Learn Circuit Fu, the ancient lost art of appliance repair…

Click here to check out our structured, online appliance repair training courses for rookies and experienced techs.

FAQs | Repair Videos | Academy | Newsletter | Podcast | Contact

Stay connected with us...

Subscribe to our YouTube channel for lots of appliance repair tips and help! Subscribe to our MST Radio podcast to learn secrets of the trade. Sign up for our free newsletter and keep up with all things Appliantology.
  • Announcements

    • Samurai Appliance Repair Man

      Webinar Recordings Index Page   11/07/2017

      On-demand appliance repair training videos for Professional Appliantologist members Over 30 hours (and growing!) of original, high quality appliance training webinars developed and given by yours truly are at your fingertips, on topics you won't find anywhere else. Fill in those knowledge gaps, strengthen those areas of uncertainty, and boost your skills. Watch on mobile or desktop at your convenience whenever, wherever.  Ultra Short Primer on Basic Electricity, Circuits, Ohm's Law, and Schematic Reading (Length: 1:04:48) Basic Refrigerator Troubleshooting (Length: 1:10:45) Schematic Reading Workshop, 10/2015 (Length 1:19:08) Troubleshooting Strategies for Computer-Controlled Appliances (Length: 48:34) Semiconductors and PN Junctions (Length: 1:04:37) Appliance Temperature Sensing Devices & Technology (Length: 1:27:33) Voltage Measurements, Meters, Ghost Voltages, and Triac-controlled Neutrals (Length: 1:29:32) Troubleshooting with Tech Sheets, Part 1, 4/2016 (Length: 1:09:26) Troubleshooting with Tech Sheets, Part 2, 4/2016 (Length: 1:21:11) Tech Sheet Review, 4/9/2016: Bosch Speed Cooker, Amana Refrigerator, GE Glass Cooktop Range (Length: 1:22:58) Pulse Width Modulated (PWM) Switches used in Samsung Switched Mode Power Supplies (SMPS) (Length: 27:07) PWM Computer Cooling Fan in a Whirlpool Refrigerator (Length: 14:53) Understanding AC Split-phase Household Power Supplies (Length: 52:41) Troubleshooting a Samsung Electric Dryer without Disassembly using Live Tests and the Schematic (Length: 22:47) Troubleshooting a Bosch Dishwasher No-Heat Problem using the Schematic and Live Tests (Length: 15:38) Linear Motors and Linear Compressors (Length: 55:54) Bi-directional PSC Drive Motor Systems in Whirlpool VM Washers (Length: 56:52) Appliance Service Call Structure and Troubleshooting Strategies (Length: 1:00:16) The Ten Step Troubleshooting Tango and Workshop Exercises (Length: 1:35:39) Troubleshooting Ten-Step Tango Advanced Workshop (Length: 1:32:06) Ten-Step Tango Troubleshooting Workshop: Refrigerators (Length: 1:35:57) Whirlpool Duet Washer Schematic Analysis & Whirlpool Dryer Moisture Sensor System (Length: 1:03:04) Neutral Vs. Ground, Inverter Microwave, Digital Communications, Loading Down in DC loads, and more! (Length: 1:14:45) Gas Oven Service Call After a Parts Changing Monkey (Length: 36:04) AFCI and GFCI Circuit Protection Technology (Length: 41:26) Troubleshooting Samsung Refrigerators and more (Length: 1:29:58) 3-way Valves and Dual Evaporator Refrigerators (Length: 1:15:45) Split-Phase Compressors and PTC Start Devices (Length: 1:11:57) Gas Dryer Ignition Systems (Length: 53:50) Refrigerator Sealed System Thermodynamics, Part 1 (Length: 43:07) Refrigerator Sealed System Thermodynamics, Part 2 (Length: 1:09:09) Refrigerator Sealed System Thermodynamics, Part 3 (Length: 1:11:56) Refrigerator Sealed System Thermodynamics, Part 4 (Length: 37:45) Refrigerator Sealed System Thermodynamics, Part 5 (Length: 16:35) To access these webinars and all the other info-goodies here at Appliantology, become a Professional Appliantologist today. If you need cost-effective, time-flexible, state-of-the-art appliance technical training, check out the Master Samurai Tech Academy.
    • Son of Samurai

      [Webinar] Appliantology Peer Group   02/08/2018

        We're doing something totally new this time! In this first ever meeting of the Appliantology Peer Group, we'll be hosting a roundtable-style question and answer webinar. Bring something you'd like to share with your brethren in the craft: it could be photos, a tech tip, new insights gleaned from recent training -- anything having to do with the business or technical sides of the appliance repair trade. If you've got something to show, we'll let you share your screen and give you the opportunity to teach us all something new. And of course, Team Samurai will be there to answer any questions you might have about how to use Appliantology.  
Gill Gawthrop

Samsung DV40J3000EW/A2 stops mid normal cycle

Recommended Posts

Gill Gawthrop

Couple year old dryer stops early in normal cycle and blows thermal fuse. I have cleared the exhaust vent which is 16ft of hardpipe with one 90 degree elboe. I have replaced the flex exhaust line. I have taken apart the blower housing and it is clean. I have replaced the heat coil, thermal fuse and high limit. It heats a couple loads on timed dry and then thermal fuse blows. Laundry is piling up and wife not happy.

