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Five Signs Your Heating System Needs Repair
Five Signs Your Heating System Needs Repair
03May 2025

We're all familiar with the supreme comfort and convenience that HVAC systems provide, but many property owners take them for granted. That is, until the chill creeps in and your heater just isn’t cutting it. By that point, you’re already uncomfortable and possibly facing a bigger heating repair bill than necessary.

The truth is a properly-installed heating system rarely fails without warning. Most of the time, it drops subtle - and sometimes not-so-subtle - hints that something’s not quite right. Catching these signs early is your best chance to keep costs down, avoid emergency repairs, and extend the life of your system.

In this brief article brought to you by your local HVAC company, Purified Air, we walk through five warning signs that mean it’s time to call in the professionals. The licensed and insured technicians at Purified Air are always ready to help, so feel free to call or message at any time of the day.

Five Signs Your Heating System Needs Repair

Reviews

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El Gallo

Purified Air Heating and Air Conditioning exceeded my expectations with their outstanding service near Highland Park. Roman, the technician who visited my home, was not only highly skilled but also courteous and approachable. He took the time to explain everything in detail, ensuring I understood the work being done and the associated costs. His professionalism and the high quality of his work made the entire experience seamless and stress-free. I highly recommend Purified Air for anyone in need of top-notch HVAC services.

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Conch Kail

Purified Air did a fantastic job with our new HVAC installation. The team was professional, efficient, and ensured everything was set up perfectly. Our home is now comfortable and the air quality has improved significantly. Highly recommend their services

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Mayritas World

I recently had my AC repaired by Purified Air Heating and Air Conditioning, and I couldn’t be happier with the service. The technician was prompt, professional, and knowledgeable. They quickly diagnosed and fixed the issue, restoring cool air to my home in no time. I highly recommend their services to anyone in need of HVAC repairs. Thank you, Purified Air, for your excellent service!

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Juan Lara

After hearing great things from my neighbor, I decided to try Purified Air Heating and Air Conditioning for a heating system check-up. They did not disappoint. The team was courteous, on time, and very knowledgeable. It’s clear why they came so highly recommended, and I’ll be sharing my positive experience with others in the neighborhood

Your System Is Blowing Cool or Inconsistent Air

Let’s start with the no-brainer: If your heater is blowing cool air or not heating your space evenly, then there's obviously something wrong. Even if the air eventually feels warm, the uneven performance means your system is working harder than it should, racking up higher energy bills, and shortening its lifespan.

This common issue could point to a failing heat exchanger, a malfunctioning thermostat, or airflow issues caused by clogged filters or a struggling blower motor. It might also signal ductwork leaks that are allowing warm air to escape before it reaches your rooms. This is something that demands a thorough investigation for accurate diagnosis and a long-lasting fix.

Strange Noises from the Unit

Heating systems won't be silent, but they also shouldn’t sound like a rock concert warming up. Banging, rattling, screeching, buzzing, or grinding noises aren’t part of normal operation. These noises are more than annoying. If ignored, they can escalate into major repairs or even system failure.

So, what do those sounds mean? Rattling might mean loose components. Screeching could indicate a worn-out belt or bearing in the blower motor. The banging? That could signal a serious issue like delayed ignition or expanding ductwork.

A Sudden Spike in Energy Bills

Here's a headscratcher: You haven’t changed the thermostat setting, but your utility bill has skyrocketed. An inefficient system isn’t just expensive; it’s a sign that something is wearing out or working poorly behind the scenes. The longer you wait, the more damage (and cost) you may face.

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Considering today's economic outlook, we get called in often to address energy waste. The issue boils down to something simple, but diagnosis must be precise. Basically, your system might be running longer and harder than necessary to maintain the same indoor temperature. This can be due to dirty filters, thermostat misreads, duct leaks, or failing components like the blower or heat exchanger.

Odd Smells When the Heater Kicks On

You might smell dust burning off when you first fire up your heating system in the fall, but persistent or pungent odors should NOT be ignored. Musty, metallic, or burning smells are especially concerning. These often indicate serious issues such as a gas leak or mold growth.

Whether it's the smell of overheating components and wiring problems or mold and mildew growth, these should be addressed as soon as possible. The health and safety risks are too great to take lightly.

The Thermostat Doesn’t Seem to Match the Temperature

If you set the thermostat to 70 but your living room still feels like a fridge, or if the heat keeps cycling on and off too frequently, then it's time to inspect the thermostat. Even if your system is producing warm air, poor communication between the thermostat and the heating system can affect comfort, efficiency, and lifespan.

Our heat repair technicians come out ready to address the thermostat, but we'll be paying attention to deeper issues like short cycling, airflow restrictions, and incorrect system calibration as well.

Call Purified Air to Get in Touch

At Purified Air, we know that heating problems never arrive at a convenient time. That’s why we offer emergency heating repair in Sherman Oaks. Homeowners and businesses in the area are always welcome to give us a call or message. We are ready when you are.

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