Does your space heater keep blowing fuses? You might have a bad case of overheating. Here’s why.

Space heaters are simply amazing. They make our everyday lives easier by providing us with a steady heat source, and making our rooms cozy for long, restful nights.

I can’t remember the last time I didn’t have my trusty appliance with me. Sometimes, I wonder if I can still sleep without it.

Now, before you close this page because you think I’m trying to sell you on a new model, wait. I’m just trying to help you. If you’re here, you already own a space heater, and, for whatever reason, it keeps blowing fuses.

I had this happen to me not too long ago, so trust me when I say that I understand your frustration. I had to do a lot of research, and undergo a tedious process of trial and error before finding the solution to my problem.

I didn’t have anyone to help me. But you do.

I want to share the knowledge I acquired during this process, so you can get your space heater working again soon.

Below you will find a list with the most common causes to this occurrence, and simple steps you can follow to fix them. I promise that, if you bear with me and remain patient, we’ll get to the bottom of this in the blink of an eye

Ready? Let’s go!

Fixing a Troublesome Space Heater

When essential household appliances fail, we can get desperate and start looking for answers everywhere. And while this might be acceptable for other aspects in life, it’s not so for a troubleshooting process.

Prying your space heater open immediately is a terrible idea, as you could not only waste precious time, but also risk doing further damage to the unit.

Let’s not get ahead of ourselves.

Here are some factors that could be causing your space heater to keep blowing fuses:

  • A Faulty Outlet
  • A Broken Power Cord
  • An Inaccurate Thermostat
  • A Dead Heating Element
  • A Fried Circuit Board

#1 A Faulty Outlet

One of the main reasons why your space heater might keep blowing fuses, is due to electrical overload.

There are many factors that can cause this, but among the most common ones is a faulty wall outlet. The problem with this malfunction is that it can be tricky to diagnose, and easily mistaken for overheating or short-circuiting.

Depending on how damaged the outlet is, it might be supplying no electricity to your appliance. But if it’s only partially faulty, it could be sending bursts of electricity to it, which could eventually cause permanent damage.

If you suspect this to be the reason why your space heater keeps blowing fuses, it is of the utmost importance that you stop using it until you test another outlet.

Solution: Relocate the heater.

Sometimes we get too comfortable with a specific outlet and use it all the time to power our appliances. Normally, this is not a problem, but in this case, I suggest you try a different power source.

First, carefully unplug your unit, and let it cool down completely. Once you’ve done that, take it to a different section of your house, and plug it back into another outlet. Preferably, as far removed from the one you normally use, as possible.

Assuming that does not resolve the issue, read on. We still have a lot of options.

If you want a DIY challenge, and own a multimeter, you can use it to test the suspicious outlet for continuity. This is not mandatory, but it could help you rule out the possibility of there being something else wrong with your home’s wiring.

It’s best to nip these kinds of things in the bud.

#2 A Broken Power Cord

person holding power cord over wall outlet
You can always opt to change the power cord if it’s broken or damaged

Okay, so your outlet is fine. What now?

We check your power cord.

If you’ve ever stripped one of these cables, you know that inside their rubber housing, there are several smaller cables which make them up, and carry the electricity from the outlet, to your machine.

These are built to last, but they’re not in destructive.

Sometimes, apparently unimportant bad practices, such as keeping your power cord stored away improperly, tangled, or pressed against a wall in a sharp angle, are more than enough to cause permanent damage to it.

Just as it happens with your wall outlet, depending on the severity of the damage, you could either be getting no electricity, or intermittent bursts.

Solution: Replace the cord.

I don’t want you spending money unnecessarily, so, if you have another cable that meets the same amperage and voltage requirements as the broken one, please use it to test whether this is the problem.

If you’re lucky, the testing cable will work, and there’s nothing else to do.

However, assuming that you don’t have the spare cord just lying around, you can find a replacement at any online marketplace by Googling your heater’s make and model.

It should not cost you more than $30.

#3 An Inaccurate Thermostat

The accuracy of this component is crucial.

