Product review (5 stars): Works as expected
My Kenmore gas dryer would initially fire up the gas burner, but once the coils on the gas valve got hot the burner would fail to ignite again until the coils cooled down.  This would make for extremely long dry cycles.  You could see the gas igniter glowing red hot through the little removable plastic window on the lower left front of the dryer but the burner would not fire up.  This indicated everything was working except for the gas valve opening to supply gas.  From this point the problem could have been either the sensor that detects the gas igniter is hot to supply power to the gas valve or the gas valve itself.  From reading on the web I found out that if the gas eventually does come on when the dryer has cooled down then it is most likely these coils that are bad.  When they get hot and they are worn out they no longer produce a strong enough magnetic field to operate the gas valve.  Once they cool down they do produce a magnetic field sufficient to open the valve.  So I was 99.9% sure these little guys were the problem when I ordered them.  Once I replaced them the dryer worked just like new.

Replacing them only took 30 minutes.  I say this because I took the time to thoroughly vacuum the inside of the dryer while I had it open.  I have had a gas dryer ignite lint inside once before in my life so I like to open them up every couple of years and vacuum all the lint up.  Opening the dryer is really easy.  Just look for a video on You Tube like I did to see how to do it.  And just think you are probably going to save yourself $100 for a service call from an appliance repair man.  That is pretty much the going rate in the Philadelphia suburbs to have somebody come to your house.  And usually that gives you 30 minutes of free labor which starts when they leave the previous job so chances are the bill will be even higher.