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-   -   Spark from back of Gas Dryer (http://www.diychatroom.com/f18/spark-back-gas-dryer-164555/)

Regatah 11-24-2012 03:41 PM

Spark from back of Gas Dryer
 
When I turn the my gas dryer on, I observe a spark coming from the rear of the dryer. This doesn't happen every time but often enough where it is a concern. I happened to be watching one time and the spark occurs right at the point where my flexible dryer vent connects to the wall. I had a technician out to check the dryer and he couldn't find anything, no indication internally of any electrical problems. I have to think it has something to do with the dryer though. The washer is hooked up to the same outlet but I never see any sparking when I turn that on. I replaced the outlet but that didn't solve the problem either. I checked the service panel and everything seems to be in order there also. This particular outlet is on its own circuit, there are no other outlets, lights, etc, that share this circuit. Does the dryer have its own ground wire or ground strap? Could this be the problem if it somehow got loose? Thanks.

user1007 11-24-2012 04:07 PM

Sparks and gas are not a good combination so I would pursue this. Something might be arcing when the motor comes on?

joecaption 11-24-2012 04:10 PM

Whats the hose made of?
Has anyone used an outlet tester to check to see if it's hooked up correctly and grounded?

funfool 11-24-2012 04:34 PM

Not trying to create a conspiracy theory here.
Unusual or rare issue ... I blame the aliens!

Is it possible that a small gas leak is there.
Turning on the dryer the electrical connections are setting off a minor gas explosion that is being described as a spark?

Not sure if that theory is possible, if it was leaking and set off, would just continue to burn from gas supplied from leak.
Seems it might be possible, happens rarely and service repair guy could not find it ... let it sit long enough and kaboom goes the spark?

If need be, buy a new dryer, do not die in a flaming house fire over a broken dryer.

Regatah 11-24-2012 08:55 PM

I thought about the gas leak, but it's definitely just a spark. I think there would be flames if it were a gas leak. Like I said, I saw a spark at just the point where the flexible exhaust connects to the wall. There is a scorch mark on the metal where I see it arc.

Regatah 11-24-2012 08:57 PM

Quote:

Originally Posted by sdsester (Post 1059324)
Sparks and gas are not a good combination so I would pursue this. Something might be arcing when the motor comes on?

As I mentioned, I replaced the outlet, making sure it was hooked up right and grounded.

funfool 11-24-2012 09:17 PM

This is what bugs me.

"I had a technician out to check the dryer and he couldn't find anything,"

You say is obvious burn marks on the vent.
This can be a serious issue if a gas leak ever did occur.
I am not qualified to give you correct answer, in this case do not want to give bad advice either.

In this situation, I doubt a forum moderator will move your post, but I would suggest re-asking question in the electrical section of diy, and not appliance section.
I think with your issue, would be better answered there.

Gary in WA 11-25-2012 01:03 AM

Good suggestion, moved to "Electrical" for more varied answers...

Gary

AllanJ 11-25-2012 08:15 AM

Start by measuring voltage between the dryer vent (at the wall) and ground with the dryer off. Jiggle the vent pipe. Repeat with the dryer on.

Unhook the dryer vent hose from the wall ventl and turn on the dryer. Do you see sparks anywhere else?

Measure voltage between the vent pipe on the wall (nothing attached to it) and ground. (To see if it is the vent pipe and not the dryer that is live causing the spark)

Also, (with the vent hose still disconnected) unplug the dryer and measure resistance between the ground pin of the plug and the other pins. (To check for a ground fault in the dryer)

Regatah 11-26-2012 08:27 PM

Will do, Alanj. Make take a day or 2 but will let you know.

Thanks.

fa_f3_20 11-30-2012 10:48 PM

My guess is that the dryer is not grounded properly, and it uses a high-voltage spark igniter. The spark you're seeing is the voltage from the igniter seeking a path to ground.

kbsparky 12-01-2012 04:40 AM

Or you may be observing a static discharge.

danpik 12-01-2012 09:29 AM

Quote:

Originally Posted by Regatah (Post 1059304)
I happened to be watching one time and the spark occurs right at the point where my flexible dryer vent connects to the wall.

Can you explain this a little better? The wall connection, is it metal? Is it grounded? Is the flex duct metal? Sounds like a bad neutral connection in the dryer


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