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eric17

01:01PM | 04/18/07
Member Since: 04/17/07
4 lifetime posts
Bvelectrical
My gas dryer suddenly stopped heating. I have done some reading on this site and has given me some direction, thanks. I have taken apart the dryer to access the burner. The igniter does not glow. Voltage to it is 27V. It has continuity. I've accessed the thermal fuse, it has continuity too.

Is the igniter bad? If not, what else should I test out?

Eric

DanO

05:54PM | 04/18/07
Member Since: 11/11/02
2293 lifetime posts
** The igniter does not glow. It has continuity. **

You preformed this test while it was disconnected from the circuit? (see the following link)

- How do I test for continuity?

LINK > http://www.appliance411.com/links/jump.cgi?ID=817

Dan O.

www.Appliance411.com/parts/?ref411=Roper+Dryer

The Appliance Information Site

=D~~~~~~

eric17

07:34PM | 04/18/07
Member Since: 04/17/07
4 lifetime posts
Yes, I checked continuity after disconnecting the ignitor from the circuit. I did the same for the thermal fuse in the exhaust as well as both thermostats (150F & 205F). I tested the flame (radiant) sensor near the burner too. After disconnecting it, there was no continuity (as expected as there was no heat to close the circuit, right?). I reconnected the sensor and the ignitor, jumpered the leads on the sensor and turned on the dryer. The ignitor glowed this time but did not fire up the burner. Gas was not releasing into the chamber. What do I test next? The coils both have continuity. I assume this is normal? Is there a possibility the timer is bad?

DanO

09:44PM | 04/18/07
Member Since: 11/11/02
2293 lifetime posts
** I tested the flame (radiant) sensor near the burner too. After disconnecting it, there was no continuity (as expected as there was no heat to close the circuit, right?). **

The radiant sensor (see the following link) should have normally closed contacts (ie. HAVE continuity - zero resistance - when not in operation). Its contacts open when it senses a fully glowing ignitor, to cut it off.

- RGX4625EW1 Radiant Sensor

LINK > http://www.appliance411.com/data.php?rc=2681

** The coils both have continuity. I assume this is normal? **

Yes, however, they often fail (open up) after in use a while. In such a case the burner may light once or twice than fail. The failing coil might reset on its own once left to cool and then start acting up again.

- RGX4625EW1 Gas Valve Solenoids

LINK > http://www.appliance411.com/data.php?rc=3479

** Is there a possibility the timer is bad? **

If the burner is getting power, no part of the control system (timer, thermostats, fuses, etc.) are the problem. They just allow power to get to the burner. The rest is done by the burner itself.

Dan O.

www.Appliance411.com/parts/?ref411=Roper+Dryer

The Appliance Information Site

=D~~~~~~

eric17

09:12AM | 04/19/07
Member Since: 04/17/07
4 lifetime posts
This is good info, thanks. However, My question is why does the ignitor glow when I by-pass the radiant sensor, and it won't glow when connect that sensor? Perhaps it is bad?

When I got the ignitor to glow with the sensor by-passed, I tested the sensor for continuity while it was hot. There was none. I checked voltage to the ignitor (while it was disconnected). Voltage when sensor was connected was only 27v, while voltage when sensor was by-passed was 117v. Obviously the ignitor cannot glow with only 27v. Do these sensors go out like this?

DanO

09:34AM | 04/19/07
Member Since: 11/11/02
2293 lifetime posts
** My question is why does the ignitor glow when I by-pass the radiant sensor, and it won't glow when connect that sensor? **

I would assume because the sensor is defective. That conclusion would be further reinforced by the fact you said it has NO continuity... which is the exact opposite of what it should read when not detecting the heat of the ignitor.

JMO

Dan O.

www.Appliance411.com/parts/?ref411=Roper+Dryer

The Appliance Information Site

=D~~~~~~

eric17

01:28PM | 04/19/07
Member Since: 04/17/07
4 lifetime posts
Thanks for your help. Having this forum available was educational and productive. Replaced the Sensor and drying some clothes now. Thanks again!

Eric

DanO

06:46PM | 04/19/07
Member Since: 11/11/02
2293 lifetime posts
** Replaced the Sensor and drying clothes now. **

Glad to hear it. Thanks for the follow up.

Dan O.

www.Appliance411.com/parts/?ref411=Roper+Dryer

The Appliance Information Site

=D~~~~~~
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