How Do I Know If My Air Conditioner Fuse Is Blown?

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Summer is here, and you’re ready to soak up the sun! Of course while inside, you want to be nice and cool. Of course, the first heatwave of the year is usually when air-conditioners decide to stop.
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As upsetting as it is to have your air conditioner stop working, there is no need to panic. Many times it is an easy fix. In this article, we will consider one of the most common causes of an air conditioner unit to stop working: a blown fuse.

What Is An Air Conditioner Fuse?

The first step to diagnosing your air conditioner fuse is to understand what it is. The purpose of a fuse is to protect an electrical unit.
A fuse has a fragile metal bridge inside that is designed to melt at a specific temperature. When it melts, the electrical current can no longer pass through it, and therefore the unit does not work correctly.

The blown fuse keeps the unit safe when something makes the temperature rise to an extreme that would otherwise damage it. So, instead of having to replace the entire unit, all that has to be done is to replace the fuse.

A simple power surge may blow a fuse; in this case, replacing it will have your air conditioner up and running immediately. Sometimes, however, the blown fuse is the result of an underlying problem, and it will blow again. At that point, the best thing would be to call a professional to diagnose the system.

How Do I Know If My Air Conditioner Fuse Is Blown?

The process of diagnosing your air unit is not complicated. However, in order to perform the diagnosis, you will need at least a basic knowledge of electricity and some basic tools.

Your unit obviously is not blowing cold air; the next thing to check is the external unit itself. Is it doing anything?

If the fuse is blown it should only give off a slight humming sound. This is caused by the electricity being sent to the unit. However, since the fuse is blown, the electricity does not continue. Therefore the unit does not do anything but produces the low humming sound.

The most simple way to proceed would be to change the fuse directly. Fuses are not that expensive, so it may be worth considering buying one. If the problem was not a blown fuse, you will have an extra fuse for when it does eventually blow.

The other option is to remove the disconnect box and check the fuse with a voltmeter. If you do not know how to do that, the best thing would be to contact a local electrician or HVAC company since working with electricity can be dangerous.

Conclusion

Now you have a basic understanding of air conditioner fuses and how to perform a basic diagnosis. If you are handy, you can save some money by performing the task yourself. However, even if you decide to call in a professional, at least he will respect your knowledge of the unit.
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