RV Furnace Replacement – Your Complete Guide To Staying Warm

ByEric James Updated on

There’s nothing quite like the chill of a broken RV furnace to turn a cozy adventure into a shiver-inducing ordeal. Whether you’re chasing winter sun, exploring shoulder seasons, or simply need reliable heat for comfort, a malfunctioning furnace can quickly put a damper on your travels.

We’ve all been there: that dreaded moment when the fan kicks on, but no warm air follows. It’s not just an inconvenience; it can be a safety concern, especially if you’re traveling with family or in colder climates. Understanding the ins and outs of rv furnace replacement is a vital skill for any RVer, from weekend warriors to full-time road warriors.

This comprehensive guide will equip you with the knowledge to tackle common furnace issues, determine if a full RV furnace replacement is necessary, and navigate the process with confidence. We’ll cover everything from diagnosing problems and choosing the right unit to step-by-step installation best practices and crucial post-replacement care. By the end, you’ll feel empowered to ensure your mobile home stays warm and welcoming, no matter where the road takes you.

Let’s dive in and make sure your next outdoor adventure is comfortably heated!

Why Your RV Furnace Matters and When to Consider Replacement

Your RV furnace is more than just a luxury; it’s an essential component for comfort and safety, especially when temperatures drop. It protects your RV’s plumbing from freezing, keeps you and your fellow travelers warm, and helps prevent condensation buildup.

Recognizing the signs that your furnace is failing is the first step toward a smooth rv furnace replacement process. Don’t wait until you’re shivering in a snowstorm to address the issue.

Common Signs It’s Time for a New Furnace

  • Inconsistent Heating: Your furnace struggles to maintain a set temperature, or only blows lukewarm air.
  • Loud or Unusual Noises: Grinding, squealing, or rattling sounds can indicate failing motors or bearings.
  • Frequent Cycling: The furnace turns on and off too often, failing to complete a full heating cycle.
  • Pilot Light Issues: If your pilot light frequently goes out or won’t stay lit, it could be a sign of a deeper problem.
  • Carbon Monoxide Detector Alarms: This is a critical safety warning. If your CO detector goes off, turn off the furnace immediately and ventilate your RV. It could indicate a cracked heat exchanger, necessitating immediate replacement.
  • Age of Unit: Most RV furnaces have a lifespan of 15-20 years. If yours is older, preventative replacement might be wise.
  • Rising Repair Costs: If repairs are becoming frequent and expensive, a new unit often makes more financial sense.

Paying attention to these indicators can save you significant discomfort and expense down the line. Sometimes, a full replacement is the most efficient and safest solution.

Diagnosing Your RV Furnace Problems: Is Replacement Necessary?

Before you jump into a full rv furnace replacement, it’s smart to perform some basic troubleshooting. Many common issues can be resolved without replacing the entire unit.

However, some problems clearly point towards the need for a new furnace. Knowing the difference can save you time and money.

Initial Troubleshooting Steps

Start with the simplest checks first:

  • Check Propane Levels: Ensure your propane tanks are full and the valves are open. A common oversight!
  • Verify 12V Power: Your furnace requires 12-volt DC power to operate the fan, circuit board, and igniter. Check your RV’s battery voltage and fuses.
  • Inspect Thermostat: Make sure the thermostat is set correctly and the batteries (if applicable) are fresh.
  • Clean Vents and Returns: Blocked airflow can cause the furnace to overheat and shut down. Clear any obstructions.
  • Examine Exhaust Vent: Ensure the exterior exhaust vent is clear of debris, insect nests, or anything that could impede airflow.
  • Reset the Furnace: Sometimes, turning the furnace off at the thermostat, then turning off the main 12V power switch for a few minutes, can reset the system.

When to Call a Professional

While basic troubleshooting is within reach for most RVers, certain issues demand expert attention. If you suspect a gas leak, a cracked heat exchanger, or have persistent electrical problems that you can’t identify, it’s time to seek professional help.

Gas appliances are inherently dangerous if mishandled. Don’t risk your safety or the integrity of your RV by attempting repairs beyond your comfort and skill level. A certified RV technician can diagnose complex issues and provide sound advice on whether repair or replacement is the best course of action.

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DIY RV Furnace Replacement vs. Professional Help

The decision to tackle an rv furnace replacement yourself or hire a professional depends on several factors: your mechanical aptitude, available tools, comfort with propane and electrical systems, and the complexity of your RV’s setup.

For some, the satisfaction of a DIY project is appealing. For others, the peace of mind that comes with professional installation is invaluable.

Pros and Cons of DIY Replacement

Pros:

  • Cost Savings: You save on labor costs, which can be significant.
  • Learning Experience: You gain a deeper understanding of your RV’s systems.
  • Flexibility: You can work on your own schedule.

Cons:

  • Safety Risks: Working with propane and electrical systems carries inherent dangers if not done correctly.
  • Complexity: RV furnaces can be intricate; improper installation can lead to malfunctions or safety hazards.
  • Tools Required: You might need specialized tools, adding to the initial cost.
  • Warranty Issues: Some manufacturers may void warranties if installation isn’t performed by a certified technician.

