If you smell gas, leave the house immediately and call your gas utility from a safe location. Do not turn on lights, appliances, or the furnace.
What does furnace smells like gas mean?
Natural gas and propane are odorized so leaks are detectable. Any strong gas smell means you should treat it as an emergency regardless of whether the furnace is running. Do not use switches, flames, or the furnace until a professional clears the system.
What usually causes furnace smells like gas?
Typical repair: $350–$900
Typical repair: $1,500–$3,500
Typical repair: $350–$900
Find your exact error code
Select your furnace brand to jump to the code page for this symptom.
What should I check first when furnace smells like gas?
If you smell gas, leave the house immediately and call your gas utility from a safe location. Do not turn on lights, appliances, or the furnace.
What a repair costs
A gas valve replacement typically costs between $350 and $900 nationally.
This is general information, not professional advice. Gas, electrical, and combustion repairs can be dangerous — when in doubt, call a licensed technician.