LG Dryer Troubleshooting


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Old 09-29-23, 02:13 PM
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LG Dryer Troubleshooting

So the dryer doesn't get hot. I've disassembled it hoping to discover a discontinuous limit switch but no luck. Here's a video of what I got:

https://youtu.be/zO5he0NlIsE

Any ideas on what else to test?

Thanks.
 
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Old 09-29-23, 03:02 PM
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All thermal switches should check as shorted.
Looks like a lot of lint around blower wheel.
Removing it may crack it. Vacuum thru the blower opening with a thin vacuum tool.
I would remove the discharge duct from the back and vacuum the line up to the blower wheel.
Check the line going outside.
Lint buildup is the #1 cause of dryer failures.

In order to supply actual troubleshooting info.... I need the model number.
 
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Old 09-29-23, 03:13 PM
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The lint blower does seem to have some buildup. I'll try and verify if that's the case.

Shouldn't the igniter have continuity though?

And Here's a photo of the model #




 

Last edited by PJmax; 09-29-23 at 04:48 PM. Reason: added diagram
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Old 09-29-23, 04:55 PM
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The igniter should measure between 50-800 ohms.
Safety thermostat - manual reset - less than 1 ohm.
Hi limit thermostat - less than 5 ohms.
Flame detector - less than 1 ohm.
Gas valve coils - 1.5kΩ~2.5kΩ
 
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Old 09-30-23, 12:11 PM
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OK here are the readings:

(on the 200 Ohm setting)
Top-right limit switch: 00.3 - 00.6
Mid-left switch: 00.4
Bottom-left limit switch: 00.3 - 00.5

(On the 2k ohm setting)
Igniter: 0.259 - 0.261

(On the 20k ohm setting)
Gas valve coil terminals: 1.94

I tested them with two different probes since I thought one pair wasn't accurate.

I checked the blower wheel and while there was some lint buildup, it appeared to be clean beyond the wheel. I'll do a more thorough test though.

*Edit: The lint vent was indeed clogged. I managed to clean a lot of it out ny hand and vaccumm it to some extent. If everything else is testing good then I'll reassemble this thing and go from there. But the lightbulb inside the dryer has burned out, so that needs replacement.
 

Last edited by orielonline; 09-30-23 at 12:35 PM.
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Old 09-30-23, 06:53 PM
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Your measurement all look to be within mfg posted specs.
 
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Old 10-04-23, 12:07 PM
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Thanks for your help! The dryer is working as inteneded with the exception of the interior light bulb. I tried replacing it with an LED equaivalent off of amazon but is was to no avail. I know it's getting electricity though because I shocked myself (twice) while trying to test it...lol... the socket itself has continuity with the correct contacts and the black wire goes to the gold which goes to the base of the socket.

Is it testy with the bulb you use? I would want to test the buld itself but I don't think I have the base for it.

 
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Old 10-04-23, 12:50 PM
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Looks like a standard incandescent bulb. Manual shows test resistance of 80-100 ohms.
 
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Old 10-04-23, 01:39 PM
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I'll test it but shouldn't it work with the same standard bulb fixture? I never thought about testing ohms, just thought the base would indicate the standard.
 
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Old 10-04-23, 01:42 PM
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The resistance specified is for testing an incandescent bulb.
I have no idea what an LED bulb would measure.
There should be 120vac to the socket.
 
 

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