Freedom Appliances treats a call that begins with "my gas stove smells like gas" differently from any other stove repair in Calgary. Safety comes before diagnosis. A faint whiff when a burner lights is normal. A smell that lingers, grows, or appears when nothing is on is not. This guide walks through what to do in the first five minutes, what usually causes the smell, and how we track it down and fix it so you can cook with confidence again.
If the smell is strong, or you feel light-headed, leave the house and call your gas utility's emergency line from outside. Do not flip switches or light anything on the way out. If the smell is faint and you feel fine, follow these steps:
1. Turn every burner knob and the oven to OFF and confirm each one is fully seated.
2. Open windows and, if you can, the exterior door nearest the kitchen.
3. Do not use lighters, candles, or any appliance that sparks.
4. Locate the stove's shut-off valve behind or beside the range and turn it a quarter turn to close.
5. Wait for the smell to clear before you investigate further.
ATCO publishes clear guidance for Alberta homes on its natural gas safety page, including what a leak smells like and who to call. Natural gas has no odour of its own. The rotten-egg smell comes from an additive called mercaptan, which is there precisely so you notice.
Not every gas smell means a leak. Understanding the difference helps you stay calm and act correctly.
The most frequent cause is also the simplest. A knob bumped slightly past OFF lets a trickle of gas flow. Children, pets, and a sleeve brushing the panel do this often. Check every knob by turning it firmly to the off position.
When a spark igniter is weak or dirty, gas flows for several seconds before ignition. That delay produces a strong smell each time you cook. Our post on a gas burner that will not light covers the ignition side in depth. On ovens, a glow-bar igniter that has weakened lets the valve open late, with the same effect.
The flexible gas connector behind the range ages. Older brass connectors can crack, and fittings can loosen when a range is moved for cleaning. This kind of leak produces a smell with the stove off and is a job for a licensed technician.
Each burner has a valve that seals when the knob is off. Grease and wear let those seals weep. The manifold that feeds the valves also has fittings that can loosen over time. These leaks are small but persistent.
A burner with a yellow, lazy flame is not burning all of its gas. The result is an odour plus carbon monoxide. Our article on yellow flames on a gas stove explains the air-mix adjustment involved.
| Symptom | Likely cause | What we do |
|---|---|---|
| Smell with all knobs off | Loose fitting, cracked connector, weeping valve | Soap-bubble and electronic leak test, replace connector or valve |
| Strong smell when lighting a burner | Weak spark or dirty igniter | Clean or replace igniter, check spark module |
| Smell during oven preheat | Weak glow-bar igniter | Test igniter current, replace igniter |
| Smell plus yellow flames | Poor air mix, blocked burner ports | Clean burner, adjust air shutter, verify flame |
| Smell only after a boil-over | Flame blown out with valve open | Clean burner head, confirm valve closes fully |
| Smell near the wall, not the cooktop | Supply line or shut-off valve | Test supply connection, refer to a gas fitter if required |
A nose is a poor measuring tool. We use an electronic combustible-gas detector to sweep the burner valves, manifold, oven valve, and the connector behind the range. Any hit gets a soap-solution test to pinpoint the fitting. We then repair or replace the failed part, pressure-check the connections, and light every burner to confirm clean ignition.
If the leak is in the house piping rather than the appliance, we tell you right away. That work belongs to a licensed gas fitter, and we will not leave a supply line in an unsafe state.
A gas stove that smells like gas only during a slow light is usually a quick igniter repair. When a gas stove smells like gas with everything off, there is a reason, and that reason needs a technician.
My gas stove smells like gas only when I turn a burner on. Is that a leak?
Usually not. It is the short delay between gas flow and ignition. If the delay is longer than a couple of seconds, the igniter is weak and should be serviced. A strong smell with the stove off is the true leak warning.
Should I call the gas company or an appliance repair company?
If the smell is strong or you feel unwell, leave and call the utility emergency line first. Once the house is safe, an appliance repair company handles leaks inside the stove itself. Piping in the wall belongs to a gas fitter.
Can I use the soap-bubble test myself?
You can test visible fittings with soapy water, and bubbles confirm a leak. Do not loosen or tighten gas fittings yourself. Close the shut-off valve and book a technician.
How often should a gas stove be checked?
Industry guidance suggests an inspection every one to two years for gas cooking appliances, and sooner if the range has been moved. Regular cleaning of burner heads reduces most ignition-related smells.
Freedom Appliances is a Red Seal certified appliance repair company based in Calgary, serving Calgary, Airdrie, Cochrane, Chestermere, Okotoks, and High River.
Tell us what you smelled and when, and we will prioritize your visit.
Same day service • Red Seal certified • $49 service call