Your HVAC system can fail you at the most unpredictable times. But then, there's never been a good time for an HVAC system to stop working. All that we can all agree on is that a breakdown in the winter is the worst. Being left without heating at a very cold time of the year isn't a desirable experience.

While you can call an expert to diagnose and repair your broken system, there are a few DIYs that you should know. Knowing how an HVAC system works can help you do some basic repair and ensure it runs smoothly. This article has some troubleshooting tips that you need to know.

Read them below.

1. Try Resetting Your HVAC System

The first thing to do if your HVAC system isn't working is to reset it. You do not have to know the problem with the system at this stage because resetting it can solve a wide range of issues. The reset procedures may vary from one system to another, making it vital to check the user manual.

A wrong reset procedure could lead to further damage to the system. If your system didn't come with a user manual, the internet would be a great resource for you. Search for the reset process on the particular type and model of HVAC system you're using to be sure.

2. Check Filters and Replace Them When Necessary.

The air filter is key in maintaining the quality of the air you breathe in your home. It clears mold, dander, dust, etc., from the air that circulates in the system. But the fact that it runs all day makes it susceptible to the buildup of these elements that eventually affect the entire system.

Soon, the system may start experiencing malfunctions, becoming inefficient. The airflow may also get blocked, and reduce the quality of air in your home. 
Experts recommend checking the air filter every month. Shine a flashlight on one side and replace it if you can't see the light on the other side.

3. Check Furnace and AC Wires

Sometimes what's ailing your AC is a faulty wire somewhere. 

Outdoor HVAC systems experience more wiring issues than indoor systems because of their environment. For instance, you can affect outdoor wiring while using landscaping equipment for routine groundwork in your compound.

You, therefore, need to check if any exposed wires are damaged if your system fails to start. However, you need to carefully handle the wires as they carry the risk of electric shock. You can also call in an electrician if you feel that handling the wires yourself won't be safe.

4. Check Supply and Return Ducts for Obstructions.

Ducts are important in HVAC systems, and their failure can affect how your system runs. Your HVAC system won't work well if the ducts that allow air in and out of the system are blocked. 

The best thing to do is ensure that all registers in your home are open, which is an easy fix.

Knowing that the ducts aren't working is easy. If your thermostat is working, but you can't feel any air flowing in your home, then you have a duct issue. 

A more serious issue with ducts is when they get blocked with dust, dirt, and other debris. This guide can be helpful for you to understand duct cleaning better. It also gives you a better understanding of the importance of cleaning your ducts.

When things get a little too complicated, it’s important to call an expert. They would be able to professionally clean your ducts and check your system for other concerns.

5. Make Sure Your Furnace Door is Closed

Sometimes there could be no problem with your HVAC system, but it doesn't seem to work. There are some easy fixes that you must try before you even think about its technical aspects. 

One of the things you need to check before anything is the furnace door.
Certain types of HVAC systems cannot run with their furnace doors open. Your system could be among them, so it will be best to check the door. Open it and shut it again even if you feel that it is closed. Then confirm if it is tight enough before you start the system again.

6. Make Sure the Thermostat is in Proper Heating or Cooling Mode.

The thermostat comes with a user-friendly control board that makes it easy to operate. This control board comes programmed with factory settings meant to control heating and cooling in your home. But then, the settings it comes with may not be suitable for you.

Your home may sometimes feel extremely hot or cold, making it difficult to stay there. Your next course of action should be confirming that the thermostat is in proper heating and cooling mode. Change the settings to ensure it is working at peak efficiency.

7. Replace Thermostat Batteries.

Many HVAC issues originate from the thermostat, making it one of the first things to check if your system fails. For instance, a battery-powered thermostat may not turn on if the batteries are dead. Or, you could be using a type of battery that isn't recommended for your system.

Changing the batteries before you attempt anything is the right thing to do, even if you think they're working. Please do not rush into doing any fixes in this guide before checking the batteries, as they're a simple fix. The DIY tips contained here will help you solve simple issues such as anything to do with your system’s battery.

8. Make Sure Breakers, Switches, and Disconnects are in the 'ON' Position.

The issue with your HVAC system could also be a breaker, switch, or disconnect that's turned off. There are several reasons why these safety switches may trip and go off. It could be as a result of damaged wiring, faulty appliances, defective switches, etc.

 It would be best if you first established what could be causing them to trip and go off. If it is a fault with the system, make sure you hire an expert to check it out, as diagnosing a system issue requires expert knowledge. Broken switches need to get replaced as soon as possible too.

Conclusion

You don't always need an expert to maintain your home's heating and cooling system. You can use the insights in this article to maintain your HVAC in perfect condition. But then, it is also vital to know when you need to call in an expert HVAC system technician.

Guest Contributor: Daniel M