Question about Dryers
Hi and welcome to FixYa, I am Kelly. I am assuming that your in a regular dry cycle and the timer is adancing rapidly. This is usually caused by a bad cycle thermostat. The thermostat is located on the rear face of the blower housing above be near the 4 inch circular ducting that goes to the rear of the unit. Pink / White wires - 503979 Thermostat cycling (Gas and Electric Models) S.P.D.T. - 3 terminals Measure resistance of the following terminals: Terminals 1 - 3 .............................. Open at 153° ± 5° F Heat thermostat with a small flame until a distinct click is heard. Terminals 1 - 2 .............................. Close at 138° ± 5° F Continuity < 1 W
(Item 24) This link:
Clicking on item 24 will bring up a detailed view.
You can check this with an Ohm meter and a match but you need to be quick. Cold it should read continuity. Heat it until it clicks then it should read open.
I am a bit perplexed by looking at the parts break down because most cycle thermostats have 3 terminals. One being common, one when cold would power the heating element and one when hot would provide power to the timer motor. Your timer is advancing because there is always power to the timer motor. There should only be power to the timer motor when the cycle thermostt is HOT. I.e above 155 deg F. It will continue providing power to the timer motor until the temp drops to 130 deg F at which time power is re-routed back to the heating element.
Inside the dryer usually glued to the side of the cabinet is a 4 x 5 envelope with a tech sheet inside that will have the details of your timers operation and checks.
Here is the 3 terminal thermostat details
The thermostat your looking for should have 3 terminals. DO NOT heat the thermal cut off with a match. It is a one time failure / must replace at that point item.
Thanks for choosing FixYa,
Pink / White wires - 503979 Thermostat cycling (Gas and Electric Models)
S.P.D.T. - 3 terminals Measure resistance of the following terminals:
Terminals 1 - 3 .............................. Open at 153° ± 5° F
Heat thermostat with a small flame until a distinct click is heard.
Terminals 1 - 2 .............................. Close at 138° ± 5° F
Continuity < 1 W
Posted on Nov 09, 2010
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Posted on Jan 02, 2017
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