Can Am Defender Inferno Heater Install

Let’s agree on something: the cold has a way of cutting a great day of riding short. When that frigid air starts biting through your layers, even the best trail can feel miserable. You bought your Can-Am Defender to be a workhorse and a trail-tackling beast, not a seasonal garage ornament.

We promise this guide will change that. We’re going to walk you through a complete can am defender inferno heater install, step-by-step. This isn’t just about bolting on a part; it’s about reclaiming your ride, no matter what the thermometer says.

In this comprehensive guide, we’ll cover everything from the tools you’ll need and the pre-install prep to the detailed installation process, common pitfalls, and long-term care. Get ready to turn your Defender into a warm, comfortable, four-season machine.

Why an Inferno Heater is a Game-Changer for Your Defender

Before we bust out the tools, let’s talk about the why. Installing an aftermarket heater isn’t just a luxury; for many of us, it’s a necessity that transforms the usability of our rigs. The benefits of can am defender inferno heater install go far beyond simple warmth.

Extend Your Riding Season

This is the big one. A good heater means you’re no longer at the mercy of the weather. Fall hunts, winter property maintenance, or just a brisk trail ride become enjoyable experiences instead of endurance tests.

Safety and Visibility

A heated cab does more than keep you warm. The included defroster vents are critical for maintaining a clear windshield. In cold, damp conditions, fog and frost can build up in seconds, creating a serious safety hazard. A powerful defroster keeps your line of sight crystal clear.

Comfort for You and Your Passengers

Let’s be honest, a comfortable rider is a better rider. When you aren’t shivering and miserable, you’re more focused and can enjoy the ride. It also makes bringing along family and friends a much more pleasant proposition for them.

Increased Vehicle Value

A professionally installed, high-quality accessory like an Inferno heater can add to the resale value of your Defender. It’s a highly desirable feature for potential buyers in colder climates.

Gearing Up: Tools and Parts for Your Can Am Defender Inferno Heater Install

A successful job starts with having the right gear on hand. Rummaging for a tool mid-install is frustrating and wastes time. Here’s a checklist of what you’ll need for a smooth can am defender inferno heater install.

Essential Tools

Socket and Ratchet Set: A good metric set is essential for nearly every step.
Torx Bit Set: Can-Am loves Torx fasteners, so don’t even start without a full set.
Trim Removal Tool Kit: These plastic pry tools are a lifesaver for removing dash panels without scratching them.
Hose Clamp Pliers: These make dealing with spring-style hose clamps infinitely easier.
Hose Cutters: For a clean, square cut on your new heater hoses. A sharp utility knife can work in a pinch.
Spill-Proof Coolant Funnel: This is a must-have for refilling and “burping” the coolant system to remove air pockets.
Drain Pan: To catch the coolant you’ll be draining from the system.
Drill and Hole Saw Kit: You’ll need to drill holes for the heater hoses and defroster vents.
Safety Glasses and Gloves: Non-negotiable. Protect your eyes from debris and your hands from hot or spilled coolant.

Parts and Supplies

Inferno Heater Kit: Make sure you have the correct kit for your specific Can-Am Defender model and year.
OEM-Approved Coolant: Get an extra gallon of the same type of coolant that’s already in your Defender. Do not mix coolant types!
Zip Ties: For securing hoses and wiring neatly.
Rags or Shop Towels: For cleaning up spills and messes.

The Ultimate Can Am Defender Inferno Heater Install Guide: Step-by-Step

Alright, it’s go-time. This is the core of our how to can am defender inferno heater install walkthrough. Take your time, read each step carefully, and double-check your work as you go. Remember, this is about precision, not speed.

Disclaimer: These are general steps. Always refer to the specific instruction manual that came with your Inferno heater kit, as details may vary slightly by model year.

Step 1: Prep and Draining the Coolant

First, make sure your Defender is on a level surface and the engine is completely cool. Never open a hot cooling system.

Place your drain pan under the front of the vehicle.
Locate the radiator drain plug or the lowest coolant hose and carefully remove it to drain the system. Open the radiator cap to help it drain faster.
While it’s draining, disconnect the vehicle’s battery. This is a crucial safety step before doing any electrical work.

Step 2: Gaining Access – Dash Disassembly

This is where your trim removal tools come in handy. You’ll need to remove the center dash console and potentially other panels to mount the heater core and run the vents.

Use your Torx bits and trim tools to carefully remove the necessary dash panels. Keep all screws and clips organized in a magnetic tray or labeled bags.
Take a picture with your phone before you unplug any factory wiring harnesses so you remember where they go.

Step 3: Mounting the Heater Core

The heater core is the heart of the system. Your kit will have a specific mounting bracket and location, typically high up under the dash.

Securely fasten the mounting bracket to the vehicle’s frame as indicated in the instructions.
Mount the heater core unit to the bracket. Ensure it’s tight and doesn’t rattle. This is one of the most important can am defender inferno heater install best practices to avoid noise down the road.

Step 4: Running the Vents and Hoses

Now it’s time to bring the heat where you need it. This step involves some drilling, so measure twice and cut once.

