Rv Furnace Blower Won’t Start

Rv Furnace Blower Won’t Start : Quick Troubleshooting

RV vacations shouldn’t be limited to a certain warm season. You might want to enjoy traveling in your RV around the year. 

But, what if your RV Furnace stopped working on a winter night when you’re on the road? Now, that would be a very horrible experience.

Even if you are facing it now, you need not worry. We’ve got you covered with this one-stop solution, where we tell you what to do when your RV Furnace blower won’t start.

Moreover, throughout the writeup, we’ll tell you why your RV Furnace blower isn’t working and how you can fix it. Hopefully, that’ll save you from the ruthless winter cold.

Try reading this while sipping on a hot beverage. It’ll help you think better if you’re out in the cold. So, let’s move right in and get some work done.

Things You’ll Need

Here are some of the things that you’ll need before you start fixing things:

Why The RV Furnace Blower Won’t Start?

The answer to this depends on what kind of RV Furnace you’re using. For example, if you’re using a propane furnace or a wall heater, it’s more likely to be a problem with the power supply.

So, in that case, you have to check the onboard battery first before moving to another spot. Moreover, there are other problems similar to this. 

To make the process easy for you, we have put together the most common problems when it comes to an RV Furnace blower not working

Here they are:

  1. Inadequate Power Supply
  2. Wiring Issue
  3. Battery Corrosion
  4. Damaged Wires
  5. Malfunctioning Thermostat

In the next section, we’ll talk about the problems, ways of diagnosing them, and their solutions. So, let’s start with the one we have already mentioned, the minor electrical failures.

Problem 1: Inadequate Power Supply

Firstly, we’ll talk about the problem of not having enough electric power. This is usually the cause in most cases when it comes to the blower not working.

The RV furnace typical blower needs a total of 8 amp-hour power. If the onboard battery is low on energy or damaged, the blower won’t have enough power to run.

So, what else happens if there isn’t enough power?

The thermostat, the center temperature control, will stop working. Which, eventually, leads to your RV furnace blower not working anyways.

So, you’ll want to get that checked first. It might also be a simple matter of circuit breaker tripping. So, you’ll want to check that too.


Fetch that voltmeter that we told you about. Now, turn it on and select DC voltage. Once you’ve done that, touch the red lead to the positive terminal and the black one to the negative.

You should be able to see a reading on the screen. We have provided a table below to tell you about the correct interpretation of your battery.

Battery Type Ideal Reading
6 V 6.25V – 6.35V
12 V 12.5V – 12.7V


Charge your battery if you get a reading below the ideal one. However, if you see no reading at all, the battery’s dead. Replace it.

And if it’s a case of circuit breaker tripping, flipping the switches back will do the trick.

Now, let’s move on to the next problem and look towards solving it.

Problem 2: Wire Issues 

Once you’re done checking the batteries, see if they are supplying enough energy. You should check the wires to look for damage or loose wires. Start by following the wires.


Following the wires can be hectic, so you’ll need some patience. You might also find a case of overload, short out, or damaged coat.


Once you have appropriately searched for the problem, if you find any faulty wires, replace them with new ones.


A lot of the time, batteries cannot function properly for battery corrosion. This happens when battery fluid leaks out and starts damaging the terminals.  


For finding the problem, search the battery terminals for the unusual buildup of any white, gray, or greenish material. Once you’ve seen it, move to the solution.


Battery corrosion can be solved in 5 easy steps. Here they are:

  1. Create a mixture of water and baking soda.
  2. Disconnect the wires from the corroded terminals. Be extra careful.
  3. Apply the baking soda water mixture on the terminal to scrub away the corrosion.
  4. Use a clean paper towel to wipe the terminal dry.
  5. Reconnect the wires to the terminals, to ensure power supply to the thermostat and furnace.

In the next section, we’ll talk about the last problem on our list, a malfunctioning thermostat.

Problem 4: Malfunctioning Thermostat

The thermostat is the brain of temperature control. So, if one of its components fails, there’s a good chance that your RV furnace blower will not work

It’s essential that you check the thermostat for any loose connections or faulty wires.


Start with the digital display panel. If it’s not showing any data or blinking, then we have a problem in our hands. 

If that’s the case, unscrew the panel to look for loose connections and faulty wires. Moreover, if your Thermostat is powered by batteries, check the batteries.

 Let’s move on to how we can solve the problems that we’ll find.


Start by fixing the loose connections and replacing the faulty wires. Change the batteries if needed. Once you’re done making the changes, screw the display panel back, and you’re good to go. 

The Conclusion

We know how horrible it feels if your RV Furnace Blower won’t start when you need it the most. That’s why we crafted this troubleshooting guide to help you out.

Now, if you see that the repairs are beyond your expertise, call an electrician. Hold out in the cold for a day or two, but don’t risk it.

We’ll be waiting for your feedback. You can let us know in the comments.

Till then, stay safe and drive responsibly.

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