RV Tech Ideas

7 Common RV Furnace Troubleshooting Guide and How to Fix Them Fast or Easy Way

RVs, also known as recreational vehicles, are popular for camping and vacationing worldwide. Specially In winter evenings, a working RV furnace is crucial for comfort. Proper RV furnace troubleshooting guides or camper furnace troubleshooting maintenance tips provide you with maximum performance during your winter RV journey.

My friend Mark shared his worst experience in his RV. He woke up from a chill as the night froze his RV. His main heating source, the RV furnace not working or has failed to work. The cold seemed to steal his breath, causing panic. Mark struggled to adjust the thermostat setting, but the RV remained cold. Desperation awaited. In his heaviest jacket, he thought of a solution. He examined the propane supply and found it empty, recalling basic troubleshooting. He replaced the gas tank to escape the freezing cold, bringing respite. That cold night, Mark learned a lesson and the importance of a working furnace, and after, he started researching, preparing, and educating others to face this type of issue once in a lifetime.

According to the RV Share 2022 survey, 23% of campers experienced heating and cooling issues when travelling.

Bonus Tip: Check the obvious before fixing or resetting your furnace. Is the thermostat on “heat” or not, and is the blower fan working? Are propane tanks full? A small inspection step and prevention can save you a lot of trouble (and any mishaps).

Are you facing similar furnace issues? Don’t worry! Here we will discuss step-by-step common possible RV furnace problems and preventative measures such as thermostats, power sources, ignition, gas valves, air flow, burners, blower motors, etc.

Let’s get started!

Overview of troubleshooting RV furnace problems  and Its Importance

RV furnaces use propane gas to provide warmth to the RV through ducting. A high-efficiency furnace has an AFUE rating of 90% or greater. To avoid deadly carbon monoxide emissions, furnace maintenance is necessary. Neglecting furnace maintenance might cause it to break down while camping, making it difficult to get help.

Checking the Thermostat

Checking the Thermostat

A working thermostat controls RV heater temperatures. The thermostat detects the surrounding temperature and turns the furnace on or off as you need. To maximize furnace performance, check the thermostat regularly.

Testing for proper thermostat operation

Start the furnace and set the temperature to test the thermostat. Check if your furnace is “on” and heating after a few minutes. If not, change the temperature to see if it helps. Replace the thermostat if it fails to respond.

Replacing a faulty thermostat

If you’re unsure of your skills, a professional should replace a broken thermostat. Turn off the furnace and disconnect the power. Remove the thermostat lid and disconnect the wires. After installing the replacement thermostat per the manufacturer’s directions, reconnect the cabling and reinstall the cover. At last, check the new thermostat’s operation.

In conclusion, monitoring the thermostat is crucial to RV furnace maintenance. Test and replace a defective thermostat for a safe and enjoyable camping trip.

Power Source

Power Source

Like any electrical device, the RV furnace needs power. A 12-volt battery or 110-volt electric connection powers the furnace. A broken power supply might cause your RV furnace to fail, causing discomfort and even danger.

Checking the power source

Check the power supply before addressing other furnace issues. Check for loose wires and corrosion, then test your RV batteries or electric hookup using a multimeter or voltage tester. Fix any problems before troubleshooting the furnace.

Replacing a blown fuse or tripped circuit breaker

If your furnace doesn’t operate, check for fuses or circuit breakers. The furnace’s fuse or breaker is usually in the owner’s manual. Replace or reset a blown fuse or tripped breaker, and test the furnace again.

Checking the power supply and replacing broken parts can prevent many RV furnace troubles. Follow the manufacturer’s instructions, switch off the power before performing repairs, and get expert aid if you’re unsure.

Ignition System

Ignition System

The RV furnace’s igniting system is essential for winter warmth. Incorrect ignition can cause heating issues, including a lack of heat or irregular heating. Understanding the ignition system and how to clean and maintain it is essential for furnace operation.

Understanding the ignition system

The pilot light, gas valve, and thermo-couple ignite the furnace. Because the pilot light ignites the gas, the thermocouple only opens the gas valve when it does. The furnace won’t heat without the pilot light. The thermocouple must work properly.

Cleaning and maintaining the ignition system

The ignition system can get clogged with dirt and debris, reducing efficiency and performance. Turn off the power, remove the furnace cover, and brush the ignition system components with a soft-bristled toothbrush during maintenance. Test and clean the flame sensor using steel wool.

Clean and maintain the ignition system to avoid heating issues, energy waste, and costly repairs. Following manufacturer instructions, reading the owner’s instruction manual, and getting expert advice.

Gas Valve

Gas Valve

Gas valves control RV furnace gas flow. Faulty propane gas valves might cause RV furnace heating troubles.