Use the provided templates and a hole saw to carefully cut the openings for your floor and defroster vents in the dash panels.
Run the flexible ducting from the heater core outlets to the newly installed vents. Secure each end with the provided clamps or zip ties.
Next, drill the two holes in the firewall for the main heater hoses to pass through to the engine bay. Install the rubber grommets to protect the hoses from the sharp metal edge.

Step 5: Tapping into the Cooling System

This is where you connect your new heater to the Defender’s engine. You’ll be splicing the heater hoses into the factory coolant lines.

Locate the two coolant lines specified in your instructions (typically running along the passenger side frame).
Find a straight section, and using your hose cutters, cut one of the lines. Use the provided “Y” fittings to splice the new heater hoses into the system.
Pro-Tip: Pay close attention to the flow direction. One hose is the “inlet” from the hot engine, and the other is the “outlet” returning cooler fluid. Getting this right is critical.
Route the new hoses from the engine bay, through the firewall grommets, and connect them to the heater core. Secure all connections with hose clamps. Make sure the hoses are not kinked or resting on sharp edges or hot exhaust components.

Step 6: Wiring the System

With the plumbing done, it’s time for the electrical connections.

Mount the fan switch in a convenient location on your dash.
Run the wiring harness from the heater core fan to the switch and then to a power source.
Your kit will specify where to connect the positive (red) and negative (black) wires. Often, there’s an accessory power block under the hood. Always connect to a switched power source so the heater can’t run and drain your battery when the key is off.

Post-Install Checks and Best Practices for Peak Performance

You’re almost there! Don’t rush to hit the trail just yet. A few final checks are essential for a reliable system. This is your can am defender inferno heater install care guide for long-term success.

The All-Important Coolant Bleed

Air trapped in the cooling system is the number one cause of a heater not working correctly. This is the most critical post-install step.

Attach your spill-proof funnel to the radiator and fill it about halfway with fresh, correct-spec coolant.
Reconnect the battery. Start the Defender’s engine and turn the new heater fan on high with the temperature set to hot.
Let the engine idle. You will see air bubbles coming up through the funnel. This is called “burping” the system.
As the engine warms up and the thermostat opens, the coolant level will drop. Keep adding coolant to the funnel to keep it half full.
Continue this process until you stop seeing bubbles and feel hot air blowing from the vents. This can take 15-20 minutes.

Final Inspection

Once the system is bled, shut off the engine and let it cool completely. Top off the radiator and overflow tank to the proper levels.

With the engine off, meticulously check every single hose clamp and connection for leaks. Re-assemble your dash panels, and you’re officially done!

Troubleshooting Common Problems with Can Am Defender Inferno Heater Install

Even with a careful installation, you might run into a snag. Here are a few common problems with can am defender inferno heater install and how to solve them.

Problem: The heater blows cool or lukewarm air.
Solution: This is almost always caused by air trapped in the system. Repeat the coolant bleeding process. In some cases, you may need to briefly rev the engine (to around 2500 RPM) to help force air pockets out of the heater core. Also, double-check that you didn’t reverse the inlet and outlet hoses.
Problem: The fan doesn’t turn on.
Solution: Check your wiring. Ensure the ground wire has a clean, metal-to-metal connection. Check the fuse in the heater’s wiring harness. Use a multimeter to confirm you have power at the switch and at the fan motor itself.
Problem: I see a coolant leak.
Solution: Do not run the engine. Pinpoint the source of the leak. Most often, it’s a hose clamp that isn’t tight enough. Tighten the clamp and clean the area. Re-check after the next heat cycle.

Sustainable and Eco-Friendly Heater Operation Tips

Being a responsible off-roader means thinking about our impact. A sustainable can am defender inferno heater install is less about the installation itself and more about how you use and maintain your vehicle afterward.

An eco-friendly can am defender inferno heater install approach focuses on efficiency. A properly maintained engine heats up faster and runs more efficiently, meaning your heater works better without excessive fuel consumption. Regularly check your coolant levels and ensure there are no leaks, which can harm the environment. Avoid excessive idling just to warm up the cab; your Defender’s engine warms up best under a light load.

Frequently Asked Questions About Your Inferno Heater Install

How long does a Can-Am Defender Inferno heater install take?

For a first-timer with decent mechanical skills, plan for a solid 4-6 hours. An experienced mechanic can often do it in 3-4 hours. Don’t rush it; take your time and do it right.

Can I install the heater without draining all the coolant?

While you might be able to use hose pinch-off pliers to minimize coolant loss, it’s highly recommended to do a full drain and fill. This ensures you get fresh coolant in the system and makes the bleeding process more effective.

Does installing an aftermarket heater void my Can-Am warranty?

Generally, installing an aftermarket part does not automatically void your entire vehicle warranty. However, if the heater or your installation directly causes a failure of a factory component (like an engine overheat due to an improper coolant bleed), the repair for that specific failure may not be covered. When in doubt, check with your dealer.

Congratulations on tackling this project! You’ve just added a massive amount of comfort and capability to your rig. Now you can get out there and enjoy your Defender year-round, no matter the weather. Stay warm, stay safe, and happy trails!

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Thomas Corle

Founder & Automobile expert at FatBoysOffroad

Automobile expert and off-road enthusiast, sharing in-depth knowledge of vehicles, gear, and adventures. Helping readers make smart decisions and enjoy the thrill of off-roading safely and confidently.