In case you’re not familiar with what it does, let me briefly explain. Your thermostat is responsible for detecting and regulating your space heater’s internal temperature. Without it, your machine would not be able to stay at your desired temperature settings.

If your space heater keeps blowing fuses, there’s a very good chance that this part is malfunctioning, and failing to sense when the unit is getting excessively hot.

This can prompt your thermal fuse to constantly “blow” as a countermeasure to the aforementioned extreme conditions.

Solution: This process may vary from model to model, but the broad strokes should be the same for all of them.

  1. Carefully unplug your appliance, and let it cool down completely
  2. Turn it around, and undo the screws holding the back panel wall in place
  3. Remove the wall panel to expose the unit’s guts
  4. Locate your thermostat, and gain comfortable access to it
  5. Use a multimeter to test it for continuity

Should you get null readings on the meter, the part is dead, and needs to be replaced as soon as possible.

#4 A Dead Heating Element

a broken heating element
A faulty heating element could damage your appliance permanently due to excessive heat

Assuming your thermostat is not the problem, let’s check out your heating element.

As you probably know, this part is what creates the heat that allows your space heater to increase your living spaces’ temperature. It works by transforming the electrical energy drawn from your wall outlet, into heating energy.

In most cases, when this part is dead, it should not generate any heat. However, it’s also possible for things to go the other way. On some rare occasions, a bad heating element could generate excessive heat, subjecting the unit to abnormally high temperatures.

This would explain why your fuses keep blowing, as that’s the preprogrammed reaction when there’s overheating present in the machine.

It is of the utmost importance that you replace your heating element as soon as you suspect it to be faulty, as putting this off for too long can have dire consequences

Solution: Please follow the steps from the previous point to gain comfortable access to your heating element, and test it for continuity.

Should the part be dead, you can easily get a replacement from either your nearest hardware store or your manufacturer.

#5 A Fried Circuit Board

A damaged circuit board is most of the time due to extreme overheating

If none of the solutions above have worked for you, there is a very good chance that your circuit board is fried.

This part is your space heater’s heart and soul. It is responsible for making sure all the other internal components communicate, and do their jobs.

A fried circuit board is often the result of extreme overheating, or a large power surge caused by a blackout. And while there are many countermeasures built into your unit to prevent this from happening, it will, unfortunately, always be an unwanted possibility.

Having this problem would explain why your fuses blow constantly, as there is a general malfunction within the space heater.

If this is your case, I’m sorry to say that, short of buying a new machine, you’re out of options.

Solution: This one’s a bit tricky. You’ll have to bring out your appliance’s documentation, and make the decision from there.

Please read on to determine whether it’s time to call someone.

When Should You Call a Pro?

The answer to this question will depend greatly on the status of your warranty and whether the solutions above worked for you.

If you’re still under coverage and don’t mind waiting a couple of days or weeks for your manufacturer to send a technician to your home, by all means, go ahead and call them.

Unless specified otherwise on your documents, they should take care of the repairs for free.

Assuming that your warranty has expired, you’ll have to weigh the cost of repairs vs the cost of buying a new space heater. Replacements parts, such as a new circuit board are not awfully expensive, but the cost of labor to have them installed and configured, can be.

As a general rule, paying for repairs that equal 50% or more of the price of a new machine with similar features, is a bad investment.


To have your space heater keep blowing fuses can be… frustrating, to say the least. Not only are you stuck with an appliance that keeps malfunctioning, but also in the unfortunate position of having to figure out what the problem is, and finding a way to solve it.

What a disaster.

Luckily, as I hope you’ve learned in this piece, addressing most of the causes behind this situation is fairly simple, and not very time-consuming.

In most cases, double-checking your power sources, and quickly replacing a faulty component, is all you need to do to go back to enjoying a warm and cozy environment.

Thank you so much for sticking with me all the way to the end. If you found this article useful, you’ll be happy to hear that we have a myriad of other incredible resources below.

Why not check them out?

I wish you all the best!