Safety note: If you smell gas, see scorching, or suspect an electrical issue, stop and schedule service. For any internal testing, unplug the dryer (and shut off gas on gas models).
1) Confirm the cycle settings (it’s more common than you think)
“Air dry,” “fluff,” or some sensor cycles can run with low or no heat depending on selections. Also, bulky items can ball up and trap moisture, making the dryer seem weak. Manufacturer support guidance commonly recommends checking cycle choice and load type when drying is slow. (
lg.com)
2) Check the lint screen and door seal
Remove the lint filter and clean it thoroughly. If you use fabric softener sheets, waxy residue can coat the screen and reduce airflow. Rinse the screen with warm water and a soft brush if needed, then dry completely before reinstalling.
3) Inspect the vent path (the #1 performance killer)
Look behind the dryer. If the flexible duct is crushed, kinked, excessively long, or packed with lint, airflow drops and heat can’t move through the drum. Many “dryer not heating” or “takes too long” complaints are resolved by correcting vent restrictions. (
repair.geappliances.com)
Quick test: Go outside and check the exterior vent hood while the dryer runs. Weak airflow, no airflow, or a flap that barely opens suggests blockage.
4) Electric dryer only: check your breaker
Many electric dryers run on 240V but can still tumble on partial power if one breaker leg trips. Some manufacturer documentation notes you may need to reset both breakers/fuses for proper heating. (
c.searspartsdirect.com)
5) Gas dryer only: confirm the gas is on
Make sure the shutoff valve is fully open and the home gas supply is active. If the dryer tumbles but won’t ignite, it can be an ignition-system issue (igniter, flame sensor, gas valve coils), which often requires diagnosis. (
adriumservice.com)