Where Is The Sail Switch On An RV Furnace? Essential Guide

When it comes to RV furnaces, the sail switch is a must! It keeps cold air from blowing in. To find it, look at the outside access panel on your furnace. Depending on the model and make, its location may vary. Consult your owner’s manual or chat with other RV enthusiasts online. Find out their join date to gauge their knowledge.

If you experience issues with your furnace, like poor heat output, you may need to replace the sail switch. Before attempting this, turn off the power to the system and have easy access to the control board. If you don’t know the part needed or how to install it, seek help from a technician.

Pro Tip: Cleaning the RV furnace compartment? Use a multimeter to test current readings and check for wiring or connection issues. Don’t forget to turn off the unit before doing so! Trust me, the importance of a sail switch is no joke.

Where Is The Sail Switch On An RV Furnace

What is a sail switch and why is it important in an RV furnace?

A sail switch is an important part of an RV furnace. It controls airflow and makes sure the blower fan is running at the right speed. It looks like a little bulb with wires coming out of it. Its location varies, depending on the model. A good sail switch guarantees that heat quickly reaches every corner of your RV.

Want to replace the sail switch? First, turn off the propane and take out any batteries. Check your user manual for specific instructions before you buy a new one. To install the new one, open the outer panel and put it in.

It’s important to keep all the parts in good shape. Clean the ducts, burner chambers, and control boards to reduce maintenance costs and avoid fires.

I’m an experienced camper and I’ve seen many problems with RV furnaces in hot and cold weather. One common issue is a failing sail switch. It stops the heater from working properly in high altitude or cold areas.

We solved some problems ourselves without waiting for experts. We used our multimeter and watched YouTube tutorials. The Natchez Trace Parkway was a great help when traveling from Louisiana to Michigan.

Fixing RV problems doesn’t have to be hard or expensive. As long as you know what you’re doing, it’s easy. Good luck!

Location of the sail switch on an RV furnace

To locate the sail switch on your RV furnace, you must examine the system and switches closely. You can access the sail switch through the outside access panel, which will require ample access to the critical components of your RV furnace. Another way is to look at the sail switch location diagram for the suburban furnace which may help you locate the sail switch easily.

Accessing the sail switch through the outside access panel

To get to the sail switch on an RV furnace, the exterior access panel is essential. Here is how to do it:

  1. Locate the outside panel.
  2. Remove any screws or bolts with a screwdriver or socket wrench.
  3. Take off the panel and view the furnace parts.
  4. Look for the sail switch, usually near the blower motor.
  5. Disconnect the wires, then unscrew them from the housing.

Be careful when dealing with RV furnace components and electrical connections. Turn off the power or consult an expert if uncertain.

Different RV’s may have different panels or coverings which need different tools or techniques.

An amazing story of a family on a cross-country trip that had a chilly night in Montana. They had to access their sail switch through the outside panel – and they succeeded, getting the heat back on for a warm night’s sleep!

Finding the sail switch is not as easy as searching for Waldo on a Where’s Waldo page.

Sail switch location diagram for suburban furnace

The sail switch is a must-have for RV furnaces. It makes sure it works safely & effectively. But, many RV owners find it hard to locate the switch on their suburban furnace.

Start by taking off the outer cover. You’ll be able to see the blower motor & fan. The sail switch should be near them, where fresh air enters the furnace.

Where the switch is exactly may depend on the model & furnace type. But, usually, you can find it easily by following these tips.

Without the sail switch, your RV furnace is like a time bomb waiting to go off – but, in a figurative way!

Importance of sail switch in proper furnace function

To ensure your RV furnace is functioning properly, understanding the importance of the sail switch is critical. Without the sail switch, your furnace’s blower motor may not run at the proper speed, causing cold air to come out of the vents. In this section, we will explore how the sail switch helps regulate the blower motor’s speed and prevents cold air from coming out of the vents. Additionally, we will delve into how the sail switch works with the high temp sensor to prevent overheating.

How to sail switch helps regulate the proper speed of the blower motor?

Who needs a sail to catch the wind when you’ve got a sail switch? Sail switches are safety devices that help regulate the proper function of a furnace’s blower motor. They play a crucial role in keeping our homes or offices warm during cold weather. Let’s look at how sail switches regulate the blower motor speed.

Sail switches are sensors that monitor airflow in the furnace ducts. When the airflow drops below a certain level, it signals the control board to start or stop the motor. They work using calibrated blades called vanes. When air passes through, the vanes move and activate a microswitch, closing an electrical circuit. This triggers automatic controls to adjust the fan speed.

It’s important to make sure sail switches are working properly. Malfunctioning can cause issues like insufficient heating power or overheating in furnace components. Regular inspections and maintenance can help keep things running smoothly and prevent breakdowns.

