Let’s talk about the Janitor heater troubleshooting for a moment!

System malfunctions and problems are not fun. 

Whether it is your car or the heating system, Janitrol heaters will definitely kick you out of your comfort zone.

It affected me BAD when my heater broke down at the most inconvenient time.

And even more frustrating is that Janitrol heaters come with high repair costs. So you better learn how to troubleshoot yourself because I did —though I had some help from an expert. 

The point is:

You could save money and time by replicating what has worked for me instead of calling an HVAC Pro or technician. 

So let’s get handy! 

5 Janitrol Heater Troubleshooting Tips

1. Inspect The Power Supply

The first thing first is to ensure your Janitrol heater is getting power. The power cord should be firmly plugged into an electrical outlet before doing anything else.

Look for any apparent damage or loose connections on the cord. It is a sign that the power supply works properly if other electrical appliances nearby are functional.

This step is important because it rules out the possibility that the heater isn’t working correctly due to a simple power-related problem.

2. Check That Your Thermostat Is Set To Heat

The thermostat is essential for managing how your Janitrol heater operates. Before troubleshooting, ensuring the thermostat is set to the “heat” mode is crucial.

Locate the thermostat first. Then ensure it is turned on and showing the temperature. Verify that the thermostat’s mode or function settings are set to “heat.”

Some thermostats have a separate switch or button to switch between the heating and cooling modes, while others may require you to go through a menu.

3. Replace The Filter

Your Janitrol heater’s air filter ensures smooth airflow and shields the internal parts from dirt and debris.

Your heater’s efficiency can be decreased due to a dirty or clogged filter that, over time, prevents proper airflow.

Locate the filter within the heater and replace it. The precise location and replacement procedure are detailed in the manufacturer’s instructions.

Also, check for dirt and debris buildup. Carefully remove the old filter. Replace it if it seems dirty or clogged.

4. The Gas “MUST” Be On

If your Janitrol heater runs on gas, you should confirm it has enough supply. Moreover, the heater won’t be able to generate heat without gas.

Find the gas supply valve; it’s usually close to the heater or the gas meter. Verify where the valve handle or lever is located. The gas supply is cut off if it runs parallel to the gas pipe.

Hence, rotate the lever or handle to a perpendicular position to activate the gas.

5. Examine The Ventilation System

Proper ventilation is essential for your Janitrol heater to operate safely and effectively.

The exhaust flue and air intake vents part of the ventilation system make it easier to exchange air and eliminate combustion byproducts.

Inspecting the ventilation system ensure there are no obstructions or blockages. Look for debris in the air intake vents and the exhaust flue, such as leaves, dirt, or other objects that may obstruct airflow.

You can also check out the full review on HVAC Pro.


 Frequently Asked Questions

Why Is The Air In My Janitrol Heater Weak?

If you notice weak airflow coming from your Janitrol heater, there could be a few reasons for this issue.

One common cause is a clogged or dirty air filter. 

Over time, dust, debris, and dirt can accumulate in the filter, restricting the airflow and resulting in weak air output.

Another possibility is a malfunctioning blower motor or fan.

 If the motor is not working correctly, it won’t be able to push the air with sufficient force, leading to weak airflow.

Why Is My Janitrol Heater Making Unusual Noises?

Identifying the underlying cause of any unusual noises coming from your Janitrol heater is critical. Several things could cause these noises.

One major cause is that a heater component, such as a fan blade, belt, or motor, has become loose or worn out due to repeated use.

Another potential cause of the rattling or banging sounds is a broken or malfunctioning heat exchanger.

How Often Should I Clean The Air Filter In My Janitrol Heater?

Cleaning schedules are influenced by the environment and usage, among other things.

Generally, cleaning or replacing the filter every one to three months is advised. However, specific situations call for more frequent cleaning.

For instance, more frequent cleaning might be required if you live in an area with high dust concentrations, pet dander, or pollutants or frequently use your heater in the winter.

Why Is My Janitrol Heater Not Turning On?

There could be several reasons why your Janitrol heater isn’t turning on.

It’s essential to check the heater’s power supply first. Check the heater’s associated circuit breaker or fuse box to ensure it receives electricity.

 If the power supply is not the issue, your thermostat might be. So confirm that the thermostat is set to the appropriate temperature and operating mode.


Janitrol heater’s troubleshooting is an easy task that anyone can perform and doesn’t call for advanced knowledge —in most cases.

Anybody can successfully recognize and fix common problems with a basic understanding and a few essential tools.

However, the top priority during the troubleshooting process should always be safety; it is crucial to address it.

ALWAYS adhere to the manufacturer’s instructions and recommendations for a safe and efficient solution.

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