Optimus Heater Troubleshooting [9 Easy Solutions]

Whether you have an Optimus electric heater or Optimus dish heater, you need to know about Optimus heater troubleshooting. This is because you can face many problems like the heater not turning on, the fan not working, the heater keeps shutting off or not heating, a faulty heat sensor, fuse issues, remote control problems, and more.

The advantage of reading our heater troubleshooting guide is that you can easily solve these Optimus heater problems by yourself without calling out for professional help. So, let’s get started on the main discussion.

Optimus Heater Troubleshooting [9 Easy Solutions]

It can be problematic if you don’t know the reasons and solutions when your Optimus heater stops working.

Here to minimize your struggle, we have come up with the reasons and solutions to various Optimus heater problems. Check the below guide for details.

1. Heater Won’t Start

There are several reasons for your Optimus heater not turning on. The faulty and low power supply is the major one among them. There may be a melted power cord, blown fuse, or damaged wires. 

Also, we can’t ignore tripped breakers in this case. Sometimes, a faulty thermostat or wrong temperature setting into it, a blocked air filter, or defective entire major elements will not let the heater turn on. 


  • Start by checking the power supply. Ensure the excellent power cord and the switch is working.
  • Also, check the visible wires and replace the damaged ones. Tighten the loose wires.
  • Now, verify that the switch is snugged with the socket tightly.
  • In the case of a tripped breaker, you need to reset it. If needed, replace the breaker.
  • Then, come to the heater air vents. If it is too dirty or blocked, don’t get late to clean it. It will ensure sufficient airflow.
  • Finally, check the thermostat. Ensure this element is well-working. Set the temperature correctly. 

2. Heater Keeps Turning Off

It’s the most common problem of all space heaters. Before moving through the solution part, let’s have a glimpse of the main reasons for causing your heater keeps turning off.

  • Faulty power supply
  • Tripped circuit breaker
  • Blocker air verts 
  • Lack of air flowing
  • Activated safety protector
  • Defective thermostat

Now fix the problem by following the steps below:


  • First, turn the heater off and disconnect it.
  • Then, ensure the proper power supply of the heater. Measure the voltage or wattage of the heater. Note that 1500 Watts (W) or 1.5 kW is perfect for the heater’s fluent operation.
  • Go to the circuit breaker. If you find any tripped switches there, reset them ASAP. 
  • Verify all the wiring of the heater is well working.
  • Ensure proper cleaning process of the heater, especially the air vents. Unblocked the vents perfectly. It will increase the airflow and the durability of the heater.
  • Don’t miss the thermostat. If required, inspect it for thorough checking. You need to replace the broken, melted, damaged thermostat.
  • Finally, if you see that the red caution light is turned on, be sure the safety protector is activated to prevent overheating damages. In this case, simply reset the heater. 

3. Heater Fan Not Working

The main reason behind the heater fan problem is the faulty wiring. defective, short-circuited wires stop the fan function.

Also, wire disconnection from the fan, loose connection, faulty switch, and the defective fan motor will stop the fan’s normal working. 

In some cases, dirty fan blades and blocked air vents surrounding the blower are obstacles to fan operation. Anyways, here are solving steps that will help you surely:


  • First, turn off the heater and disconnect it.
  • Check the power cord and switch. You need to replace it if you find any faults here.
  • Now, inspect the fan cover and carefully check the wires of the fan. If there are any loose wires attached to the fan, tighten them. Also, replace all worn-out wires.
  • Remove the blockage from the air vents perfectly.
  • Don’t miss the blades of the fan. Clean it first and remove the obstacle from it. Then verify that it is well-moving.
  • Sometimes, the thermostat is the main cause. Verify the set temperature is higher than the current room temperature.
  • Finally, leave the heater in the off position for some while and turn it back on. It will rest in the theater. 

4. Heater Not Heating

Users often face this type of problem in their units. In some cases, it is seen that the fan is working but there is no heat. Here, the defective heating element may be the major reason. 

In some cases, insufficient power supply, faulty switches, or loose wires will easily trigger this problem.

Also, the malfunctioning of the thermostat is the major reason. Anyway, follow below step-by-step guide to break down this issue:


  • First of all, check the power supply. There should be adequate voltage, a perfect switch, and a power cord.
  • Tighten the wires and, if needed, replace the damaged ones.
  • Now, inspect the heater and find out the faulty elements there. As all the parts are quite sensitive, you have to do it very carefully. Contact the manufacturer in the case of replacing defective elements.
  • Finally, check the thermostat. Change batteries if required. After that, set the temperature up to 2 or 3 degrees higher than room temperature.
  • Besides these, ensure the proper installation of the thermostat. 

5. Faulty Heat Sensor

There is a round heat sensor at the top of the dish heater, situated just above where the heating elements are.

