Repair it myself.

If it is not working, repair it yourself, save time, money and headaches with these tips to trouble shoot your HVAC system.

If you are a do it yourself person then this is for you. Diagnosing the systems problem on your own can be easy. These steps are basic steps as a guide to help you along. When a heating and cooling company goes through your system, they follow guidelines as well.

Warning. If you are not confident in doing it yourself, please contact a Heating and cooling company.


How to check your HVAC system.

  • Shut the power off

You need to power down the entire system. Go to the plugin closest to the system and pull the plug. You will want to make sure the system is actually off.

  • Contactor check

With the system verified, that it is off, check your connections. A contractor is on the list of common repairs. Check the wires and make sure they still have good connections. IF it is loose, undo the wire, replace it back in the spot with a better connection, and screw it down.

  • Motor Fan

If you notice the fan is having troubles, you can replace that as well. Loosen the setscrew then pull it off the shaft. Replace with the new motor. Secure wires off the old conduit

  • Fuses

You want to check for any amount of current. Many people turn voltmeters way down to the lowest. Place black and red on opposite sides of the fuse. A numbered reading will indicate a good fuse.

  • Capacitor Replacement.

Capacitors do not last forever. Ordering a new one is not the worst idea. Before you remove the old one, make sure you get a drawing of how it looks. You want to make sure its installed the correct way.

Sometimes you can change the filter; this filter can cause problems when it is dirty. The system will overload on power and turn its self-off. Check to see if ice formed on the coils.


  • You should check the thermostat to make sure it is set to heat.

Looking at the thermostat it should be set to on. In addition, you need to make sure that it is set to heat. If you think it’s hot you may need to adjust the temp on the thermostat to kick the system on.

  •  Checking the filter.

    This is what you breathe in.

I have to say this is the most common cause of furnace problems. The filter gets dirty. So imagine breathing through a straw, it requires you to breathe a lot harder and you start panicking because you are not getting enough breath. Well, the furnace will work the same way. You should change the filter monthly. Do not cheat yourself by using cheap filters. If you spend a little more on the filter, it will help in the end.

  • Power

You will want to check your circuit breaker. Sometimes they are tripped. If the system had an influx of air, it could cause it to kick off. Also, check the on and off switch on the system itself. This is an important step; if you have kids, you should do this first. Kids are adventurous and they like to touch the stuff.

  • Repeat the step before and listen for the sound of a spark, next clean your furnace flame sensor.

Listening for the spark will let you know if you are onto something. Clean your furnace flame sensor, they get dirty fast.

  • Loose wires.

Loose wires are an easy fix. If you see a loose wire grab a screwdriver and make sure, you tighten it down. If a wire is frayed or burnt, you need to figure out why that is.

  • Dust and Dirt.

Take the front plate off. Sometimes it will require a screwdriver to take it off. Once you get the face plate off you can get to cleaning. Just like every other part of your home, it will accumulate dirt and dust.  Using a flashlight will help you see spots that really need to be cleaned.

  • Flush drain lines.

You would be surprised at the amount of water a high-efficiency furnace can drain. Check for any restrictions in the lines. You will look for dirty particles along the line. You can use bleach and water to flush the lines.

  • Blocked or leaky ducts

One room is hot, the other is cold you can repair it. Check your registers to make sure they are open. Looking along the ductwork is hard in newer homes. You can start at the furnace; follow the ductwork from beginning to as far as you can. Use a flashlight. If you see a spot that is questionable. Use some soapy water to see if it has a hole. You can also use your hands to feel the air.


Make sure you have the right tools for the job.


Live Healthy Live Happy


Leave a Reply

Your email address will not be published.