[vtphilk]

Welp..I have tried just about everything I can. I'm so confused on this one....

Does anyone know what the actual temperatures should be for Delicate, Medium, Regular?

It seems the cycle thermo never cuts off. However, if I put a flame to it it does. Also, I have two of them (One OEM and one new one I just replaced) and both do the same thing. I tested the voltage at the Purple, Red lines and it's always 120V.

The impedance for the other wires on the cycle thermo seem to be right as well. If I hit the switch to air fluf the red wire goes to 0v.

If I goto delicate it's 120V but the white wire is closed and 120v. If I goto medium then the white wire is closed but has a 10K resitance on it.

So it seems everything works just the damn thing still does not shut off the heater.

I took the vent off the back and pulled the dryer out. I cut it on and let it run for a few minutes and using a digital meat thermometer (All I had) the temp at the exhaust vent gets up to around 147F one delicate, regular, or medium.

I would think delicate would be closer to 100F but I can't find anywhere what the actual temps are suppose to be for the three modes. I know the hi limit cuts off at 200 but on the heater it self. So I can only assume this is the guy tripping to eventually cut the heater down to keep it at 147.

Anyhow, thanks for all your help so far. I'm so frustrated with this dang thing I'm about to go out and buy a new one.

[vtphilk]

One last thing...I'm re-reading all the posts just to be sure I didn't miss something. You mentioned the heater thermostat. I do not believe my unit has one. The schematic for my unit is:

http://www.servicematters.com/maytag...s/16023110.pdf

(See page 80)

I have a cycling thermostat(On fan exhaust), hi-limit thermostat (On the heater) and that is it.

I also have 2 thermal fuses but both test out ok.

So I was a bit confused by your post :

They do not use the thermostat's heater for Regular
They switch in the thermostat's heater and a 10 Kilohm resistor (in series) for Medium
They switch in the thermostat's heater by itself for Delicate
They disconnect the thermostat contacts for Air Fluff

What do you mean They don't use the thermostats heater for regular?

[denman]

You mentioned the heater thermostat. I do not believe my unit has one. The schematic for my unit is:
http://www.servicematters.com/maytag...s/16023110.pdf
(See page 80)

I could not find your wiring diagram at Page 80 of your attachment. I am using MDE7600AYW on Page 10-19


I have a cycling thermostat(On fan exhaust), hi-limit thermostat (On the heater) and that is it.

The cycling thermostat is the one that should be controlling your temperature. It has a heater inside it. This heater is between Wh and BK on the diagram

So I was a bit confused by your post :
They do not use the thermostat's heater for Regular
They switch in the thermostat's heater and a 10 Kilohm resistor (in series) for Medium
They switch in the thermostat's heater by itself for Delicate
They disconnect the thermostat contacts for Air Fluff
What do you mean They don't use the thermostats heater for regular?

The thermostat's internal heater adds heat to the thermostat's contacts so they open more often, shutting the HEATER off more often, reducing it's heat output.
To reduce confusion in the below explanation
contacts is the cycling thermostat' contact's
element is the heater inside the cycling thermostat
HEATER is the machines main heating element

AIR: Both contacts and element are disconnected so the HEATER is off.

Del: The contacts and element are connected. The thermostat gets heat from the HEATER and the element, this additional heat then opens the contacts often so the HEATER produces the lowest amount of heat.

Med: The contacts and element are connected but a 10 K resistor is also connected in series (in line) with the element. This reduces the current through the element, reducing the amount of heat it produces. The contacts then open less often than in Del and you get more heat produced by the HEATER

Reg: The contacts are connected, the element is not. So the only heat having any effect on the contacts is from the HEATER, therefore it produces the maximum heat.

I hope this explains it a little better

[vtphilk]

So it sounds like the only place my problem could be has to be that cycling thermo... But I've already replaced it and tested it with a small lighter flame. You think I could have gotten a bad one?

I purchased a new one and now I have swapped back to the old OEM one. Do these cycle thermos go bad alot?