When to Opt for Professional Installation

If you’re unsure about any step, lack the proper tools, or are dealing with a particularly complex RV model, hiring a professional is the safest bet. They have the expertise, specialized equipment, and certifications to ensure the job is done correctly and safely.

This is especially true for those concerned about gas line connections, electrical wiring, or ensuring optimal performance and efficiency for sustainable rv furnace replacement.

Choosing the Right RV Furnace for Your Rig

Selecting the correct furnace is crucial for efficient heating and a successful rv furnace replacement. It’s not a one-size-fits-all situation.

Consider your RV’s size, your typical travel destinations, and your power preferences when making this important choice.

Types of RV Furnaces

The most common types you’ll encounter are:

  • Propane Furnaces: These are standard in most RVs, known for their powerful heating capabilities. They run on propane and require 12V DC power for the fan and control board.
  • Electric Heat Pumps/AC Units with Heat Strips: Primarily for cooling, many RV air conditioners also offer an electric heat strip function. These are great for mild weather but less efficient in very cold temperatures compared to propane furnaces.
  • Diesel Heaters: Popular in some larger RVs and overlanding rigs, these use diesel fuel and are very efficient, especially in extreme cold.

Sizing Your New Furnace

Furnace size is measured in British Thermal Units (BTUs). A furnace that’s too small won’t adequately heat your RV, while one that’s too large can cycle on and off too frequently, reducing efficiency and lifespan.

To determine the correct BTU rating:

  1. Check Your Current Furnace: The BTU rating is usually listed on a label inside the furnace housing. This is your best starting point.
  2. Consider RV Size: Smaller RVs (under 20 feet) might need 16,000-20,000 BTUs. Medium RVs (20-30 feet) often use 25,000-35,000 BTUs. Larger RVs (over 30 feet) can require 40,000 BTUs or more.
  3. Insulation and Climate: If your RV is poorly insulated or you frequently travel in very cold climates, consider a slightly higher BTU rating.

Popular brands include Suburban and Dometic, offering a range of sizes and features. Ensure your new furnace’s dimensions match the existing opening in your RV, or be prepared for minor modifications.

Step-by-Step RV Furnace Replacement Guide

This section provides a general overview of how to rv furnace replacement. Always consult your specific furnace’s installation manual and your RV’s service manual for detailed instructions and safety precautions.

Remember, safety first! If you are uncomfortable at any point, stop and consult a professional.

1. Preparation and Safety First

  • Gather Tools: You’ll likely need screwdrivers, wrenches, pliers, a multimeter, sealant, thread sealant (for gas lines), and possibly a propane leak detector.
  • Turn Off All Power: Disconnect shore power, turn off your RV’s main 12V battery disconnect, and turn off all propane at the tank(s).
  • Ventilate: Open windows and doors to ensure good airflow.
  • Wear PPE: Gloves and eye protection are recommended.

2. Disconnecting the Old Furnace

  1. Access the Furnace: This usually involves removing an exterior vent cover and/or interior panels.
  2. Disconnect Propane Line: Carefully loosen the flare nut connecting the propane line to the furnace. Be prepared for a small amount of residual gas. Cap the line temporarily to prevent debris entry.
  3. Disconnect Electrical Wiring: Label all wires before disconnecting them (power, ground, thermostat wires). Take photos if it helps.
  4. Remove Ductwork and Vents: Detach any heating ducts connected to the furnace.
  5. Unscrew Mounting Brackets: Remove the screws or bolts holding the furnace in place.
  6. Carefully Remove Old Unit: Gently slide the old furnace out of its compartment. It might be heavy, so lift with care.
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3. Installing the New Furnace

  1. Prepare the Opening: Clean the furnace compartment thoroughly. Apply new sealant around the opening if needed to ensure a watertight seal.
  2. Position New Furnace: Carefully slide the new furnace into the opening. Ensure it sits flush and properly aligned.
  3. Secure Mounting Brackets: Fasten the new furnace securely with screws or bolts.
  4. Reconnect Ductwork: Attach the heating ducts to the new furnace. Ensure tight connections for optimal airflow.
  5. Reconnect Electrical Wiring: Match the labeled wires from step 3 to the corresponding terminals on the new furnace. Double-check all connections.
  6. Reconnect Propane Line: Apply thread sealant (specifically designed for gas lines) to the flare fitting, then carefully reattach the propane line. Tighten securely but do not overtighten.

4. Testing and Leak Detection

  1. Perform a Leak Test: Turn on your propane tanks. Apply a soapy water solution (or a commercial leak detector spray) to all propane connections you touched. Look for bubbles, which indicate a leak. If you see bubbles, turn off propane, tighten the connection, and retest. Repeat until no bubbles appear.
  2. Reconnect 12V Power: Turn on your RV’s main battery disconnect.
  3. Test the Furnace: Set your thermostat to a high temperature. Listen for the fan, igniter click, and feel for warm air. The initial start-up may take a few cycles to purge air from the gas line.
  4. Monitor Performance: Let the furnace run for a while to ensure it cycles properly and heats the RV effectively.
  5. Check CO Detector: Ensure your carbon monoxide detector is working and monitor it during initial operation.

