Dryer Runs But Won't Heat: Vents, Elements and Gas Valves Explained
Long vent runs in Philadelphia row homes are the number one cause of dryers that tumble without heat.
Check the vent first — always
Row homes often have vent runs that travel 15 to 25 feet with several elbows. Lint accumulates, airflow drops, and the thermal fuse blows to protect the machine. Replacing the fuse without clearing the vent guarantees a repeat failure.
If clothes are damp and the drum smells hot, restricted airflow is the likely cause and it is also a genuine fire risk.
Electric vs gas failures
Electric dryers lose heat when the heating element burns out, the thermal fuse opens, or one leg of the 240V supply is lost — a common cause when the drum still turns.
Gas dryers usually fail at the igniter, the flame sensor or the gas valve coils. These are inexpensive parts but require correct diagnosis and safe handling of the gas line.
Preventive maintenance
Clean the lint screen every load and have the full vent run professionally cleared once a year. It shortens dry times, lowers energy bills and prevents most no-heat calls.
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