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How Do I Know When It’s Time to Upgrade My Home’s Heating System?

Published on: January 14, 2026

air conditioner warning

San Antonio homeowners are spared the sub-zero temperatures of the north. Yet winters still pack a punch, often without much warning. You need a reliable heating system to keep your family comfortable when the temperatures inevitably drop. 

But even the best heating systems don’t last forever. How can you tell when yours just needs a quick repair or if it’s on its way out? Take a closer look at the warning signs to save you from an emergency breakdown.

How Long Will My Heating System Last?

Most modern units last between 15 and 20 years with proper maintenance. Any equipment approaching the two-decade mark is automatically up for reevaluation. Not only are these systems usually less efficient due to wear and tear, but they also don’t have any of the same energy-saving features you’d find with new models. 

Even if you can repair your system, the 15-year mark is usually when it’s more cost-effective to upgrade heating equipment than fix it.

What Are the Signs of a Failing Heater?

Age isn’t always enough to diagnose a failing heater. Fortunately, your unit will often tell you when it’s struggling. You just have to know what you’re looking for.

Loud Noises

Banging, rattling, or squealing sounds are all abnormal and usually mean there’s something broken or loose inside your heating system. HVAC technicians can often fix this, but whether it’s worth fixing depends on the cost of the part compared to a heater installation.

Rising Energy Bills

If you’ve noticed your energy bill creeping up over the last few winters, even if you haven’t changed your usage, that could mean that your system is wearing down. A new heating system has a higher AFUE (annual fuel utilization efficiency) rating, which instantly cuts your monthly energy costs down to size.

Short Cycling

Short cycling is when your heater turns on and off in short bursts. It might not seem like a major issue because your home might still be warm, but this is both a sign of damage and a major cause of faster wear and tear. 

It’s usually a sign that your system is overheating, or your heater exchange is failing. Either way, it might also be a sign that it’s time to invest in a new unit.

Uneven Heating

Are you used to some parts of your home being warmer than others? That’s a red flag. You shouldn’t have to constantly babysit the thermostat just to feel comfortable. This is often a sign that your unit is struggling to distribute air properly and could warrant upgrading to a new heater.

Upgrade Heating Equipment with Expert Installation from Sigma Air Heating & Cooling

If your system is older or needs constant repairs, it’s time to consider a heating replacement. Sigma Air Heating & Cooling offers installation services for both commercial and residential properties. 

We also offer to beat any written quote within 30 days by 10%. That’s our Sigma Savings Promise. Our technicians work with preferred equipment brands like Daikin, Goodman, Trane, and Carrier. Your heating system is in good hands, regardless of the make or model.

Reach out to us today to schedule your heating appointment, including same-day or next-day service options.