It can be faulty to cause your heater to rotate without any heat being produced and the alarm signal lights up.


To solve this, you need to take the back of the heater off which is the portion with 3 screws holding it to the back of the heater and you need to expose a few wires. 

Connect the white wire which you need to remove from the fuse to the set of red wires that are connected by heat shrink tubing.

For doing this, firstly, cut the red wires separately after eliminating the heat shrink connection. 

Now, rewire the red wires back together using a ring terminal. Then, attach the new connection to the post to where the white wire is attached to.

You can bypass the heating sensor and solve the problem by doing this. But as you are bypassing a security feature of the heater, it is a risky solution.

6. Remote Control Problems

At times your Optimus dish heater doesn’t work with the remote that comes with it. However, it will work without the remote. In this case, the remote control of your Optimus dish heater has problems.


To solve this, you need to replace the battery of the remote.

7. Master Switch Problem

If your Optimus dish heater doesn’t work with the remote that comes with it or without it, then there can be a master switch problem.


In this case, you need to turn off the Master Switch on the heater. Then, unplug the heater and wait 12-15 minutes before plugging it back in again.

Now, turn on the Master Switch on the heater and try working it. Hopefully, that time out will provide the Master Switch with sufficient time to reset itself and solve this problem.

8. Heater Wires Problem

If your Optimus heater is old and you have used it a lot, then there can be corroded wires in your heater. As a result, your Optimus heater will not power up.

The wires erosion to the point where they just fall away from where they were connected. It can cause switches to get friable and break apart and thermostats to go bad. 


In this case, remove the cover to look at the ends of each wire. When the ends of the wires look bad, you need to replace them.

Ensure that you use the same gauge or thicker wires with high-temperature insulation. Newer heaters generally have fuses. So look wherever you have not looked before where there is a power wire.

9. Heater Overheating Problem

Sometimes your Optimus heater will flash white light and red light and it won’t work. This problem occurs because your heater is overheated.

A maximum of Optimus heaters have a thermal fuse for protection overheat in case of thermostat issues and failure.

It is situated inside the heating coil place so it can sense an overheating temperature. The thermal fuse might be covered with an insulating material with the thermal inside.

When overheating occurs regularly in the heater, this thermal fuse can get damaged. You need to replace the thermal fuse to solve the problem.

How To Fix The Fuse Problem

Sometimes, there can be fuse problems in your Optimus heater, causing an alarm signal lighting up and no heat is produced but the heater is powered up. 

To solve this fuse issue, you need to find the cover that has three screws which are located behind the reflector. Unscrew the cover and you will see two wires, a red wire, and a white wire. 

A white wire from the terminal goes into a white sleeve and becomes a red wire. Inside the white sleeve, there is a special fuse situated.

Cut out the white sleeve and remove the fuse. Now, cut the fuse with the wires. Connect the white wire to the red wire with electrical tape.

Finally, ensure that wires are wrapped with electrical tape. This way you can solve this problem.

How To Reset Optimus Heater

To reset the Optimus heater, you need to press the reset button. You will find the reset button on the back panel of the heater where the element connection cover is situated with 3 screws holding it.

Remove the element connection cover and press the reset button. After pressing it, the heater will shut down after two minutes.

Then, press the reset button again and it will restart within one minute.


Do space heaters have fuses?

Yes, space heaters have fuses. Space heaters generally have fuses coming with a rated current of 8-15 Amperes, and a rated voltage of 120-240 Volts.

Why is my propane heater not igniting?

If the thermocouple is a long distance away from the flame, it can cause the pilot to go out and not ignite the propane heater. Another common issue behind this problem is a clogged gas pipe. Also, if the propane heater sparks but won’t ignite or stay lit, the gas cylinder that supplies it might be finished or the gas might even be turned off.

Do most space heaters turn off automatically?

Generally, every space heater should have an emergency turn-off in the circumstance they turn over by accident. However, it can vary in various space heaters. Maximum cheap space heaters won’t shut off automatically. Even if you own a space heater with an automatic turn-off feature, you should not depend on its automatic turn-off feature to stay secure.


If you are eagerly wanting to solve your Optimus heater problems, then this Optimus heater troubleshooting guide is just for you. Here we have elaborately discussed the common Optimus heater problems, their reasons, and easy solutions. 

We are hopeful that this guide could help you to fix your various Optimus heater issues. Still, if your problem has not been solved yet, then let us know in the comment box. We will try to solve it ASAP.

Note: You can also read Dyna Glo heater troubleshooting guide.

About William

William is the founder of Fireplacehubs.com. He has real life practical skills in fixing smoker & heating appliance issues. He loves to share his knowledge & helps others in fixing their appliances & saving their money. William firmly believes that anyone can repair his or her unit with the correct guidance & knowledge. See more at about us.

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