volts, or 115 through a resister to drop the power.
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Thanks for your reply... have a great day!
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Originally Posted by: richappy The thermostat has a heater in it and the selector ether puts nothing on it, or 115 volts, or 115 through a resister to drop the power. I changed the thermostat, and checked the voltage on the heater. It in fact read three different voltages going to that heater. Is it safe to assume that with no power it's on high, reduced through resistor is medium, and full 115v is on low?
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Rank: Advanced Member
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With this concept in mind, it takes the shrinking of some of our expensive clothes to tell us that the internal heater could be bad. Internal heater broke = thermostat regulating at normal cycle temperature = highest temperature. Since this is the case, and since we never use the dryer on anything other than low, couldn't we replace this with a thermostat that cycles at a lower temperature? What would this temperature cycle be equal to without the internal heater? (with the heater was 155-20)
Thanks for all of your help. I've learned something new about dryers. After checking my old thermostat, I checked the resistance across the terminals for the internal heater and found it open (no reading) and now the light has come on, and I have a understanding of what the heck is going on.
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You can stick in a L145 degree thermostat, should regulate at a "standard" 145 degrees.
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