
Thermo Pride furnaces are oil-burning furnaces, with some models designed for use in mobile homes. They can be converted to gas furnaces with a power converter. The amount of fuel used by a Thermo Pride furnace depends on various factors, such as the model, age, and specific usage patterns. Some users have reported issues with their furnaces not starting or functioning properly due to fuel-related problems, indicating that proper fuel usage is critical for the optimal operation of these furnaces.
| Characteristics | Values |
|---|---|
| Fuel Type | Kerosene, Diesel #1 Fuel, Diesel #2 Fuel, Oil |
| Furnace Type | Horizontal lowboy fuel oil furnace |
| Other Features | No pilot light |
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What You'll Learn

Thermo Pride furnace fuel types
When choosing a furnace, it is essential to consider factors such as fuel type, furnace size, energy efficiency, and cost-effectiveness. The type of fuel a furnace uses determines the category it falls into. Thermo Pride furnaces use different types of fuel, including gas, electric, and oil.
Gas furnaces are the most common type, utilizing natural gas as their primary energy source. They are known for their efficiency and cost-effectiveness compared to other fuel types. Propane furnaces, another variation of gas furnaces, use propane gas as their fuel source. They are highly efficient, environmentally friendly, and provide consistent heat, even in extremely cold temperatures. Propane furnaces are versatile and can be installed in areas without access to natural gas. Most natural gas furnaces can be converted to use propane through a Propane Conversion Kit accessory.
Electric furnaces, on the other hand, are ideal for regions with limited access to natural gas. They convert electrical energy into heat and do not require venting because they produce no combustion byproducts, making them 100% efficient.
Oil furnaces, such as the Thermo Pride Horizontal Lowboy, use fuel oil, kerosene, or diesel as their fuel source.
The Annual Fuel Utilization Efficiency (AFUE) rating is an important measure to consider when evaluating the efficiency of a furnace. It indicates how effectively a furnace converts fuel into heat over a typical heating season, with higher AFUE ratings denoting greater efficiency and lower operating costs. Additionally, Energy Star-certified furnaces meet strict energy efficiency guidelines set by the U.S. Environmental Protection Agency (EPA), ensuring energy savings without compromising performance.
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Troubleshooting a Thermo Pride furnace
If your Thermo Pride furnace is not working, it could be due to several reasons. Here are some troubleshooting steps you can try:
Check the fuel
The most common issue with a Thermo Pride furnace is that it stops working when it runs out of fuel. If this happens, you will need to refill the tank and bleed the pump. Locate the nipple-like fitting next to where the top oil line hooks into the unit. Use an open wrench to turn this fitting when the unit starts up, and have a cup ready to catch the oil. Once you get a good flow of oil, shut the nipple, and the unit should fire up.
Bleed the line
If your furnace won't ignite, it could be due to air in the line. Bleeding the line can help resolve this issue. Locate the bleeder valve and open it to release any air trapped in the line. You may need to repeat this process several times until all the air is out.
Check the feeder tube
If your furnace has power but won't start, the issue could be with the feeder tube. The feeder tube may be clogged or disconnected, especially if the fuel tank has been moved or tipped recently. Check the feeder tube and clear any blockages or reconnect it if necessary.
Use the correct fuel
Thermo Pride furnaces typically use kerosene or diesel #2 as fuel. Using the wrong type of fuel can cause issues with the furnace's performance and may void your warranty. Always refer to the manufacturer's instructions or consult a professional if you are unsure about the type of fuel to use.
Consult a professional
If you have tried the above troubleshooting steps and your furnace still isn't working, it's best to contact a qualified HVAC technician or a Thermo Pride service centre for further assistance. Do not attempt to repair or modify your furnace unless you have the necessary training and qualifications.
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Converting a Thermo Pride furnace to gas
Thermo Pride furnaces are known for their superior workmanship and product innovation, delivering handcrafted products that offer reliability, comfort, durability, quiet operation, and high efficiency.
- Consult a Professional: While the idea of converting a furnace may seem straightforward, it is important to consult a qualified HVAC technician or a professional from Thermo Pride. They can assess your specific furnace model, the condition of your unit, and provide guidance on the best conversion approach.
