Parts for DG8420 — Whirlpool Dryer

We found 12 parts confirmed to fit the Whirlpool Dryer DG8420.

Compatibility table

Prices shown are an informational reference range only, not an offer or an Amazon price — RepairKitHub does not sell parts directly. Each part links to an Amazon search so you can compare current listings yourself.

Common failure areas on this model

The confirmed parts above group into a handful of failure areas. Here is what each points to and how to check it before you order anything.

Heat control (thermostats, fuses, heating element)

Symptom: The dryer runs but produces no heat, or it shuts off partway through the cycle.

Check: With the dryer unplugged, check continuity across the part with a multimeter -- no continuity means it has failed. Clear the lint vent first, since a blocked vent is what usually trips a thermal fuse in the first place.

Parts in this group on DG8420: WP307250 (Dryer Multi-Temperature Gas Thermostat).

Controls, timers and wiring

Symptom: A cycle that doesn't advance, an unresponsive display, or the dryer not starting at all.

Check: Look for burn marks or a burnt smell near the board or terminals, and check whether buttons and knobs respond -- a unit that powers on but won't cycle often traces back to this group.

Parts in this group on DG8420: WP306040 (Dryer Timer).

General hardware and mounting parts

Symptom: A small mechanical or mounting part has failed, cracked, or gone missing.

Check: Compare the physical shape and mounting points to the original piece, and confirm the exact part number against your model plate before ordering.

Parts in this group on DG8420: WP306176 (Gas Valve with Coils), 306106 (Holding Coil), 306105 (Second Coil), 303377 (Gas Sensor), 303836 (Impeller), 312958 (Lock Ring, I).

Drive system (belts, pulleys, motors)

Symptom: A drum or tub that won't turn, a burning-rubber smell, or a loud thump or squeal during a cycle.

Check: With power off, turn the drum or tub by hand -- resistance or grinding points to the motor or a bearing, and a cracked, glazed, or snapped belt is visible once the cabinet is open.

Parts in this group on DG8420: 312959 (Dryer Drum Belt), 312527 (Idler Washer), 303705 (Idler Pulley), 303373 (Roller W/bea).

Before you buy

Match DG8420 exactly against the model and serial plate on the appliance itself before ordering anything — a single mismatched character can point to a different production run with different parts. Then check the part number printed or stamped on the part you are replacing against the part numbers in the table above; the printed number is the most reliable way to confirm fitment when a model has gone through multiple production runs. RepairKitHub does not sell parts directly — every part link above routes to an Amazon search for that part number so you can compare current listings and sellers yourself.

How to confirm this is your model

On most dryers, the model and serial plate sits inside the door opening or behind the lint trap. Match every character exactly, including letters and dashes at the end — appliance model numbers often have similar prefixes but different suffixes for different production runs.

Neighbouring Whirlpool Dryer models

These model numbers sort next to this one in the catalog and are usually the same product family.

• DG8500 — 11 parts
• DG8600 — 11 parts
• DG9700 — 12 parts
• DLE330RAW — 10 parts
• DLE330RCW — 10 parts
• DG8300 — 12 parts
• DG8200 — 12 parts
• DG810 — 14 parts
• DG8000 — 12 parts
• DG7800 — 13 parts

Still not sure?

Use the model lookup tool to search by model or part number, or start from the symptom your appliance is showing.