Few appliance moments sharpen the attention like catching a gas smell near the dryer. The good news: there's a clean line between the harmless version and the dangerous one, and it takes about thirty seconds to know which side you're on. Let's draw that line precisely, because this is the one article where guessing wrong matters.
The normal side of the line
A faint gas whiff in the first seconds after the burner lights — especially on an older machine or after the dryer sat unused — can be ordinary: a small puff of unburned gas escapes before the flame establishes, and the exhaust carries it briefly. It's momentary, it fades within a minute, and it doesn't recur through the cycle. Same for a dusty burning smell on the season's first heavy use; that's dust, not gas.
The other side: stop and act
Gas smell that lingers or grows during the cycle, appears while the dryer is idle, or is strong enough to notice from across the room is a leak until proven otherwise. The script: turn the dryer off, close the gas valve behind it if you can reach it without contortion, open windows, don't flip switches or light anything, and step outside to call — PG&E's leak line or 911 for a strong smell, us for the borderline case you've made safe. We treat suspected-leak calls as same-day priority across the South Bay, and we'd genuinely rather come sniff a false alarm than the alternative.
What actually leaks inside a dryer
The usual suspects, found with an electronic detector and bubble solution: the flexible gas connector behind the machine (aged, kinked from the dryer being shoved against the wall, or a reused connector from the last machine — a code no-no), the fittings at the shutoff and the burner inlet, and the gas valve itself weeping at its seams. A related failure that mimics a leak: weak igniter or valve coils letting gas flow a beat too long before ignition, giving you that raw-gas note every single cycle start — not a leak, but an inexpensive repair that removes the ritual of wondering.
After the fix
Every gas-dryer repair we close ends the same way: connections leak-tested, burner watched through a full ignition cycle, flame color checked, and the vent path confirmed clear — because a gas dryer exhausts combustion products, and its airflow is a safety system, not a drying accessory.