- Understand the Feasibility: Before beginning the conversion process, it is essential to determine if your Thermo Pride furnace can be converted to gas. Some older models may have limitations or require significant modifications, making it more feasible to install a new gas furnace.
- Power Converter Option: According to some sources, it may be possible to convert a Thermo Pride oil furnace to gas using a power converter. This option should be carefully evaluated with the help of a professional to ensure it is safe and compatible with your specific furnace model.
- Consider a New Gas Furnace: If your current Thermo Pride furnace is older or less efficient, it may be more cost-effective in the long run to install a new gas furnace. Thermo Pride offers high-efficiency gas furnaces, such as the CMA4 Series, which are designed as replacement furnaces for mobile homes.
- Evaluate Energy Efficiency: When converting to gas, it is important to consider the energy efficiency of the new system. Look for furnaces with a high Annual Fuel Utilization Efficiency (AFUE) rating, such as those rated at 92% AFUE or higher. This will ensure that your new gas furnace provides significant energy savings.
- Ductwork and Insulation: Pay attention to ductwork during the conversion process. Properly insulating ducts can prevent heat loss and improve the overall efficiency of your heating system. Consult qualified contractors who can advise on safe and effective insulation materials.
- Gas Line Connection: If you decide to convert to gas, you will need to establish a gas line connection to your home. In some cases, companies like National Grid may offer discounts for connecting the gas line when you switch to gas heat. Ensure you understand the costs and procedures involved in establishing this connection.
- Reliability and Maintenance: After converting to gas, ensure that your furnace is properly maintained for reliable operation. Regular servicing by qualified technicians can help extend the lifespan of your converted furnace and ensure it operates efficiently.
By carefully considering these steps and seeking professional guidance, you can successfully convert your Thermo Pride furnace to gas, enjoying the benefits of a more efficient and environmentally friendly heating system.
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Fuel efficiency of Thermo Pride furnaces
Thermo Pride has been a cornerstone in the heating industry for over seven decades, delivering high-performance heating solutions. The brand stands for handcrafted products with high efficiency, comfort, reliability, durability, and quiet operation. Thermo Pride units are designed and built to last longer, with an unwavering commitment to excellence.
Thermo Pride furnaces are known for their fuel efficiency, providing lasting warmth and reliability. While the exact fuel consumption of Thermo Pride furnaces may vary depending on the specific model and usage conditions, several sources indicate that they typically run on fuel oil, diesel, or kerosene. Some older models may use diesel #2, while newer models might require diesel #1 fuel.
One source mentions that their Thermo Pride furnace ran out of fuel, causing it to shut down. This highlights the importance of ensuring a steady fuel supply to maintain the furnace's operation. Additionally, proper maintenance and troubleshooting are crucial to optimizing fuel efficiency. For example, issues with the feeder tube or other components can affect fuel usage and the overall performance of the furnace.
To further enhance fuel efficiency, ductwork plays a significant role. Insulating ductwork in crawl spaces can improve efficiency and reduce heat loss. This is supported by a homeowner's testimony, who noticed a 17-degree temperature drop from their oil furnace to the register before insulating their ductwork. By addressing leaks and using appropriate sealing methods, such as mastic for metal ducts, homeowners can maximize the efficiency of their Thermo Pride furnaces.
Converting a Thermo Pride furnace from oil to gas is another option to consider. While some question the reliability of conversion, others suggest that it may not be worth changing solely based on fuel prices, as they tend to fluctuate. However, for those seeking a more environmentally friendly option or taking advantage of discounts offered by gas companies, conversion could be a viable choice. Thermo Pride offers a gas furnace option with a 92+ AFUE (Annual Fuel Utilization Efficiency) rating, indicating its focus on energy efficiency.
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Thermo Pride furnace maintenance
Thermo Pride furnaces are renowned for their high-performance heating solutions, delivering comfort and reliability to homeowners. To ensure optimal performance and longevity, regular furnace maintenance is crucial. Here are some detailed instructions and tips for maintaining your Thermo Pride furnace:
Understanding Your Thermo Pride Furnace
Before performing any maintenance, it's essential to understand the specifics of your Thermo Pride furnace. Thermo Pride offers a range of furnace models, including the OHC95, CLHS1 Series, OH6 Premiere Series, and more. Each model has unique features and specifications that may require slightly different maintenance approaches. Familiarize yourself with the model you own, including its fuel type, heat exchanger design, and any special requirements.
