Cold weather can be challenging for RV owners. A working furnace is essential.
Imagine waking up to freezing temperatures inside your RV. The furnace is silent, and you can’t feel any warm air. This situation can turn a pleasant trip into a discomforting experience. Understanding why your RV furnace fails in cold weather is crucial.
It can be due to many reasons, from simple fixes to more complex issues. In this blog post, we’ll explore common problems and solutions. By understanding these, you can stay warm and enjoy your travels without worry. Let’s dive into how you can keep your RV furnace running smoothly, even when the temperature drops.
Common Issues
When your RV furnace stops working in cold weather, it can be frustrating. Understanding the common issues can help you solve the problem. Below, we discuss some of the most frequent problems.
Thermostat Problems
A faulty thermostat can cause your furnace to malfunction. Ensure that the thermostat is set to the correct temperature. Sometimes, the thermostat may need calibration. You can do this yourself or hire a professional.
Another common issue is dead batteries. Replace the thermostat batteries regularly to avoid problems. Also, check for loose wires. Loose or disconnected wires can cause the thermostat to fail.
Gas Supply Issues
Your furnace needs a steady gas supply to work properly. A common issue is an empty propane tank. Check the gas levels in your tank. If it’s low, refill it.
Another issue could be a blocked gas line. Dirt or debris can block the line, preventing gas flow. Inspect and clean the gas line if necessary. Also, ensure that the gas valve is open. A closed valve will stop the gas supply.
Sometimes, the problem lies in the regulator. A faulty regulator can cause gas flow issues. If you suspect this, replace the regulator.

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Basic Troubleshooting
If your RV furnace stops working in cold weather, don’t worry. Basic troubleshooting can often solve the issue. Below are some simple steps to get your furnace running again.
Check Power Supply
First, check the power supply to the furnace. Ensure that your RV’s batteries are charged and the electrical connections are secure. A weak battery can cause the furnace to malfunction.
- Verify the battery voltage with a multimeter.
- Inspect all wires and connections for damage.
- Ensure the circuit breaker is not tripped.
If the power supply seems fine, move on to the next step.
Inspect The Thermostat
The thermostat controls the furnace. Make sure it is set to heat and the desired temperature.
- Check if the thermostat display is working.
- Replace the batteries if needed.
- Ensure the mode is set to “heat” instead of “cool.”
- Adjust the temperature to a higher setting to test.
If the thermostat is not functioning, it might need replacement.
By following these basic troubleshooting steps, you can often resolve common issues with your RV furnace. If problems persist, it may be time to call a professional.
Pilot Light Problems
A common issue with RV furnaces in cold weather is pilot light problems. The pilot light is essential for igniting the furnace burner. If it malfunctions, the furnace won’t produce heat. This can be especially troublesome during chilly nights.
Pilot Light Won’t Stay Lit
If the pilot light won’t stay lit, there are a few potential causes. Dirt or debris in the pilot tube can block the gas flow. This prevents the light from staying lit. Another reason could be a faulty thermocouple. This device ensures the pilot light stays on. If it’s broken, the light will go out.
Sometimes, the problem lies with the gas supply. Low gas pressure or an empty tank can affect the pilot light. Check your gas levels if you encounter this issue. Ensure the gas valve is fully open as well.
How To Relight The Pilot
First, locate the pilot light assembly. This is usually near the bottom of the furnace. Turn off the furnace and wait a few minutes. This allows any gas to clear out.
Next, turn the gas valve to the ‘pilot’ position. Hold a lit match or lighter next to the pilot opening. While doing this, press and hold the reset button on the pilot control panel. Keep holding the button for a minute after the pilot lights. This helps the thermocouple heat up.
Release the reset button slowly. If the pilot light stays on, turn the gas valve to the ‘on’ position. Your furnace should now be ready to use. If the light goes out again, there may be a deeper issue needing professional help.