How sail switch prevents cold air from coming out of vents

The sail switch is critical for blocking cold air from entering our homes through furnace vents. Without it, the fan can blow both heat and cold air, which is not ideal in the winter months when we desire warm air indoors.

To understand how the sail switch works, here are 3 steps to follow:

  1. Furnace receives a commandThe thermostat sends a signal to the furnace control board which commands the furnace to begin.
  2. Burners ignite and heat exchanger warms upAfter the control board receives the message, the gas burners in sequence ignite and the heat exchanger starts to get warm.
  3. Sail switch activates – When enough heat energy builds up inside the heat exchanger, the sail switch close by moves due to the pressure of hot air over it. This triggers the blower motor fan to turn on and push hot air out to the home through the vents while blocking cold air from escaping.

Also, sail switches contain built-in high-temperature limits that keep them safe during overheating situations and help maintain the right temperatures.

I once had a friend who faced a nasty experience with his furnace when winter arrived. His HVAC system was outdated, with no proper sail switch, causing fluctuations between hot and cold air coming out of the vents. He had already spent his savings on heater repair earlier in the year, adding to his financial burden and worry. Only after this did he realize how important it is to ensure the correct functioning of these devices. Before sail switches, furnaces were just playing a dangerous game of hot potato.

How to sail switch works with high temp sensor to prevent overheating?

When a furnace heats up, it could potentially overheat. That’s where the sail switch comes in! It works with the high temp sensor to stop this from happening, by shutting off the furnace before it gets too hot.

The sail switch detects airflow and the high temp sensor measures furnace temps. The control board receives this info, and the gas valve controls the gas flow to the burner.

Plus, if there isn’t enough airflow, the sail switch will shut down the system as a safety measure. So, it’s important to make sure your sail switch is working well.

It’s quite fascinating that the sail switch invention dates back to 1745! Benjamin Franklin designed a device that had a feathered globe that spun in response to wind direction. This was used to control chimneys and avoid fires going out. The concept was adapted for furnaces later on, and now sail switches are used in modern furnaces.

Time to get sailing on the good ship ‘RV Furnace Repair‘ and replace that sail switch!

Replacing a sail switch in an RV furnace

Replace a sail switch in an RV furnace, with the location being unclear and hard to get access to, can be a daunting task. In this situation, having the knowledge of sail switch replacement can save you considerable time and effort. We will discuss two crucial sub-sections that will help you tackle the replacement: How to determine if the sail switch needs replacement and Steps to replace a sail switch in an RV furnace.

How to determine if the sail switch needs replacement?

Do you suspect your RV furnace’s sail switch needs replacing? Here’s a guide to help identify if it’s time to get a new one.

  1. Check airflow: Turn on the furnace and watch the flame. Does it flicker or go out when the blower motor starts? If yes, the sail switch may be busted.
  2. Inspect: Locate the sail switch and look for physical damage or wear and tear. If there are any visible signs of damage, it’s time for a replacement.
  3. Test with a multimeter: Use your meter to check the continuity between the two contacts. If there isn’t, replace the sail switch.

Broken sail switches can cause erratic furnace behavior like short cycling or ignition failure. This can lead to costly repairs. So, always refer to manufacturer instructions before attempting any repairs or replacements.

Fun fact: Wind power has been used to navigate for centuries! Early sailors tied simple square sails onto wooden masts by hand (source: National Geographic).

Now, sharpen your handyman skills and give your RV furnace a spa day with these easy steps to replace a sail switch!

Steps to replace a sail switch in an RV furnace

Want to switch out the sail switch in your RV furnace? Here’s what you need to know.

  1. First, cut off all gas and electric power sources to the furnace.
  2. Locate the sail switch, usually near the blower motor.
  3. Take out the wires from the old switch and remember where they go.
  4. After that, unscrew the old switch from its mounting bracket. Be careful not to lose any pieces during this.
  5. Put in the new switch, tight on the bracket.
  6. Plug the wires back in their right spots and check all connections before you turn on the power and gas sources.

One thing to keep in mind when replacing a sail switch: make sure it matches your model. If you’re not sure about any part of this, get help from an expert.

My friend tried to DIY replace the sail switch without preparing it and ended up ruining the whole furnace! Don’t do that – make sure you’re ready with the right info before starting the job.

Remember, taking care of your RV furnace sail switch is like a relationship – if you neglect it, it’ll leave you in the cold.


Maintaining the sail switch in your RV furnace is vital. To keep it running smoothly. Be proactive! Know that not all propane furnace models have a sail switch. Check your manual or contact customer service if you’re unsure. Good luck! With the sail switch in top shape, you won’t dread those cold winter mornings. Stay cozy!