Share this post


Link to post
Share on other sites

Need appliance parts? Call 877-803-7957 now!

KaveMan

Gill, did you check the exhaust vent flapper on the outside of the house to make sure it's not stuck shut?

Share this post


Link to post
Share on other sites
johntech

If the spade connectors are not real tight on the thermal fuse it will generate heat and blow the fuse. They should not pull off easily by hand. Until you have the problem solved I would disconnect the duct to take it out of the equation entirely. Did you test the thermistor? That is the temp sensor on this model. I do not see a lot of them go bad but I do see them get covered with lint which insulates it and causes over heating conditions. Could also be a relay sticking on the main control. Run a no heat cycle and make sure it does not heat. Part number: DC32-00007A

Part number: DC32-00007A

Google samsung dryer thermistor and you will find a video on how to test it.

  • Like 1

Share this post


Link to post
Share on other sites
Gill Gawthrop
4 hours ago, KaveMan said:

Gill, did you check the exhaust vent flapper on the outside of the house to make sure it's not stuck shut?

I cleaned the exhaust duct from the inside and outside. I am confident it is wide open. Is there a point in the dryer between the blower and the appliance exhaust exit that can be clogged?

Share this post


Link to post
Share on other sites
applianceman97

Are you replacing these parts with factory OEM replacements? 

Share this post


Link to post
Share on other sites
darren412

Make sure the lint filter  screen is not so dirty that if you put it up to a light that you cant see through the filter screen.  The filter screen housing needs to be  totally clean inside also.You may also want to make sure the blower wheel is not stripped and may be slipping on the motor shaft.  Just a few things you may want to check if you missed them.

Share this post


Link to post
Share on other sites
Gill Gawthrop

I tested the thermister and got 10.4 on 20k ohms setting. All good. High temp has continuity, (3rd) thermostat has no continuity. Blower is well connected to shaft. Lint screen looks clear to me. I can see right through it. I guess I will replace the thermostat, again, and test on a no heat cycle as suggested by Kaveman.

Share this post


Link to post
Share on other sites
Gill Gawthrop

Applianceman97 the heat element came from this site and the others are by ERP, Exact Replacement Parts.

Share this post


Link to post
Share on other sites
Gill Gawthrop

I ran on air fluff manuel setting. The only no heat mode i could come up with. It did not heat.

Share this post


Link to post
Share on other sites
applianceman97
41 minutes ago, Gill Gawthrop said:

I ran on air fluff manuel setting. The only no heat mode i could come up with. It did not heat.

I am confused about this statement. It says you ran it on a no heat mode and it did not heat. I don't think that is what you meant to say.

Why were you testing it on a no heat cycle?

Share this post


Link to post
Share on other sites
Gill Gawthrop

Johntech above recommended "Could also be a relay sticking on the main control. Run a no heat cycle and make sure it does not heat."

Share this post


Link to post
Share on other sites
Gill Gawthrop

Perhaps I misunderstood Johntech.

Share this post


Link to post
Share on other sites
16345Ed
1 hour ago, Gill Gawthrop said:

Perhaps I misunderstood Johntech.

If you run no heat cycle and it heats, either relay stuck closed or heating element shorted. 

Share this post


Link to post
Share on other sites
applianceman97

What he is saying is that he did run an air fluff cycle and it did not heat. Therefor the relay is not stuck.

Share this post


Link to post
Share on other sites
darren412

Has it just blown 1 Fuse  or several fuses ?   Just wondering if you may have had a bad new fuse or like Applianceman97 had mentioned are they after market fuses that you are using that may be faulty and blowing to soon.   something to think about also

Share this post


Link to post
Share on other sites
16345Ed
7 hours ago, applianceman97 said:

What he is saying is that he did run an air fluff cycle and it did not heat. Therefor the relay is not stuck.

Yes, I was trying to explain to Gill why John had him test air fluff. 

Share this post


Link to post
Share on other sites
Lighthouse
17 hours ago, Gill Gawthrop said:

Lint screen looks clear to me. I can see right through it.

How well does water flow through it? I have had some dryers that fail a flow test with a meter and screen "looks clear" but after washing them with hot soap and water they pass the flow test.

  • Like 1

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now