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Electric heater not working: 6 causes and solutions

Electric heater not working: 6 causes and solutions

Electric heater not working is one major problem experienced by many homeowners who use this device for their comfort at home. An electric heater is an essential appliance in the winter months which is very useful in cold countries. The electric heater is used to heat a room and this provides comfort and coziness. These heaters are of different types such as wall-mounted, portable, and others.  No matter the type, the electric appliance may develop a fault and stop working for a number of reasons. If this occurs, then it is important to first understand the main problem and then find a suitable solution to the issue.

However, there are certain problems with electric heaters that you can solve on your own, whereas others may need to be left for a professional to handle it. Below are some of the common causes of an electric heater not working again? Continue reading to know how the problems can be solved.

Is Your Electric heater not working Again? don’t panic!

  1. Check the power sources

an image showing a circuit breaker

CAUSE: The common cause of electric heater not functioning or turning on again is a problem, which is mostly related to the power supply.

SOLUTION: Use a voltage tester to ensure that the power is available from the main supply. If yes, proceed to check the power switch and ensure that it is not faulty. This can be achieved by connecting another power device to the switch and observing whether it is working. If yes, then there is a problem with the power switch and it needs to be fixed.


  1. A Blown fuses

an image showing a blown fuse

CAUSE: Another most common cause for the electric heater not working is when the fuse is blown. 


  • To inspect this, first, unplug the device from the power supply and check the fuse box of the house for damage or blown fuses as well as tripped circuit breakers.
  • If it is a blown fuse or tripped circuit breaker, then what you need to do is replace the fuse or reset the circuit breakers if required.
  • Now plug the electrical appliance back into the power outlet and switch it on.
  • Check if the problem has been solved. If not, the following points below might be useful.


  1. Auto safety shut off

CAUSE: Another reason for the electric heater not working may be due to the auto safety shut off feature in the electrical device, which is provided in several heaters these days.  When heaters become too hot, then this part of the appliance shuts off the device for safety purposes. It could be because of this feature your heater may not be working again.


SOLUTION:  what you need to do is to reset the feature by pushing the power switch to the off position if the device does not turn back on. Unplug the device from the power supply and let it become cool down for 10-15 minutes.  Plug it back to the power outlet again and turn the switch on. It should be working perfectly, but if it is not working, the thermostat might be the problem.


  1. Check the thermostat

CAUSE: In most cases of an electric heater not working, the fault could be with the thermostat being bad. It may either gone loose, be stuck, or may have become faulty.


  • Inspect the thermostat and check which level it is set at. If it is set to an off position or a low-temperature level, try switching it on to a higher temperature level. See if it starts functioning again.
  • However, you need to keep an eye on it to be sure that it doesn’t stop functioning due to auto safety shut off feature that is in the device.
  • However, in some cases, the thermostat dial may be stuck or become bad; because of this reason, the electric heater may not work or generate sufficient heat.
  • Check the thermostat and if possible should be replaced by contacting a professional technician.

what this youtube video from repairclinic and learn more


  1. Problem with the electric cord

CAUSE: Another thing that may cause electric heater not working again could be an issue with the electric cord. An electric cord may become faulty and could stop working which in turn affects the functionality of the electric heater.

SOLUTION:  Ensure you check the power cord for any breaks. It must not be torn or damage from anywhere in between.


  1. Problem with the heating element

an image showing heating element

CAUSE: Another major possible cause for the electric heater not working is heating element gone faulty or bad

SOLUTION: To inspect this issue, you will need to test the continuity of the heating element inside this device. This can achieve by following the steps below:

  • Turn off the electric heater and unplug the device from the power supply from the main supply.
  • Disassemble the device to access the heating element and set the multimeter to RX1 or resistance times 1 or continuity range
  • Now place the probes of the multimeter to each end of the heating element of the electric heater
  • If the meter indicates high resistance then this means that the heating element is fine, but if the reading is showing infinity then this means that there is a problem with the element and it is faulty.
  • In this case, it needs to be replaced with the same size, shape, power rating.


Now that you have come to know the main reasons for the electric heater not working as well as the various solutions for all the common problems, you can repair your heater on your own. However, if you are unable to find the cause and hence the solution, you must contact a professional. 

This may also interest you:

>6 common problems with microwaves

>5 Simple Electrical Repairs for Your Home

>Electrical Outlet Not Working? Try These Simple Fixes

>11 Important Tools For DIY Electrical Task


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