VEVOR Diesel Heater Troubleshooting Tips


To go on a trip in freezing months, what is more important than water and food? Of course, a good quality, eco-friendly, and low-maintenance heating gear, particularly a diesel heater.

These heating devices come in handy because they have amazingly low fuel consumption when working in medium power and can increase your vehicle’s temperature to 20 degrees Celsius. If you technically look at it, diesel has a higher energy density than gas, thus becoming an economical choice. Besides, it has fewer emissions that have little to no impact on the ecosystem and the air inside your locomotive.

The only confusion is that there is a lack of authentic guides for maintaining or troubleshooting diesel heaters. So, if you have purchased a VEVOR diesel heater that has been acting up, our article will help you diagnose the issue at least.

Why Does VEVOR Diesel Heater Troubleshooting Matter?

Why does Diesel Heater Troubleshooting matter?

To begin with, you have got hot fuel on your hands here. You have no other option than to be extremely mindful of your van’s heating system. A compromised or ill-maintained diesel heater is a menace to you and your vehicle.

Therefore, it is necessary to self-inspect or summon a technician once in a while to see if your VEVOR diesel heater is in good condition. Doing this will save you from potential threats and your budget from collapsing under costly repair costs.

Here are some other reasons why VEVOR diesel heater troubleshooting is a must-do:

  • Extending Lifespan: Inspecting and spotting problems before they become intense can prevent costly wear and tear. Timely addressing them will save you money and extend your heater’s lifespan by years.
  • Increased Efficiency: Improved and efficient functioning of your diesel is crucial for a various number of reasons. Regular troubleshooting and maintenance reduce inefficient combustion and wear and tear of a diesel heater’s components.
  • Eco-friendliness: A well-maintained diesel heater will reduce inefficient combustion and produce fewer emissions, thus helping the ecosystem. By timely troubleshooting your heater’s problems, you can play your role in minimizing air pollution.
  • Reliability: Who wants their heater to shut down and crash when they need it the most? Properly troubleshooting a diesel heater gives you that peace of mind and reassures you that it won’t fail you, especially in harsh conditions.

Common Diesel Heater Troubleshooting of VEVOR Diesel Heater

troubleshoot your diesel heater

Almost every piece of equipment comes with a set of technical complications that do not necessarily indicate a severe issue.

If you are switching your diesel heater on for the first time, it will highly likely fail you, which is quite normal. It happens because the fuel lines are air-filled, and the pump cannot push the fuel from the tank to the combustion chamber. Press and hold the button multiple times until it fires up.

Here’s a list of other common diesel heater problems you can troubleshoot all by yourself:

  • No Heat Output
  • Strange Noises
  • Smoke or Odors
  • Startup Failures
  • Inconsistent Heat

Troubleshooting a Diesel Heater Step-by-Step

By following the following steps, you will be able to troubleshoot your diesel heater concerns or at least diagnose them. Read the following section carefully for cost-saving diesel heater hacks to remember for this season:

Step 1: Getting Started!

The first step to diagnosing and VEVOR diesel heater troubleshooting is familiarizing yourself with its components and the process of how a diesel heater works.

Diesel heaters can seem like complex devices with so many small and big components, which most of us cannot even name properly. It is only necessary to know the workings of your system so that you don’t feel confused in case a problem arises.

Relevant Section:

  • If your diesel heater turns on but generates no heat, jump to step 2 to see what is wrong.
  • If those strange noises from your diesel heater are concerning you, jump to step 3 to explore more.
  • Sometimes, diesel heaters can generate a pungent smell or even release smoke; jump to step 4 to explore more and troubleshoot this issue.
  • See step 5 to check out why your diesel heater won’t turn on.
  • Step 6 entails a list of troubleshooting solutions for a heater that generates inconsistent heat.
  • If you are having trouble turning off your diesel heater, jump to step 7 to see what is wrong.

Step 2: When Diesel Heater Doesn’t Generate Heat

Causes: Insufficient or poor heating is one of the most commonly searched problems about diesel heaters online, which can be due to various reasons like:

  • A dirty or obstructed burner, fuel nozzle, and air inlet or outlet can be one explanation for why your diesel heater is not generating enough heat.
  • A malfunctioning or unreliable thermostat leads to improper heat output. But before declaring the thermostat faulty, check its wiring and electrical connections.
  • If the components are clean and fully functional, and the wiring is satisfactory, then an inadequate fuel supply is causing a VEVOR diesel heater to generate low heat.

Solutions: For inadequate heat generation VEVOR diesel heater troubleshooting:

  • Inspect and clean the burner and fuel nozzle for any clogs or debris. Then, access the diesel heater exhaust and examine air inlets and outlets for possible obstructions.
  • Analyze thermostat connections and fix the loose wirings if found. Additionally, check the thermostat for signs of wear and tear.
  • Lastly, verify if the fuel in the fuel tank is sufficient to energize your diesel heater. You can also inspect the fuel lines for cracks, damage, or leakage just to be extra sure.