Regular Maintenance Tasks
Thermo Pride furnaces are designed to be easy to maintain. Here are some general maintenance tasks to keep your furnace operating efficiently:
- Annual Inspections and Tune-ups: Schedule annual inspections and tune-ups with a qualified HVAC technician. These professionals can clean, adjust, and optimize your furnace for safe and efficient operation. Annual tune-ups for the OHC95 model are expected to take approximately 20 to 30 minutes longer than standard non-condensing furnaces.
- Fuel and Oil Maintenance: Ensure that you use the correct type of fuel for your furnace, as specified by Thermo Pride. This could be kerosene, diesel #2, or a combination of both, depending on the model and weather conditions. Regularly check your fuel levels to avoid running out, which can cause issues.
- Heat Exchanger Care: Thermo Pride furnaces are designed with accessible heat exchanger cleanout locations, making maintenance easier. The Octatherm Heat Exchanger, for example, is coated in copper to prevent corrosion in damp conditions. Keep the heat exchanger clean and free of debris to maximize heat transfer efficiency.
- Burner and Firing Rates: Thermo Pride furnaces offer different burner options, such as Beckett, Carlin, or Riello. Ensure that the burner is properly adjusted and maintained for optimal firing rates. The Riello BF3 burner used in the OHC95 model is pre-set and test-fired before shipment for immediate operation.
- Ventilation and Exhaust: Proper ventilation is crucial for safe operation. Follow the venting guidelines provided by Thermo Pride, especially when using direct vent, sealed combustion systems like the OHC95. Ensure that the vent termination is located above the snow line, as specified by Thermo Pride's guidelines.
- Filter Maintenance: Regularly check and replace the air filters in your Thermo Pride furnace as recommended. This helps maintain efficient airflow and reduces the risk of dust and debris buildup, which can impact performance.
Troubleshooting Common Issues
Even with regular maintenance, you may encounter occasional issues with your Thermo Pride furnace. Here are some common problems and troubleshooting tips:
- No Heat: If your furnace is not producing heat, check the emergency shut-off valve and ensure it is in the "on" position. Also, inspect the fuel levels and ensure there is sufficient fuel for operation.
- Red Light on Control Panel: If the red light next to DS1 on the control panel is illuminated, it could indicate an issue with the furnace. Try opening the furnace door, pressing the door button, and simultaneously pushing the reset button on the oil burner.
- Old or Worn Components: If your furnace is over 12 years old, it may be approaching the end of its lifespan. Keep an eye out for warning signs such as reduced fuel efficiency, temperature imbalances, or strange noises. Consider upgrading to a newer model for improved performance and energy efficiency.
When to Seek Professional Help
While regular maintenance can be performed by homeowners, some tasks require professional assistance. Thermo Pride recommends that certain models, like the OHC95, be handled only by specially trained and certified contractors. For complex issues, unusual noises, or persistent problems, always consult a qualified HVAC technician or seek support through Thermo Pride's customer service channels.
Remember, regular maintenance of your Thermo Pride furnace will not only ensure its efficient operation but also extend its lifespan, providing lasting warmth and comfort for years to come.
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Frequently asked questions
The amount of fuel used by a Thermo Pride furnace depends on various factors, such as the age and model of the furnace, and individual usage patterns. However, some users have reported that their furnaces use diesel #2 fuel or kerosene.
The Thermo Pride furnace typically uses fuel oil or diesel fuel.
Yes, some Thermo Pride furnace owners have reported using kerosene as fuel without any issues.
Yes, some owners of older Thermo Pride furnaces have reported successfully using diesel #2 fuel. However, it is always recommended to refer to the manufacturer's guidelines for your specific model.
If your Thermo Pride furnace is low on fuel, you may experience issues such as a lack of heat or unusual noises. Additionally, the red light next to DS1 on the control panel may illuminate, indicating a potential fuel-related issue.










