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Clogged Burner
Your RV furnace is essential during cold weather. A common issue is a clogged burner. This can affect the furnace’s performance. It’s important to recognize the signs and know how to clean it.
Signs Of A Clogged Burner
First, you might notice reduced heat output. The furnace may run, but it won’t warm the RV. Another sign is a strange smell. This can be from soot or debris. Loud noises can also indicate a problem. The burner might struggle to ignite. You may also see black smoke. This is a clear sign of incomplete combustion.
Cleaning The Burner
First, turn off the furnace. Let it cool completely. Safety is important. Next, remove the furnace cover. Locate the burner assembly. It’s usually near the bottom. Use a soft brush to clean the burner. Remove any debris or soot. You can also use compressed air. Blow out any remaining particles. Reassemble the furnace. Turn it on and test it. Make sure it runs smoothly. If problems persist, consult a professional. Regular maintenance can prevent future issues.
Airflow Blockages
If your RV furnace is not working in cold weather, airflow blockages may be the culprit. These blockages can prevent warm air from circulating properly, making your RV cold and uncomfortable. Below are some steps to help you identify and resolve these issues.
Inspect Vents
First, inspect all the vents in your RV. Make sure they are open and not blocked. Closed or blocked vents can restrict airflow, causing the furnace to overheat and shut down.
To inspect the vents, follow these steps:
- Locate all the vents in your RV.
- Ensure each vent is fully open.
- Check for any visible obstructions inside the vents.
Use a flashlight to look inside the vents. Dust or debris can build up and block airflow. Clean them if necessary.
Clear Obstructions
Next, clear any obstructions that might be blocking the airflow. This could be anything from furniture to personal items.
Here’s how to clear obstructions effectively:
- Move furniture away from vents.
- Remove any items stored near vents.
- Make sure curtains or drapes do not cover the vents.
Keeping the area around the vents clear ensures the warm air can circulate freely throughout the RV.
By addressing these airflow blockages, you can help your furnace work more efficiently and keep your RV warm during cold weather.
Faulty Igniter
Experiencing issues with your RV furnace in cold weather can be frustrating. One common problem is a faulty igniter. The igniter is crucial for starting the furnace. If it fails, the furnace won’t produce heat.
Symptoms Of A Faulty Igniter
- No Heat: The RV furnace does not produce any heat.
- Clicking Sound: You may hear a clicking sound, but no ignition.
- Intermittent Operation: The furnace starts and stops irregularly.
- Igniter Not Glowing: The igniter does not glow or spark.
Recognizing these symptoms helps you diagnose the issue quickly. Addressing the problem early prevents further damage.
Replacing The Igniter
Replacing a faulty igniter is a straightforward process. Here’s a simple guide:
- Turn Off Power: Ensure the power to the furnace is off. Safety first.
- Access the Igniter: Locate the furnace access panel. Remove it carefully.
- Remove the Old Igniter: Disconnect wires and remove screws holding the igniter.
- Install New Igniter: Place the new igniter in position. Secure it with screws.
- Reconnect Wires: Connect the wires to the new igniter.
- Test the Furnace: Turn the power back on. Test the furnace to ensure it works.
Replacing the igniter can restore your furnace’s functionality. Always refer to your RV’s manual for specific instructions.
Here’s a quick reference table for igniter replacement steps:
Step | Description |
---|---|
1 | Turn Off Power |
2 | Access the Igniter |
3 | Remove the Old Igniter |
4 | Install New Igniter |
5 | Reconnect Wires |
6 | Test the Furnace |
With these steps, you can address a faulty igniter with confidence. Keep warm and enjoy your RV travels.
Regular Maintenance
Your RV furnace is essential in cold weather. Regular maintenance ensures it works efficiently. Without care, it may fail when you need it most. Let’s explore the importance of regular maintenance.
Seasonal Checks
Performing seasonal checks is crucial. Before winter, inspect your RV furnace. Look for dirt or debris in the vents. Clean any blockages to ensure proper airflow.
Check the furnace’s ignition system. Ensure it lights up quickly and burns steadily. Replace any worn-out parts promptly. Regularly inspect the thermostat. Make sure it reads the correct temperature. Adjust if needed.
Professional Inspections
Hire a professional at least once a year. They can spot issues you might miss. A professional will check the furnace’s internal components. They will look at the blower motor, ignition system, and heat exchanger.
They can also test for gas leaks. Safety is paramount. Professionals use specialized tools. These tools detect problems early. This can save you from costly repairs later.
Emergency Tips
Dealing with an RV furnace that stops working in cold weather can be stressful. You need to stay warm and safe. Here are some emergency tips to help you through this situation.
Portable Heaters
Invest in a reliable portable heater. Many options are available, such as electric or propane heaters. Choose one suitable for indoor use. Ensure it has safety features like tip-over protection.
Place the heater in a central location. This helps distribute heat evenly. Keep flammable items away from the heater. Check the manufacturer’s instructions for safe operation.
Staying Warm Safely
Layering clothes is essential. Wear thermal underwear, sweaters, and socks. Use blankets and sleeping bags rated for cold weather.
Close off unused areas of your RV. This helps conserve heat. Open cabinet doors to let warm air reach plumbing. This prevents pipes from freezing.
Ventilation is important. Crack a window slightly to avoid carbon monoxide buildup. Use a carbon monoxide detector for extra safety.

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Frequently Asked Questions
Why Is My Rv Furnace Not Igniting?
Your RV furnace might not ignite due to issues with the thermostat, propane supply, or a faulty igniter. Check these components first.
How Do I Reset My Rv Furnace?
To reset your RV furnace, turn off the thermostat, wait a few minutes, then turn it back on.
What Causes An Rv Furnace To Blow Cold Air?
An RV furnace blowing cold air may indicate an empty propane tank or a malfunctioning blower fan.
How Often Should I Service My Rv Furnace?
Service your RV furnace annually to ensure it operates efficiently, especially before winter camping trips.
Conclusion
A working RV furnace is crucial in cold weather. Regular maintenance prevents breakdowns. Check propane levels and clean vents. Inspect the thermostat and fuses often. DIY fixes can help, but consult a professional if needed. Stay warm and safe on your RV adventures.
Proper care ensures your furnace works efficiently. Enjoy your travels without the cold becoming an issue.