New flame sensor failure?

This dryer ran with no heat and no ignitor glow when I received it. The flame sensor showed no continuity, so I replaced it and the dryer ran perfectly for only a week.

Now the ignitor warms up and glows continuously for as long as I let the dryer run, but the gas valve never opens. The new flame sensor still shows continuity, but I’m guessing that doesn’t guarantee it’s working properly. Is there anything other than the flame sensor that can cause this?

The flame sensor is actually a temperature switch which senses the igniter temperature and switches the power from the igniter to the gas valve coils to open the gas to the burner. According to your description the flame sensor you installed does not work properly. You have to talk to people who sold it to you and they have to exchange it under the part warranty.

Gene.

Thanks for the reply.

The flame sensor is actually from appliancepartspros, but I’m having doubts now about it being an issue, because I get the exact same behavior if I pull a wire off and leave it completely open. The ignitor still glows nonstop.

The wiring diagram for the dryer shows the flame sensor and two valve coils connected in parallel, and the main coil is reading zero resistance when I test it. If that coil is toast, is it possible that it’s bypassing everything else?

If the coil is shorted then this is the culprit. No doubt about it.

Gene.

Just to confirm it, the ignitor does turn off at the correct time when I run it with the main coil disconnected. I’ll be sure to update when the replacement is in.

Update - back up and running with a new main coil. Thanks again for the help.

Here are your parts includes a wiring diagram
http://www.appliancepartspros.com/partsearch/modelsearch.aspx?model=MSD2554ARW

Here is a manual
[http://www.applianceaid.com/frig.html](http://www.servicematters.com/maytag_library/docs/16010154.pdf"]http://www.servicematters.com/maytag_library/docs/16010154.pdf[/URL]

Only way to tell if freezer is OK is with a thermometer. It should be around 0 degrees F. Also ice cream is a good indicator if the freezer temperature is high as it will be soft.

First check that the compressor and condenser fan are running.
If yes
Check that the evaporator fan in the freezer is also running. It is required to push cold air into the fresh food side
If yes
Check that the damper (Item 8 in Section 2) between the freezer and fridge is open allowing the cold air in.
If yes
Remove the evaporator coil cover in the freezer so you can inspect them.
If they are heavily frosted/iced over you have a defrost problem.
If there is just frost in one area or it is very blotchy you may have a low freon problem.

Here are a couple good sits with basic fridge repair info.
[URL="http://www.applianceaid.com/frig.html)
http://www.acmehowto.com/howto/appliance/refrigerator/refrigerator.php