Heater making loud sound with strong smell.

[Smcollier70]

Good morning, it’s the dead of winter, Christmas Eve 2022 wouldn’t you know it my heater makes a dull humming sound. It’s three 3 AM. What to do now? I happen to be on the couch up late when this happens. So it only took a few moments to notice a problem. I immediately go to the Nest thermostat to shut it off.  Less than five minutes pass. There’s a terrible smell.   Thank goodness it didn’t catch on fire.  Smoldering maybe. Could it be lint on the coils? Idk. Could it be the thermostat? My only source of heat is now my oven. Or a plug in heater. My thermostat did not register any issues and the app didn’t either.   Does anyone have suggestions for my concerns? Thank you. Merry Christmas 🎄 

[Jhonleanmel]

Hi Smcollier70,

Thanks for reaching out ― let's see what's going on.

Give these steps a try:

Check your air filter, as a clogged filter may cause a similar symptom. 
If the air filter is dirty and needs to be changed, I recommend replacing it and let us know if the issue continues after you change the filter.

Keep us posted.

Best,
Mel

[Markjosephp]

Hello there,

Thanks for helping, Mel.

Uh oh! It appears that you might need urgent help to inspect your system, @Smcollier70. Please contact any local technician or a Nest Pro to figure out what happened. This might be a wiring or power issue that causes the problem. Also, for your safety and to prevent any damage to your system.

Feel free to let us know if you have more questions.

Regards,

Mark

[Markjosephp]

Hello Smcollier70,

I'm checking in to make sure that you've seen our response. Please let us know if you have any additional questions or concerns before we lock this thread in 24 hours.

Thanks,

Mark