[Captain Pete]

Kenmore Seies 70 dryer. Manual dry works fine, but the auto dry cycle does not dry clothes. Want to know what may cause this and what parts are needed to repair it.

[denman]

Here are your parts
Parts for Kenmore Dryer 11064742400 - AppliancePartsPros.com

See the attachment for the wiring diagram.

I timed dry the timer motor gets power through Timer Switch 0 TM/WB contacts whenever the motor is on.

In auto modes the timer motor gets power through Timer Switch 0 TM/OR contacts through the heat coil when the coil is turned off.
So first, check that the coil has resistance.
Unplug the unit and both wires to the coil.
Check it with a meter, should be around 8 to 12 ohms.
Then check from each side of the coil to the case/frame, both should be infinite ohms (open). If not the coil may have sagged or broken and is touching the case. This can cause it to be on all the time.

If the heating coil is OK, set the timer to mid-scale auto mode and check that the TM/OR contacts are closed..

If you do not own a meter, I would suggest you purchase a one. You can get a decent digital multimeter for under $20.00. You do not need fancy though it is nice if the leads are a couple feet long.
If it saves ordering one unnecessary part it has paid for itself and you end up owning a useful tool.
Most places will not let you return electrical parts so if you order it, you own it.
A couple things to watch when measuring ohms and continuity
1. Always remove power from the machine otherwise you could blow your meter.
2. Always disconnect at least one side of any device you are checking. This eliminates the possibility of measuring an alternate/parallel circuit path.
3. When checking for closed contacts and continuity use the lowest scale (Usually 200 ohms). Then try higher scales. This scale is 0 to 200 ohms so if the device you are measuring is 300 ohms this scale would show an open circuit which it is not, you are just measuring outside the scale's dynamic range.
4. When you start always short the meter leads together. This will tell you that the meter is working and if there is any 0 offset.

There is a good STICKY at the start of this forum about it's use.