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How to Tell When It’s Time to Call for Emergency HVAC Repair

Published on: December 30, 2025

air conditioner warning

Many different issues can affect your home’s heating and cooling systems, some more urgent than others. While you should always contact an HVAC repair company if you notice something wrong, some situations call for a rapid response. Here are some signs that you need emergency HVAC repair.

Complete Loss of Cooling or Heating

Inconsistent temperatures or poor distribution throughout your home are serious issues but don’t pose an urgent threat. That’s not the case when your cooling or heating goes down entirely. If your system isn’t working at all, you need emergency HVAC repair.

Going without cooling or heating during extreme temperature events poses immediate health risks to you and your family. You can also find yourself dealing with an increased risk of mold on hot and humid days or pipes freezing during harsh winters. That’s why 24-hour emergency service is critical to protect your home.

Any Sign of Gas Leaks or Carbon Monoxide

When dealing with a gas furnace or other appliances, any gas leaks are an immediate concern. If you notice the distinct rotten egg smell of a gas leak, you should leave the area, call emergency services, and then reach out for emergency HVAC repair.

This also goes for carbon monoxide. Any home with gas appliances should have a carbon monoxide detector. If it goes off, exit your home and call for emergency HVAC services right away. Carbon monoxide exposure is serious, leading to more than 14,000 hospitalizations each year.

Why Is an HVAC System Making Noises?

If any strange noises have suddenly started, you should turn off your system and call for repairs. There are many mechanical components in your HVAC system, and if they’ve come loose, they can cause grinding, clanking, squealing, or other sounds indicating further damage.

These noises could indicate relatively minor issues, but they’re likely to get worse if you don’t act quickly. Buzzing or whistling noises can also point to electrical or refrigerant problems.

Restricted Airflow

Have you noticed that there’s not much airflow coming from your vents even when your system is on? This can indicate a variety of issues, such as blocked air filters, damaged ductwork, or problems with the cooling or heating system itself.

You should act quickly to deal with this problem, or you could find yourself with a complete breakdown. This can also lead to issues such as your furnace overheating, as heat isn’t being taken away and distributed quickly enough.

Why Is an HVAC System Tripping the Circuit Breaker?

Is your HVAC system tripping its breaker every time it turns on? This is a sign of a serious electrical problem that can damage your system and increase electrical and fire risks. There could be shorted wiring or mechanical issues with the fan motor or compressor. Protect your home by getting repairs sooner rather than later.

Get Emergency HVAC Repair in San Antonio, TX

Have you found yourself dealing with any of these situations? If so, don’t hesitate to reach out to Sigma Air Heating & Cooling for emergency HVAC repair. We provide same-day or next-day service for a full range of HVAC problems. Schedule service today to get started.