You may still be basking in an Indian Summer, but you can be sure winter isn’t far away. If your RV is to be really ready to take you into the great outdoors this fall and winter, you’ll want your furnace tuned up and ready to keep your toes warm. It’s not difficult and it’s quick to do. While the specifics of our piece have to do with “contemporary” RV furnaces, the principles apply to more geriatric furnaces as well.
We recommend you set the thermostat to “off” before you get inside the machine. From there it’s a step outside with a screwdriver to remove the outer cover from the furnace. After you’ve removed the screws from the cover you may need to gently pry the cover loose, as at times it will stick to the caulk used to seal out the weather.
With the outer cover off, you may find an inside panel covering the furnace motor and control board; if there is one, it will probably be hinged so you can simply drop it down, exposing your furnace innards.
Locate the control board–in the photo here it’s on the left side of the furnace. A multi-wire connector attaches enough wires to the board to make an octopus proud. Carefully pull the connector loose from the board and remove any dust or fuzz from the connector. A shot of “canned air” through each of the connector sockets will get any dirt out of them, ensuring good electrical connections. Give a shot to the connectors on the board and snap the connector back into place.
Now follow the wires snaking through the rest of the furnace compartment. Wherever you find a wire connection, check it to ensure the wire connectors are tightly mated together.
Turn your attention now to the lower right side of the photo. That silver-tipped pipe-like object you probably already recognize as the furnace’s breathing aparatus. Outside air is drawn in through it for combustion, and exhaust gases are sent back out via the same tube. Unfortunately some bugs find these tubes attractive and will take up residence therein. Some wasps even construct fine homes, obstructing the free flow of air and gasses. Take a good look and evict any invaders or their possessions. A blast of canned air will also help rid the tube of other dirt or matter that could cause an obstruction.
Now replace the furnace cover(s) and snug down the cover screws. It’s time for a “smoke test.” Reset the thermostat to “call” for heat, and hopefully you’ll find your furnace is ready to help you ward off the chill of the season.
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