According to the Centers for Disease and Control Prevention (CDC), Americans spend 90 percent of their time indoors. When indoors, irritants and allergens can trigger asthma and other medical problems.

That’s why your heating and cooling system, or HVAC system, should always be functional. Also, it’s important to ensure that your indoor HVAC devices have health and safety features to reduce air pollutants and maintain your comfort level.

However, HVAC problems arise that can compromise your health and comfort. When this happens, you need the help of professionals. The question is, “how can I prevent these problems from happening so I can avoid days without my functioning HVAC?”

Here are signs you need to watch out for that would warrant needing an HVAC contractor:

Strange Sounds and Odors

Consider any odd sounds or smells coming out from your air conditioner or heater a red flag. For instance, a burnt smell would mean a problem with the electrical wiring, while a musty smell could indicate a mold issue.

You also need to watch out for strange noises, such as:

● A high-pitched whistling could be brought about by blocked ducts or clogged filters.

● Damaged fan blades would usually cause a metal clanging sound.

● A rattling sound would mean broken hardware.

● A humming or buzzing sound could be a sign or a failing capacitor or motor.

● Loud pops could mean improperly sized duct or clogged air filters.

If you notice any of these strange sounds or odors coming from your HVAC system, it’s high time to contact a trusted, reliable, and experienced HVAC contractor, like E&V Energy, to help find the root cause of the problem and address any HVAC emergency situation.

Frozen Outdoor Unit During Winter

If your entire outdoor unit is covered in ice and the frost don’t go away, it may cause undue damage to your HVAC machines. This means a longer defrost cycle, and your machine may eventually fail to operate.

A frozen outdoor unit could be due to a low refrigerant charge or a bad fan motor, too. That’s why you have to contact an HVAC contractor to solve this problem and avoid major problems from occurring.

Clogged Condensate Line

The majority of HVAC service calls are due to air conditioning leaks. While AC leaks are generally minor, neglecting this problem may cause serious water damage.

A clogged condensate line is one of the most common causes of AC leaks. Algae, dirt, and rust may develop in a condensate line, so excess water-remains will usually result in dampness, leaks, and mold buildup.

Regularly cleaning the condensate pipe is important and an annual HVAC maintenance will ensure that your AC system is in good working condition.

If you’re unsure how to clean your AC, you can watch video tutorials online or call an HVAC professional to help you.

Unusually High Electricity Bills

If your HVAC system is not in good condition –not working properly – you’ll notice sudden spikes in your electricity bills. A failing AC could be the culprit if you have an outdated or failing unit. As a result, you might need a new and energy-efficient air conditioning system.

Instead of constantly paying high energy bills, you should practice annual HVAC preventive maintenance checks and save more money in the long run. Contact a professional HVAC contractor to help you check your HVAC and address any issue that might cause high energy expenditure.

AC Not Cold As It Used to Be

Your children might appear irritated or uncomfortable in their bedroom or playroom if your HVAC has a problem. Unlike adults, young and school children have sensitive skin and thermoregulating systems, so they can easily notice if there’s a sudden change in temperature.

Even the elderly or seniors feel restless if they notice temperature changes, most especially if the room is uncomfortably warm. Children and the elderly are vulnerable to temperature changes, so you need to ensure that your HVAC is always in working order.

If you notice your AC not emitting enough cool air, there could be problems with the air filter, refrigerant, or the AC components. An HVAC specialist can assess if your AC would need to be repaired or replaced.

Electrical Issues

Your circuit breaker may trip when your HVAC system is not running properly, which can cause electrical problems, too. If you notice any electrical problems, shut the system down and call an HVAC contractor right away.


If you notice any unusual signs, like odd smells and noises from your HVAC, or electrical issues, you should consider these signs as HVAC emergencies. You need to call an HVAC contractor to rule out the problem.

Clogged condensate lines, unresponsive units, and frozen outdoor units should be addressed promptly to avoid major HVAC problems that would increase your electricity bills.