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Dryer question

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thendrix View Drop Down
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    Posted: 17 Jan 2020 at 6:56am
My grandmother has a Maytag gas dryer that's about 30 years old and it's having trouble heating. The ignitor will come on and the flame sensor turns the ignitor off like it should then the gas comes on and it lites. After 10 to 20 seconds the burner goes out and it won't relight. I replaced the gas valve coils but no help. I want to fix this dryer if possible because 1) it's better than anything you can buy new and 2) my grandmother is 81 years old and I don't want her to have to buy a new dryer when there's no telling how long she'll need it. Little morbid but truth is truth. Any suggestion? The lint trap is clean and I'm almost sure the vent is open and working like it should
If you raise your kids you can spoil your grandkids. If you spoil your kids you will raise your grandkids.

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im4racin View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote im4racin Quote  Post ReplyReply Direct Link To This Post Posted: 17 Jan 2020 at 7:07am
Try cleaning the flame sensor or replace it. The igniter is on a timer not flame sense. The controller doesn't see flame so turns off gas.
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thendrix View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote thendrix Quote  Post ReplyReply Direct Link To This Post Posted: 17 Jan 2020 at 7:36am
I'll check that next. That was my original thought because that's how the furnaces that used to be used in chicken houses work but I found somewhere on the internet it said different. That's what I get for listening to the internet.
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jaybmiller View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jaybmiller Quote  Post ReplyReply Direct Link To This Post Posted: 17 Jan 2020 at 7:57am
yeah 30 year old tech is good stuff... new stuff, not so good....
I 2nd the 'flame sensor'. Probably 'old school'  and 30 years worth of soot finally 'hid' theh flame from the sensor.
hope you have good luck !
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ray54 Quote  Post ReplyReply Direct Link To This Post Posted: 17 Jan 2020 at 12:10pm
May not a apply,but if propane it could be the regulater going bad. When not using heater just the water heater had this. The copper pigtail was flacking off and plugging regulater. Replace the copper pigtail from tank and all was well again.
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thendrix View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote thendrix Quote  Post ReplyReply Direct Link To This Post Posted: 17 Jan 2020 at 5:48pm
The only reason I'm not thinking regulator is the heat and the water heater both work fine. If a flame sensor can't fix it then I'll look further into the gas lines
If you raise your kids you can spoil your grandkids. If you spoil your kids you will raise your grandkids.

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shameless dude View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote shameless dude Quote  Post ReplyReply Direct Link To This Post Posted: 18 Jan 2020 at 12:25am
I think if the thermal coupler is bad, it wouldn't light at all.
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Dusty MI View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dusty MI Quote  Post ReplyReply Direct Link To This Post Posted: 18 Jan 2020 at 11:33am
Originally posted by shameless dude shameless dude wrote:

I think if the thermal coupler is bad, it wouldn't light at all.

A bad thermal couple will let it light but not stay light.

Dusty
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thendrix View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote thendrix Quote  Post ReplyReply Direct Link To This Post Posted: 18 Jan 2020 at 8:04pm
Who'd a thunk it?? The vent pipe came off. Put it back on, dried a load of clothes like it always has.
If you raise your kids you can spoil your grandkids. If you spoil your kids you will raise your grandkids.

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Post Options Post Options   Thanks (0) Thanks(0)   Quote chaskaduo Quote  Post ReplyReply Direct Link To This Post Posted: 19 Jan 2020 at 12:29am
There's one for the memory bank. Now what was it we was talking about?
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Ted J View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ted J Quote  Post ReplyReply Direct Link To This Post Posted: 19 Jan 2020 at 2:54am
Something to do with a Ferd pickup,,,,,,,,,,,I think.
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jaybmiller View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jaybmiller Quote  Post ReplyReply Direct Link To This Post Posted: 19 Jan 2020 at 5:25am
well THAT'S a new one for me !!
maybe there's some kind of 'draft' sensor ?

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thendrix View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote thendrix Quote  Post ReplyReply Direct Link To This Post Posted: 19 Jan 2020 at 7:10am
No idea about the sensor but a happy Nana means a pot of vegetable soup
If you raise your kids you can spoil your grandkids. If you spoil your kids you will raise your grandkids.

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chaskaduo View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote chaskaduo Quote  Post ReplyReply Direct Link To This Post Posted: 19 Jan 2020 at 7:19am
Vegetable soup with lots of love. Thumbs Up
1938 B, 79 Dynamark 11/36 6spd, 95 Weed-Eater 16hp, 2010 Bolens 14hp
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thendrix View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote thendrix Quote  Post ReplyReply Direct Link To This Post Posted: 19 Jan 2020 at 12:18pm
Just finished. Man that woman can make some veggie soup
If you raise your kids you can spoil your grandkids. If you spoil your kids you will raise your grandkids.

Paitience is a bitter cup from which only the strong can drink
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Hubert (Ga)engine7 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Hubert (Ga)engine7 Quote  Post ReplyReply Direct Link To This Post Posted: 19 Jan 2020 at 12:33pm
Bet that soup is the best around. Mom had "the touch" and even using the same recipe my wife or I neither one can even come close. With this cool weather just around the corner I hope she made you enough to last a day or two. Glad you got the dryer fixed, don't you love it when it is something simple and takes you forever to find it.
Just an old country boy saved by the grace of God.
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thendrix View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote thendrix Quote  Post ReplyReply Direct Link To This Post Posted: 19 Jan 2020 at 6:16pm
Hehe. Yeah I hate it when it takes forever but when it happens that way all the time you get used to it
If you raise your kids you can spoil your grandkids. If you spoil your kids you will raise your grandkids.

Paitience is a bitter cup from which only the strong can drink
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DaveKamp Quote  Post ReplyReply Direct Link To This Post Posted: 22 Jan 2020 at 7:30am
If the gas dryer is 30 years old, it doesn't suffer from an excess of 'safety brains'... all the protection is basically inside the gas valve... which is essentially the same valving that's used in a furnace, or a hot water heater.

Most likely, the reason the flame went out with the exhaust vent removed, was a rapid decline in the amount of available oxygen... the flame was suffocated... by exhaust... which means you're lucky... could'a been tragic.

If it uses a hot-surface ignitor, the ignitor current flows through a detection solenoid in the valve... if there's insufficient current through that HSI, the gas valve will drop out after about ten seconds.

It has a thermocouple flame sensor of some sort... typically, they're same scenario as an HSI... presence of flame provides a MILLIVOLT, low current signal strong enough to hold in a tiny solenoid in the valve.  no flame, no hold magnet, it will NOT flow fuel without it.

Note that valves will LIGHT without those sensors being satisfied... because there's a 'start circuit' in the valve that can be triggered for a few seconds in order to get ignition, but after a few, that circuit will release, and the flame will go out, unless the safeties have determined that a flame has been attained.
Ten Amendments, Ten Commandments, and one Golden Rule solve most every problem. Citrus hand-cleaner with Pumice does the rest.
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