Strange Smells from HVAC
Unusual odors coming from your heating or cooling system
Call for Help: (650) 397-7060🔍Common Symptoms
- •Burning smell when heat turns on
- •Musty or moldy odor
- •Rotten egg smell
- •Chemical or electrical burning smell
- •Dusty smell from vents
⚠️Possible Causes
- •Dust burning off (seasonal startup - usually harmless)
- •Mold in ductwork or on coils
- •Gas leak (rotten egg smell - emergency)
- •Electrical component overheating
- •Dead animal in ductwork
- •Dirty air filter
What You Can Check Yourself
Before calling for service, you can safely check these things:
- 1Replace air filter
- 2Check for obvious mold near vents
- 3Note when smell occurs and duration
📞When to Call a Professional
- ⚡Rotten egg or sulfur smell (evacuate, call gas company)
- ⚡Burning plastic or electrical smell (turn off system)
- ⚡Persistent musty odor
- ⚡Any smell that doesn't go away quickly
Call (650) 397-7060
Same-day appointments available
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Strange Smells from HVAC FAQs
Find answers to common questions about our services
Repair costs depend on the specific cause. A simple fix like replacing a filter might be minimal, while compressor or heat exchanger issues can be more significant. We provide upfront pricing before starting any work.
While not usually an emergency, you should address it soon to prevent further issues. We offer same-day service in most cases.
You can try the basic troubleshooting steps above (filter changes, thermostat checks). However, for anything involving electrical, gas, or refrigerant, you should call a licensed professional.
Experiencing Strange Smells from HVAC?
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