Samsung DV42H5200GW/A3 takes hours to dry

Long time lurker, first time poster.

Just moved into a new house with a gas DV42H5200GW/A3 that gets warm, but not hot. Takes hours to get completely dry, no matter the load size. It is currently in pieces on the laundry room floor and assured my wife I’d have it fixed by tomorrow…

Bought a dryer cleaning kit and ran it through the length of the pipe, mostly clean. Then I foolishly assumed it was a bad thermistor and the new one and old one are both reading about 10.5k at room temp.

I’ve checked for continuity on the thermal fuse (component right next to thermistor) and the thermostat I believe (component on the heating tube). Both read 0. I think that’s good? Thermal fuse sounds like it has a rattle to it, but I would imagine it wouldn’t read 0 if it was actually broken.

There was a lot of lint inside the dryer, not sure where it would come from so I don’t know if that could cause a fault in a sensor or something.

Any guidance on what to do next?

Edit: no codes are showing. I also have been using the timed dry option at the hottest option at 1hr 45mins to start, so I don’t think it’s the moisture sensors doing interfering.

How long does the burner stay on? I’m just guessing at this point, but I’ll bet it lights the first time, runs for a little while, then shuts down the flame and then it stays out for quite awhile. I’m not real familiar with the samsung brand, but the diagram shows the gas valve and I’m pretty sure I’m familiar with it. They can develop a crack in the coil winding. They work when they are cold and then the coil loses continuity when it warms up. I think a standard coil kit would fix it. Part 2-3 is the whole valve assembly.

https://www.appliancepartspros.com/duct-burner-parts-for-samsung-dv42h5200gw-a3-0000.html

This coil kit might be just the thing…

https://www.appliancepartspros.com/whirlpool-coil-kit-for-279834-ap3094251.html

[quote=ThatGuy;919757]How long does the burner stay on? I’m just guessing at this point, but I’ll bet it lights the first time, runs for a little while, then shuts down the flame and then it stays out for quite awhile. I’m not real familiar with the samsung brand, but the diagram shows the gas valve and I’m pretty sure I’m familiar with it. They can develop a crack in the coil winding. They work when they are cold and then the coil loses continuity when it warms up. I think a standard coil kit would fix it. Part 2-3 is the whole valve assembly.

https://www.appliancepartspros.com/duct-burner-parts-for-samsung-dv42h5200gw-a3-0000.html

This coil kit might be just the thing…

https://www.appliancepartspros.com/whirlpool-coil-kit-for-279834-ap3094251.html[/quote]

Interesting. Is there a way to check the coil beforehand?

Since there were no follow ups to this thread, I did some additional research and then ordered the coil kit. It worked perfectly. Thanks ThatGuy!

I have a Samsung DV45K6500GW/A3. The gas valve assembly is the DC62-00201B / AP5966616, Parts for Samsung DV42H5200GW/A3-0000: Duct & Burner Parts - AppliancePartsPros.com, which is the White-Rodgers 25M05A-129. According to the Spec sheet at https://www.rogerssupply.com/Attachment/White-Rodgers_25M01A-100_Guide.pdf the “A” indicates the solenoids which is 120 volt, 60 Hz which is standard US AC power. Since there were no other 120v/60Hz, I presumed all the solenoids were the same. I ordered the Maytag universal 279834 / AP3094251 Whirlpool 279834 Dryer Gas Valve Coil Kit (AP3094251) - AppliancePartsPros.com, gas valve coil kits like ThatGuy suggested. Once received I checked the ohm measurements on them vs my current ones (issue was intermittent failures due to heat) and the Maytag ones measured the same as my Samsung. This $17 replacement fixed my issue rather than having to spend $200-$300 on the complete gas valve assembly.