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Maytag
Dryer

Model # GDG8420 Official Maytag washer/dryer

Here are the diagrams and repair parts for Official Maytag GDG8420 washer/dryer, as well as links to manuals and error code tables, if available.

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  • In the search box below, enter all or part of the part number or the part’s name.

Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

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Error Codes

Model diagram and schematic

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ALL PARTS
Showing 10 of 175 parts  |
Holding Coil 306106
#7

Inlet duct, gas valve & combustion cone diagram

Holding coil

Part #306106

Replaced by #279834

?
Manufacturer substitution
This part replaces 306106. Substitute parts can look different from the original.
BEST SELLER
$29.18 | 
17% OFF Phone Price : $35.18
In Stock
Second Coil 306105
#8

Inlet duct, gas valve & combustion cone diagram

Second coil

Part #306105

Replaced by #279834

?
Manufacturer substitution
This part replaces 306105. Substitute parts can look different from the original.
BEST SELLER
$29.18 | 
17% OFF Phone Price : $35.18
In Stock
Roller W/bea 303373
#16

Lint screen, tumbler (front & back) diagram

Roller w/bea

Part #303373

Replaced by #12001541

?
Manufacturer substitution
This part replaces 303373. Substitute parts can look different from the original.
BEST SELLER
$27.69 | 
18% OFF Phone Price : $33.69
In Stock
Gas Sensor 303377
#20A

Inlet duct, gas valve & combustion cone diagram

Gas sensor

Part #303377

Replaced by #WP338906

?
Manufacturer substitution
This part replaces 303377. Substitute parts can look different from the original.
BEST SELLER
$38.79 | 
13% OFF Phone Price : $44.79
In Stock
Idler Pulley 303705
#15

Motor, blower, base frame & thermostats diagram

Idler pulley

Part #303705

Replaced by #WP6-3037050

?
Manufacturer substitution
This part replaces 303705. Substitute parts can look different from the original.
BEST SELLER
$19.25 | 
10% OFF Was : $21.39
In Stock
Dryer Drum Bearing Kit (replaces 312940, 312941) 306508
#22

Lint screen, tumbler (front & back) diagram

Dryer drum bearing kit (replaces 312940, 312941)

Part #306508

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$12.59 | 
14% OFF Phone Price : $14.59
In Stock
Gas Igniter 304970
#9

Inlet duct, gas valve & combustion cone diagram

Gas igniter

Part #304970

Replaced by #4391996

?
Manufacturer substitution
This part replaces 304970. Substitute parts can look different from the original.
BEST SELLER
$34.39 | 
15% OFF Phone Price : $40.39
In Stock
Blower Wheel Clamp 312967
#2

Motor, blower, base frame & thermostats diagram

Blower wheel clamp

Part #312967

Replaced by #WP312967

?
Manufacturer substitution
This part replaces 312967. Substitute parts can look different from the original.
BEST SELLER
$8.39 | 
11% OFF Phone Price : $9.39
In Stock
Tumbler Shaft 312948
#15

Lint screen, tumbler (front & back) diagram

Tumbler shaft

Part #312948

Replaced by #WP6-3129480

?
Manufacturer substitution
This part replaces 312948. Substitute parts can look different from the original.
BEST SELLER
This item is not returnable
$7.19 | 
12% OFF Phone Price : $8.19
In Stock
Screw 313559
Screw

Part #313559

Replaced by #WP90767

?
Manufacturer substitution
This part replaces 313559. Substitute parts can look different from the original.
BEST SELLER
This item is not returnable
$4.37 | 
19% OFF Phone Price : $5.37
In Stock

Most common symptoms to help you fix your dryers

Choose a symptom to see related dryer repairs.

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Why is my dryer making a rattling noise?

Main causes: bad drum support roller, damaged idler pulley, broken blower fan blade, worn drum glide bearing, bad drive …

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Why won't my dryer heat?

Main causes: bad gas valve coils, broken heating element, tripped safety thermostat or fuse, bad operating thermostat, c…

Read more

Why won't my dryer door stay shut?

Main causes: damaged door strike, worn door catch…

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Why won't my dryer shut off?

Main causes: bad timer or electronic control board, door switch failure…

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Why doesn't my dryer work?

Main causes: lack of electrical power, bad power cord, wiring failure, bad control board, blown thermal fuse, bad door s…

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Why does my dryer start then stop?

Main causes: clogged exhaust vent, bad motor relay, loose dryer door catch, bad door switch, control system failure, fau…

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Why isn't my dryer getting my laundry dry?

Main causes: clogged exhaust system, heating system failure, deposits on moisture sensor, control system failure…

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Why won't my dryer start?

Main causes: door switch failure, lack of power, broken belt, blown thermal fuse, bad drive motor, control system failur…

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Most common repair guides to help fix your dryers

These step-by-step repair guides will help you safely fix what’s broken on your dryer.

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How to replace a dryer drum support roller

How to replace a dryer drum support roller

If your dryer thumps or squeals, replace the drum support roller to restore quiet to your home.…

Read more
Repair difficulty
Time required
 90 minutes or less
How to replace a dryer thermistor

How to replace a dryer thermistor

The thermistor senses the air temperature in the dryer. If your dryer overheats or doesn't heat at all, the thermistor …

Read more
Repair difficulty
Time required
 30 minutes or less
How to replace a dryer door switch

How to replace a dryer door switch

The dryer won't start if the door switch isn't working correctly. You can install a replacement dryer door switch in les…

Read more
Repair difficulty
Time required
 15 minutes or less

Effective articles & videos to help repair your dryers

Use the advice and tips in these articles and videos to get the most out of your dryer.

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How to use your clothes dryer efficiently

How to use your clothes dryer efficiently

Get expert tips on using your dryer efficiently to save energy.…

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How to enjoy all the online benefits we offer on our Sears PartsDirect website

How to enjoy all the online benefits we offer on our Sears PartsDirect website

Learn about all the convenient features on our Sears PartsDirect website that make your parts purchases easier.…

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Top questions about Sears and Sears PartsDirect

Get answers to frequently asked questions about Sears and Sears PartsDirect.…

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