Whirlpool Gas Dryer WGD5900SOW heats but flame eventually goes out and clothes are not dryingy

[wrldzfstst]

It looks like when started everything works fine, gas ignites and dryer gets warm, however eventually (10 minutes or so) the burner shuts off and doesn't come back on.  I was just wondering what parts to test, I replaced the thermal fuse 3 years ago or so.  Thanks.

[evaappliance]

Gas valve coils, will test good when cold but will drop out after warming up

[Lighthouse]

Is the vent clean? Does it do this with the vent hose disconnected?

[Joney]

I second coils... Though I would check the vent and make sure clear as a plugged vent can surely cause this...

[wrldzfstst]

Thank you, will check those

[darren412]

Look at the front  panel at the bottom left corner. There will be a little white square that you can pop off the front panel to observe the gas burner igniting. After 7 to 10  minutrs start observing the gas burner burner through that observation hole and see if the igniter glows on and off again when it wants to cycle and turn the gas flow on for drying purposes.  When it’s properly running the igniter will glow red and then after that the gas flow should be introduced in to the burner tube for ignition. You will hear several clicks also during the process.  The tip to a bad set of coils can be that you don’t hear any clicking sounds at all during the cycle process. If it does not ignite at this point as it did before and the igniter just keeps glowing then shutting off again and again when you first started the drying cycle process , then most likely you may have a bad set of gas valve coils that are weak. It can be your timer acting up but from your symptoms it sounds like it will be the coils as Evaappliance had mentioned. 

[wrldzfstst]

Thanks to all for the advice, I replaced the solenoid coils and first load just finished, all seems good!  So hopefully it will stay good, thanks again for all of the knowledge.  The old coils tested fine so I guess there is a limit to testing,.

[Lighthouse]

Thanks. Glad you got it going.

[LearningTech]

Its always the coils...

[darren412]

On 6/19/2018 at 6:05 PM, wrldzfstst said:

Thanks to all for the advice, I replaced the solenoid coils and first load just finished, all seems good!  So hopefully it will stay good, thanks again for all of the knowledge.  The old coils tested fine so I guess there is a limit to testing,.

Great job glad it’s up and drying for you again