Step 3: When Diesel Heater Makes Strange Noises

Causes: Weird noises are a common concern among diesel heater owners. Most of the sounds are generated during the heating process by the following components:

  • Combustion air passage when the combustible gases burn
  • The steel of the combustion tube deforms over time due to high temperatures, making a diesel heater noisy.
  • The sound of gas combustion emitting out of the heater with exhaust gases during the exhaust process
  • When the heater motor does not run at a constant speed, the diesel heater produces uneven sounds, which is normal.

Solutions: There are multiple practical solutions for noise cancellation of a VEVOR diesel heater:

  • An exhaust muffler between two exhaust pipes can also help with noise cancellation. Most people install it at the end of an exhaust pipe, which doesn’t help much with noise reduction.
  • A combustion air filter is always a great way to combat uneven combustion noise. These filters contain a sponge that absorbs noise and ensures uniform air flow, thus significantly canceling the sound.
  • Add a rubber gasket between the mounting plate and the diesel heater that can act as a shock and sound absorber.

Step 4: The Heater is Generating Smoke or Unpleasant Odors

Smoke Troubleshooting:

  • If your heater has switched on after multiple attempts, it is highly likely to generate smoke because it will be burning off unburnt fuel or excess soot.
  • When the heater runs on low for a very long time, soot starts building up in the pipes, causing blockages. To reduce smoke production in this scenario, run the heater on high to burn the soot, mount the exhaust pipe downwards to drain the condensation, and clean the exhaust pipe and muffler.
  • VEVOR diesel heater may blow white smoke in case of inadequate fuel supply for ignition.

Odor Troubleshooting:

You are obviously going to smell some diesel fuels while using a diesel heating system. However, an unusually strong odor can be a sign of a fuel leak or weak exhaust connections. Inspect the tank and fuel lines for cracks or damage to ensure there is no leakage. Then, examine the ventilation system and tighten the exhaust pipes if needed to reduce the unpleasant smell from your van.

Step 5: Heater Won’t Turn on or Fire Up

Reasons: There are several reasons why your diesel heater won’t turn on or not fire up even if it turns on, for instance, insufficient fuel, inadequate power supply, or no combustion airflow.


  • If your heater has been running reliably and has suddenly stopped, I’d suggest checking the fuel tank first.
  • However, if you live in a cold region and your heater takes multiple tries before starting, ensure the power supply is uninterrupted, sufficient, and smooth.
  • If your diesel heater has been lying dormant for some time, examine ducting, combustion chamber, and fuel levels.
  • Contact a VEVOR professional for service and let them know your device’s specifications if the issues still persist.

Step 6: When Heater Doesn’t Generate Consistent Heat

Reasons: A diesel heater produces inconsistent heat due to various reasons, including unsealed ducting, loose connections, voltage issues, and a clogged burner.


  • Examining your power or fuel supply sources can solve your issue in an instant if the reason is inadequacy in supply.
  • If the supply is adequate, check for a clogged burner and have it cleaned up.
  • Inspect your VEVOR diesel heater, especially the temperature sensor and thermostat, for loose connections and adjust them as required. If the issue still persists, you might need to examine these components for wear and tear and replace them in case of damage.
  • Diesel heater exhaust insulation plays a significant role in keeping the cold air from merging with the hot air. Thus, in case of inconsistent heat, you might want to inspect your ductwork and fix it if required.

Step 7: When Diesel Heater Won’t Turn Off

Reasons: Several users report that their diesel heater would turn on and sometimes even start blowing cold air. The reason behind the problem can be a faulty temperature sensor or its loose connections. Moreover, it can also be due to debris accumulation in any of the components of the diesel heating system, especially the glow plug.


  • Inspect the connections to the temperature sensor and replace them if faulty.
  • Cut the power supply, pull out the fuse, and thoroughly clean the pipes and the glow plug.
  • If the issue remains unsolved, you can call a professional to replace the glow plug or thermostat.

When to Seek VEVOR Professional Help

Since they are simple to access and relatively inexpensive to purchase, diesel heaters in heavy vehicles have grown in popularity.

Although the VEVOR diesel heater manual can assist with troubleshooting minor issues, these heaters occasionally need expert repair due to their complexity. It is always good to have an expert perform yearly or biannual maintenance to maintain your diesel heater functioning at its best and extend its longevity.

Your engine may occasionally encounter problems for which you may require professional advice. These issues include but are not limited to troubles with the fuel system, ignition, smoke, strange odors, error messages, and carbon monoxide concerns.

If left unaddressed, your diesel heater may suffer serious damage. If the issue persists after trying the simple remedies described in the troubleshooting guide, contact a specialist to have a look to ensure the durability and longevity of your diesel heater.

Summing Up

Our troubleshooting guide will help you diagnose and resolve minor diesel heater issues without having to waste your time and money. In fact, you will know the exact nature of the problem even if you have to call a professional.

VEVOR diesel heater is going to be a crucial component of your van or caravan during the coming season when the frost encapsulates the earth.

You can get your hands on some fine-quality diesel heaters of multiple sizes on our website for the most affordable prices. Now, you won’t have to worry about the temperature falling below the freezing points because you’ll have your reliable heating gear with you.

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