417.90042990 Dryer runs only with start switch on

NateMI

Premium Member
Joined
Apr 26, 2019
Messages
2
Location
MI
Model Number
417.90042990
Brand
Sears Kenmore
Age
More than 10 years
Recently, my dryer will quit as soon as I release the start switch. I'm wondering if anyone could give me any ideas about what could be the cause? Or at least where to start looking? In Googling, I've found a number of similar issues (like this post on this forum), but nothing that looks like it applies to my dryer.

It's an older model (417.90042990), but I'd like to fix it if it's possible. Any help would be appreciated.
 

Jake

Appliance Tech - Admin
Staff member
Joined
Aug 24, 2004
Messages
101,457
Location
McMullen Valley, Arizona
Hi Nate,

In Googling, I've found a number of similar issues (like this post on this forum), but nothing that looks like it applies to my dryer.
Correct, that relay is for a Kenmore 110 made by Whirlpool.

Your Kenmore 417 model is made by Frigidaire and does not have or use that relay.:)

It sounds like the motor switch is shot, seen this many times. Which would require a new motor, as the motor switch is not a separate part you can purchase.

The motor uses a centrifugal motor switch to go from the start windings to the run windings. The motor works like this:

The common power supply (L1) connection at the motor for both start and run windings is M4 on the motor switch. The neutral (N) side of the run windings is M6 The contacts in the motor switch are open between M6 and the run windings. The neutral wire on M6 comes through the door switch and also connects to one side of the PTS(Push To Start) switch. If the door switch is good you should have continuity between the center/white power cord connection and one side of the PTS switch and M6 on the motor switch.

M5 is also the neutral side of the start and run windings and the wire comes from the other side of the PTS(Push To Start) switch. The contacts in the motor switch are closed between M5 and the start windings and run windings. When you push the PTS switch, there's a complete circuit and both the start windings and run windings are energized. Once the motor reaches 70% of its operating speed the centrifugal switch closes the contacts between M6 and the run windings and when you release the PTS switch the neutral circuit is broken to the start windings.

The first thing you should check is the door switch. You may not be getting a good internal contact connection within the door switch, and it would need to be replaced.

Here's the door switch for your model:
Door Switch 134813601


Unplug the dryer and ohm test the door switch first: http://www.anrdoezrs.net/links/8373913/type/dlg/https://www.repairclinic.com/Video/Video-Landing/1306-/Dryer-Not-Starting-Three-Terminal-Switch-Testing-Repair

This video shows you how to access/replace the door switch: https://click.linksynergy.com/deeplink?id=YO6223WzStY&mid=13810&murl=https%3A%2F%2Fwww.appliancepartspros.com%2Ffrigidaire-switch-134813601-ap4316048.html

Here's the motor for your model:
Drive Motor 131560100


There is a video in the motor part link that shows you how to replace the motor.

Let us know what you find.

Jake
 

NateMI

Premium Member
Joined
Apr 26, 2019
Messages
2
Location
MI
I've already tested the door switch and it was good, so it must be the motor switch, unfortunately. Thanks for the advice. I really appreciate it.
 

Jake

Appliance Tech - Admin
Staff member
Joined
Aug 24, 2004
Messages
101,457
Location
McMullen Valley, Arizona
Yes Nate, then its a bad motor switch.

Glad to help.:)

Thanks for the update!

Jake
 
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