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

FAQs | Repair Videos | Academy | Newsletter | 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.

Appliance Repair Tech Tips

  • entries
    165
  • comments
    475
  • views
    24,229

What is LG's FlowSense and How Does It Work in Gas Dryers?


Son of Samurai

1,174 views

Take a look at this LG gas dryer schematic, paying special attention to the circuit with the flame detector.

Screenshot 2021-03-17 155725.png

If you trace it out, it becomes a bit puzzling what that circuit is actually doing. The hi-limit thermostat, the safety thermostat, and the flame detector don’t appear to have any direct effect on the gas valve coils as you would find in other dryers. So what purpose do they serve? 

This markup makes it all clear.

Kenmore_796_91582410_Gas_Dryer_Wiring_Diagram_FlowSense_MFL62119984.jpeg

 

Unlike many circuits that use controls like the hi-limit or the flame sensor in series with other gas valve coils, these components are used in sensing lines connected to the control board. You can learn more about identifying sensing lines in this post.

The control then uses these sensing lines to make algorithmic decisions about when to energize the valve coils. In other words, the control board is in complete control of when those coils get energized at all times.

This is in stark contrast to the "usual" way of controlling the gas valve through a split-coil configuration, which operates completely independently of any electronic controls. Here's a different schematic that uses the old-skool valve configuration for contrast.

Screenshot 2021-03-20 114218.png

Want to learn more about the intricacies of gas dryer ignition systems and how to troubleshoot them? Click below to watch a webinar recording all about that -- only available to premium tech members.

Screenshot 2021-03-17 163657.png

  • Like 1

4 Comments


Recommended Comments

Figgs827

Posted

Looks like I sparked a discussion

Link to comment
  • Team Samurai
Samurai Appliance Repair Man

Posted

On 3/24/2021 at 6:49 PM, Figgs827 said:

Looks like I sparked a discussion

That's how it rolls at Appliantology. We get topic ideas for blog posts and webinars from the kinds of things we see techs posting. In several of my webinars, you'll hear me explicitly refer to a topic in Appliantology. What better way to ensure that we're talking about things our audience is interested in? Keeps it fresh and relevant. So keep on posting questions! 👍

  • Like 3
Link to comment
  • Team Samurai
Samurai Appliance Repair Man

Posted

Come to the encore presentation of the LG FlowSense workshop today at 5 PM Eastern Time. 

 

Link to comment
  • Team Samurai
Samurai Appliance Repair Man

Posted

The recording for this webinar is posted here:

 

Link to comment
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.