This detailed rv furnace replacement guide provides the practical steps needed for a successful swap.

Sustainable & Eco-Friendly RV Furnace Replacement Practices

At OutwardLab, we believe in living outdoors smarter and more sustainably. When considering an rv furnace replacement, you have opportunities to make environmentally conscious choices.

Opting for eco-friendly rv furnace replacement options benefits both your wallet and the planet.

Disposing of Your Old Furnace Responsibly

Don’t just toss your old furnace in the trash. It contains metal components and potentially hazardous materials that should be recycled or disposed of properly.

  • Scrap Metal Yards: Many components, especially the casing and heat exchanger, are metal and can be recycled at local scrap metal facilities.
  • RV Dealerships/Service Centers: Some may offer disposal services, especially if you purchase a new unit from them.
  • Local Waste Management: Check with your local waste management facility for guidelines on appliance disposal or hazardous waste collection days.

Choosing Energy-Efficient Models

Modern RV furnaces are often more energy-efficient than older models. Look for units with higher AFUE (Annual Fuel Utilization Efficiency) ratings.

An energy-efficient furnace will:

  • Reduce Propane Consumption: Saving you money and reducing your carbon footprint.
  • Lessen Emissions: Burning less fuel means fewer emissions.
  • Provide Consistent Heat: Better efficiency often translates to more reliable and consistent heating.

Consider upgrading to a “smart” thermostat as well. These can optimize heating cycles, further reducing energy waste and contributing to sustainable rv furnace replacement.

Post-Replacement Care and Maintenance: RV Furnace Replacement Best Practices

Installing a new furnace is just the beginning. Proper post-replacement care and ongoing maintenance are key to ensuring its longevity and efficient operation. These rv furnace replacement best practices will keep you warm for years to come.

A little preventative maintenance goes a long way in preventing future breakdowns.

Regular Maintenance Schedule

Implement a routine maintenance schedule for your new furnace:

  • Annual Inspection: Have a certified RV technician inspect your furnace at least once a year, preferably before the cold season. They can check gas pressure, electrical connections, heat exchanger integrity, and overall performance.
  • Clean Air Intakes and Exhaust: Regularly check and clean the exterior intake and exhaust vents to prevent blockages from dirt, leaves, or insect nests.
  • Inspect Ductwork: Ensure all heating ducts are securely connected and free of kinks or damage.
  • Check Propane Connections: Periodically perform a soapy water leak test on all propane connections.
  • Clean Interior Components: With power and propane off, carefully vacuum around the furnace’s interior components to remove dust and debris. Do not touch sensitive electrical parts.
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Winterization and Storage Tips

Proper winterization is crucial if you store your RV in freezing temperatures and is a vital part of your rv furnace replacement care guide.

  • Drain Water System: Ensure your entire water system (tanks, lines, water heater) is drained and winterized with RV antifreeze to prevent freezing and bursting pipes. This protects your furnace by preventing a cold RV from damaging its surroundings.
  • Turn Off Propane: Close the valves on your propane tanks.
  • Disconnect 12V Power: Use your RV’s battery disconnect switch or physically disconnect the battery to prevent parasitic draws.
  • Ventilation: Ensure your RV is adequately ventilated during storage to prevent moisture buildup, which can affect electrical components.

Following these simple steps will extend the life of your new furnace and ensure it’s ready for your next adventure.

Frequently Asked Questions About RV Furnace Replacement

What is the average cost of RV furnace replacement?

The cost varies significantly based on the furnace model, BTU rating, and whether you DIY or hire a professional. Expect to pay anywhere from $500 to $1,500 for the furnace unit itself. Professional installation can add another $300 to $1,000+ in labor costs.

How long does an RV furnace replacement typically take?

For an experienced DIYer or a professional technician, a straightforward replacement can take 2-4 hours. If modifications to the opening or ductwork are needed, or if troubleshooting unexpected issues arises, it could take longer.

Can I upgrade my RV furnace to a higher BTU model?

Yes, often you can. However, you must ensure the new furnace physically fits the existing opening and that your RV’s ductwork and propane supply line can handle the increased capacity. Consult your RV manufacturer or a professional to confirm compatibility and safety.

What safety precautions should I take when replacing an RV furnace?

Always turn off all propane at the tank and disconnect all 12V power to the RV. Ensure proper ventilation. Have a fire extinguisher nearby. If you are uncomfortable working with propane or electrical systems, hire a certified professional.

How often should I have my RV furnace serviced?

It’s recommended to have your RV furnace professionally serviced and inspected at least once a year, ideally before the start of the cold weather season. This ensures optimal performance, efficiency, and safety.

Replacing your RV furnace might seem like a daunting task, but with the right information and a methodical approach, it’s a manageable project that significantly enhances your RV living experience. Remember, staying warm and safe on the road is paramount.

By understanding the signs of a failing unit, making informed choices about replacement, and committing to proper maintenance, you’re not just fixing a problem—you’re investing in countless comfortable journeys ahead. Embrace these rv furnace replacement tips to confidently tackle this essential upgrade.

Stay warm, stay safe, and happy trails from OutwardLab!

Eric James
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