Why Isn’t My Heater Working? Most Common Issues

Having a heater that’s acting up is a pain in the neck, especially as the temperature starts to plunge. If you’re standing in front of the thermostat wondering what gives?, you’re not alone.

At South Placer Heating and Air, we’ve helped thousands of homeowners with heater repair in Roseville, and trust us, some problems are more common than you might think. Let’s walk through the top reasons your heater might be on the fritz and what to do about it.

1. Your Air Filter Might Be Gunked Up

Seriously, this is the #1 culprit. A clogged filter means your system has to work way harder to push air through, and eventually, it can just stop working altogether.

Quick fix: Swap that old filter out. You’ll likely feel a difference pretty quickly, and your heater will thank you.

2. Thermostat Problems

Plenty of times heating problems start with the thermostat. From simple fixes like dead batteries or wrong settings to the unit itself being outdated, it can throw your whole system off.

Check it: Make sure it’s set to heat, the temp is where you want it, and the screen’s not blank. Still not working? It might be time for a replacement or a quick service visit.

3. The Pilot Light or Ignition Isn’t Doing Its Job

If you have an older furnace with a pilot light, or a newer one with electronic ignition, any issue here means no heat for you. You might hear a lot of clicking, smell gas (not good), or just get a whole lot of nothing.

Heads-up: This isn’t a DIY fix. Gas and electrical components are better left to pros. We’ve got your back if this one pops up.

4. Safety Switches Could Be Shutting It Down

Heaters are smart these days, and they’ll shut down to protect themselves if something isn’t right, like overheating, airflow problems, or a cracked heat exchanger.

Don’t ignore this one. If your heater keeps shutting off, give us a call. It’s probably trying to tell you something important.

5. There’s a Power Issue Somewhere

If your heater won’t turn on at all, check your breaker box. Sometimes a flipped breaker or blown fuse is all it takes to stop the heat.

Reset it if needed, but if the breaker keeps tripping, there’s likely a bigger issue happening behind the scenes.

6. Your Ducts Might Be Messy

Uneven heating? Cold rooms while others are toasty? Your ductwork might have leaks, blockages, or even critters hanging out (yikes).

We can help inspect your ducts as part of any heater repair in Roseville. It’s all part of getting your system working like new again.

7. Your System Might Just Be Old

If your furnace is pushing 15 years, it might be time to consider upgrading. Especially if you find yourself calling in for repairs or

Not sure if it’s time to upgrade? Reach out today and we’ll schedule an inspection.

Need Help Now? Call South Placer Heating & Air

If your heater’s giving you the cold shoulder, don’t stress, South Placer Heating & Air is here to help.

Call us today at 916-246-2089 or contact us online, and one of our experienced techs will be out in no time to take care of the issue.

Because at South Placer Heating & Air, your comfort is our priority, and we mean that.