Maytag dg309 clothes dryer: the flame comes on, then goes off after a couple of minutes. Igniter then tries to reignite flame. Vent is clear of obstructions. Thanks.

Hello,
Your have one of two problem causing the gas to not come on on your dryer.
1) the flame sensor is bad...if the igniter comes on and stays on and doesn't go off...usually within 1 minute the flame sensor isn't working as its supposed to
2) the coils on the gas valve could be the problem...if the igniter does indeed go off within 1 minutes and as soon as the igniter goes off if their is no flame the coils on the gas valve is what would need to be replaced
here is what each part looks like
FLAME SENSOR

Hello,

Yes it is the igniter its weak and can not stay within normal range to stay on allowing the flame to stay on.

The part number for that igniter is 74007498 it can be purchased at your local appliance parts store on online at
searspartsdirect.com
repairclinic.com
apwagner.com
apdepot.com
partselect.com

GENE

Hello,

Depending on your brand and model down on the bottom of the front panel is a piece you can take off and look in and see the burner asm. If at first you see the glow of the igniter, followed by a flame then once the flame cuts off a few minutes later the igniter glows but no flame, the coils that open the gas valve wont open to allow gas flow when they are warm, and need to be replaced.

Gene

Sounds like a bad thermocouple. This part sends a millivolt signal to keep the gas valve open but shuts it off when it cools - or if something goes wrong with the ignighter - to prevent fires. It's easy to replace and not super expensive. See your local Rheem dealer.

run dryer for 10 minutes then remove vent hose see if start working mean flame on for while, if it is then you need to clean your vent system.

this sounds like a clogged vent more than a thermostat. go outside with the dryer running and see if hot air is blowing out the vent. if not check outside vent for birds nest etc, inside make sure the vent is straight any dips in vent could cause water to build up clogging the vent. try this first if it doesn't work write back

ck/replace the 2 black coils on valve they will sometimes fail after 1st start up slight chance it may be flame sensor mounted on side of burner to ck remove the 2 wires and short together temporaily if flame stays on and reignites ckd vent system first bad flame may cause sensor to shut it off if flame/vent ok replace sensor

if burner lights but fails to relight after several shut offs suspect burners solenoids change both they come in a kit ..once the solenoids get hot they will sometimes open electrically and fail to reenergize after cool down they will open gas valve and alow burner to reignite..also be sure vent to outside to clean and vent behind dryer is not flattened or kinked has know flame to not be properly burning due to exhaust problems and flame sensor would shut burner down

be sure vent is clear all the way to outside try a load with vent disconnected ..also if gas dryer may be a problem with burner reigniting after heat up if so try replaceing both coils on burner valve

make sure that your vent is not plug up can you go outside your house and feel good air coming out the vent when the dryer is turn on if so the only other things it could be is the coils that sit on the ignotor assmebly or the high limit termistat is not working properly the coils are little black circle coils that sit in the ignitor assmly should have a metal braket across the top of them holding them in you can check resistance on these coils if you have an meter