The Call
A homeowner in Weston called us about their Samsung electric dryer running normally — drum turning, timer counting down — but producing no heat whatsoever. Clothes were coming out as wet as they went in after a full 60-minute cycle.
A dryer that tumbles but doesn't heat is one of the most common service calls we handle. The diagnosis process is methodical and fast when you work through the circuit in the right order.
Diagnosis — Working Through the Heating Circuit
Checked the wall outlet voltage
Before opening the dryer, measured voltage at the 240V outlet. Read 240V across both legs — confirmed the outlet was delivering full power. An electric dryer needs both 120V legs to heat; a tripped breaker on one leg will cause the drum to turn but produce no heat.
Tested the thermal fuse
Located and tested the thermal fuse (a one-time safety device that blows if the dryer overheats). Tested continuity — fuse was intact. If this had blown, it would have been a $15 fix but also a sign the dryer is overheating due to a clogged vent.
Tested the cycling thermostat
Tested resistance across the cycling thermostat. Reading was within spec — thermostat operating correctly.
Measured resistance across the heating element
Disconnected the heating element and measured resistance across its terminals. Got an open loop reading (infinite resistance) — confirmed the element had failed. A healthy element reads between 8–12 ohms on most Samsung models; open loop means the element's coil is broken.
The Repair
Our technician had the correct Samsung heating element in the van. Replaced it in 30 minutes including the test run at the end to confirm heat was restored.
Why Do Heating Elements Fail?
The heating element is a coiled resistance wire inside a metal housing. Over time — typically after 5–10 years — the wire fatigues from thousands of heating and cooling cycles and eventually develops a break. There's often no warning: the element works fine one day and fails the next. Overloading the dryer or restricted airflow from a clogged vent duct can accelerate element failure by causing it to run hotter than designed.