Whirlpool WED6620HW0 Dryer Not Heating — What Part Fixes This?
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Understanding the Problem
If your Whirlpool WED6620HW0 tumbles but doesn’t produce heat (or takes extremely long to dry), the cause is almost always a failed component in the dryer’s heat circuit or a power-supply issue. Common culprits include a blown thermal fuse, an open heating element, a failed thermostat, or loss of one 120V leg of the household 240V supply. These faults either prevent the element from receiving power or shut the heater down as a safety measure. Start with basic, safe checks (power and venting), then move to electrical diagnostics if necessary. Many failures are straightforward to confirm with a multimeter and replaceable modular parts. Always unplug the dryer before opening panels and double-check model/serial compatibility for parts — Whirlpool sometimes uses different components across similar models.
Common Symptoms
Drum spins but clothes remain damp; dryer runs but takes very long to dry; no heat though motor and lights function; dryer trips breaker or blows thermal fuse.
Common Causes
- Blown thermal fuse (safety device that opens on overheat or blocked vent)
- Open or shorted heating element assembly (coil damaged)
- Faulty cycling thermostat or high‑limit thermostat preventing heater from powering
- Loss of one 120V leg at the household 240V supply — motor runs but element doesn’t
- Faulty timer or electronic control board (less common) or damaged wiring/terminal block
- Restricted exhaust/venting causing the thermal cutouts to trip
Popular Parts That Fix This Problem
These are the most common replacement parts that fix this problem. When you're ready to order, click below to find the right part at PartsDiscount.com — just search by your appliance model number for a guaranteed fit.
Helpful Repair Tip
Confirm the fault by checking for 240V across the dryer’s terminal block (with the dryer plugged in) and measuring continuity of the thermal fuse and heating element with a multimeter (unplugged first). If the thermal fuse is open, replace it — it often indicates an upstream airflow or heating fault.
Frequently Asked Questions
How do I know if the thermal fuse is bad?
With the dryer unplugged, remove the access panel to reach the thermal fuse and test it for continuity with a multimeter. An open (infinite) reading means the fuse is blown and should be replaced. Note: a blown thermal fuse often indicates a venting or overheat issue — clear the vent and check the heating element before replacing.
Could a dryer run but not heat if it has power?
Yes. An electric dryer needs both 120V legs (240V total) for the heater. If one leg is missing (loose breaker, bad outlet, or wiring), the motor may run (which uses a single leg) while the heating element won’t get full voltage. Always check the dryer’s terminal block voltage before replacing heating parts.
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