Testing the gas valve

A multimeter can measure gas valve voltage to identify a problem. Zero may indicate that the valve is not getting power, whereas 24 volts indicates that it is receiving power and working properly.

Replacing a faulty gas valve

If the gas valve fails, replace it. First, cut off the propane supply, loosen and remove the old valve, attach the new valve to the fittings, and test it.

Proper ignition system and gas valve maintenance keep the RV furnace running efficiently and reduce energy usage, reducing costly repairs. Maintaining RV furnace components is essential, whether following manufacturer instructions or getting expert help.



The RV furnace’s airflow is crucial to heating. Blockages can lower furnace efficiency, increase energy consumption, and increase maintenance expenses. Proper furnace maintenance and cleaning can prevent these types of concerns.

Checking the furnace airflow

Check the furnace’s airflow by clearing the vents and ducts. Airflow may be low due to blocked filters or ducting dirt. Also inspect the blower motor for proper functioning.

Cleaning and replacing air filters

Air filters keep particles and dust out of the furnace, preventing damage or efficiency. Clean or replace air filters every six months or per the manufacturer’s directions. Use a soft-bristled brush to clean or change filters.

Clean and maintain the RV furnace’s airflow components to extend its longevity. Maintaining furnace components requires following manufacturer instructions or hiring an expert to avoid costly problems.



The burner is essential to the RV furnace because it ignites and heats the air. The burner needs frequent maintenance and cleaning to work properly, avoid damage, and last longer.

Cleaning and maintaining the burner

Turn off the furnace and unhook the power source to clean the burner. Remove the furnace cover to reach the burner. A soft-bristled brush or air compressor can clean the burner and its parts. Check for damage and replace worn components quickly.

Replacing a faulty burner

The burner may need replacement if damaged beyond repair. Choose a burner that fits the furnace model and get expert help to install it safely.

Cleaning and maintaining the burner helps prevent costly repairs, minimize energy use, and keep the RV furnace working. For appropriate maintenance and safety, follow the manufacturer’s instructions or hire an expert.

Blower Motor

Blower Motor

The RV furnace’s blower motor circulates hot air through the heating system. The blower motor may wear out over time, but popular maintenance and cleaning can extend its lifespan.

Testing and replacing the blower motor

If the blower motor makes strange noises or fails to circulate hot air, it may need testing or replacement. When you test the blower motor, disconnect the furnace from electricity and remove the cover. A multi-meter is a device that can measure blower motor terminal voltage. Without electricity, the motor may need replacing.

To replace a broken blower motor, choose a furnace-compatible motor and get expert service for installation. Ignoring installation and replacement procedures might be dangerous.

Maintaining the blower fan

Cleaning the blower fan regularly prevents dirt and dust accumulation and improves airflow. Disconnect the furnace’s electricity and remove the access panel to maintain the blower fan. After seeing the fan blades, clean them with a soft brush or vacuum.

Finally, maintaining and cleaning the blower motor and fan may save energy usage, prevent costly repairs, and extend the RV furnace’s lifespan. For safe maintenance, follow the manufacturer’s instructions or contact an expert.

Warp up: RV Furnace Troubleshooting Guide

Finally, troubleshooting and fixing common RV furnace issues isn’t complicated. This guide shows you how to fix issues including lack of heat, weird sounds, how to clean and maintain your RV furnace blower motors and fans for lifespan, energy efficiency, and cost-effective production, and faulty ignition quickly. You’ll be back to RVing in comfort in no time! Do not allow furnace issues to ruin your adventures—restart the warmth today!

Final Thoughts And Recommendations

RV furnaces need regular maintenance to work well and last. Prioritize safety and get an expert for unfamiliar fixes. With the correct expertise and tools. Stay away, or be aware, and get expert help while troubleshooting the furnace to prevent safety issues.

Share Your Experience and Opinion and Help Others

Please share your experience and opinion related to Camper furnace troubleshooting guide tips in the comments below to help others maintain their RV furnaces efficiently.

FAQs: RV or Camper Furnace Troubleshooting Guide

Q: What are the common issues with RV furnaces?

Ans: Poor blower motors, clogged filters, and damaged or leaky ductwork are frequent RV furnace difficulties.

Q: How often should I clean my RV furnace blower motor?

Ans: For optimal efficiency, clean the RV furnace blower motor every six months.

Q: Can I replace my RV furnace blower motor myself?

Ans: RV furnace blower motor replacement needs professional installation.

Q: Why is my RV furnace making unusual noises?  

Ans: A filthy blower fan, broken blower motor, fractured ductwork, or clogged air filters can cause RV furnace sounds.

Hello, my name is Shaikh Obaid, a Civil Engineer by profession, and I love to travel. I also believe that living in an RV should be peaceful. A few years ago, I started rvtechideas.com, my dream travel website, I also share my professional and travel experiences on RV Tech Ideas.