How a dryer makes heat, and where it stops
An electric dryer heats with a coiled element in a metal housing, fed 240 volts through the two legs of a double breaker. The drum motor runs on just one of those legs, so a dryer can tumble happily with no heat when the other leg is lost or the element’s coil breaks. Guarding the element are safety parts: a high-limit thermostat, a cycling thermostat and a one-time thermal fuse that blows when the dryer overheats. On a gas dryer, an igniter glows, a flame sensor sees that heat and hands off to the gas valve coils, which open to light the burner. Weak coils leave a telltale pattern: the igniter glows, goes dark and no flame follows. Every one of these parts can be tested with a meter.
Around here, the vent is often the real culprit. Rain and fog keep exterior vent hoods damp, moss and fir needles jam the flapper, and ducts that cross an unheated crawlspace or attic sweat condensation that turns lint into paste. A choked vent traps heat in the cabinet until the thermal fuse or high-limit gives up. Westside ramblers and the split-levels of Braemar and Canterbury can have long duct runs under the house. Gas is common too, from PSE gas service in town to propane tanks on the unincorporated edges past Littlerock Road, so igniters and valve coils come up often. And after a windstorm outage, a worn double breaker can lose one leg while its handle still looks on, which mimics a dead element.
Cold-dryer symptoms, gas and electric
| What happens | Usual cause | Can you check it? | Our repair |
|---|---|---|---|
| Electric model tumbles but stays cold | An open element, blown fuse or tripped high-limit | No: testing needs the back panel off | Test every heat part, swap the bad one, inspect the vent |
| No heat right after a power outage | One breaker leg lost, or one fuse blown in an older panel | Yes: switch the double breaker fully off, then on | Measure both legs at the terminal block before blaming the element |
| Gas igniter glows, then goes dark, no flame | Weak gas valve coils | No: gas valve parts are ours to handle | Test and replace the coil set, then watch several ignitions |
| Gas igniter never glows | Broken igniter, flame sensor or a blown thermal fuse | No: leave the gas side closed up | Meter the igniter, sensor and fuse in order |
| Heat for a few minutes, then cold | Choked vent tripping a thermostat or the high-limit | Yes: feel for strong airflow at the outside hood | Test the thermostats and show you where the vent restricts |
Safe checks before you book
- Make sure the cycle isn’t set to air fluff or another no-heat setting.
- Switch the dryer’s double breaker fully off, then firmly back on.
- Empty the lint screen before each load; scrub it with soapy water if dryer sheets film it over.
- With the dryer running, step outside and check that the vent hood flap opens and blows.
- Clear moss, needles and nests from the outside hood after each windstorm season.
- At any gas odor, walk out without flipping switches and call PSE from the yard.
When a cold dryer needs a meter
Book once the breaker and the settings check out and the clothes still come out cold, or any time a gas dryer’s igniter glows without lighting. A blown thermal fuse is a warning about airflow, so replacing it without clearing the vent only buys time. On the visit, the meter goes across each heat part for your fuel type, electric or gas, and the vent run gets a look too. Next you get the repair figure in writing. Agree to it and the $99 already sits in that number rather than on top; pass, and the ticket closes at $99.
Asked about this problem
Why does my electric dryer spin but not heat?
Because the motor and the heat run on different power. The motor needs one 120-volt leg; the element needs both legs for 240 volts. A broken element coil, an open thermal fuse or high-limit, or a double breaker that dropped half its supply all leave the drum turning with no warmth. Reset the double breaker fully off and on first; if that doesn’t help, the meter sorts out the rest.
What does a thermal fuse do, and why did mine blow?
It is a one-time safety link that opens when the dryer runs too hot. On some models it stops only the heat; on others it stops the whole dryer. It rarely fails on its own. Usually a clogged vent, a crushed duct or a stuck hood flap trapped heat inside, so the vent gets checked before a new fuse goes in.
Do you repair gas and propane dryers in Tumwater?
Yes, in Tumwater, Olympia and Lacey. We service gas dryers on PSE natural gas and on propane, including Whirlpool, Maytag, GE, Samsung, LG, Kenmore and Speed Queen. A propane dryer must be set up for propane; a natural-gas dryer moved onto a tank without conversion won’t burn right. Check your propane gauge before you call. Installing or extending gas lines is a plumber’s job.
Is a damp dryer vent really a problem in Olympia?
It is. Where a duct runs through a cold crawlspace or attic, warm, moist exhaust condenses inside it, and lint that should blow out sticks to the wet walls. Over a rainy season it builds into a paste that narrows the duct. Longer drying, a hot cabinet and a blown thermal fuse follow, and a clogged vent is a fire risk. Clean the run at least once a year.
Is a dryer that won’t heat worth fixing?
Usually. The heat parts that usually fail, from elements and fuses to igniters and coils, rank among the most routine dryer work, and dryers are simple machines built to run a long time. We name what broke and price the job in writing before starting, and if a worn drum bearing or tired motor makes the repair a poor bet, the technician tells you. Any repair carries a warranty in writing on the invoice.
