The key to having a trouble-free time with your furnace system is regular inspection for wear and tear. With some basic knowledge, this RV furnace maintenance can save RV owners money down the road by avoiding costly repairs. Of course, it’s always good to have
Good Sam Roadside Assistance in case anything goes wrong during your trip.
Make sure to turn the furnace to the off position before doing any maintenance to prevent the system from igniting and causing injury. About every 3-4 months, remove the outside access panel and examine the area for potential airflow restrictions like insect nests or road debris. Cleaning the outside access panel is best done using a vacuum or air compressor.
On top of the burner ignition spark plug (the Piezo igniter), there is a gap that should be 1/8th of an inch and your flame should be true blue. The Piezo igniter is the spark plug of the furnace system and over time carbon may build up on it, which requires cleaning with a wire brush.
Airflow is crucial to ensure proper furnace operation. Never store cargo around the furnace housing or on top of ducting, which prevents the unit from circulating air. Don’t obstruct the return air grill panel because reduced airflow can also result in overheating the system. Additionally, return air vents inside the RV must be regularly cleared of lint and pet hair to prevent build up that can affect the blower motor. After all, there are no filters in your furnace system.
Issues ranging from faulty wiring to a fuse shortage can result in a malfunction of the blower motor. If the blower motor fails to run or operates slowly, check the battery voltage because the furnace typically requires a bare minimum of 10.5 volts. If in doubt, consult a technician (Good Sam Roadside Assistance’s Platinum and Platinum+ programs offer access to an RV tech) for assistance in identifying the problem.
A sail switch in the system controls electrical current through the furnace circuit board. Once it is engaged, it will clear all the excess gas and signal the furnace to ignite. Low voltage can be created through weak batteries or insufficient shore power supplies from a tripped breaker, which prevents the switch from opening. Turn off the system at the thermostat and confirm power or start the generator before turning the thermostat back on.
Another problem may be low gas pressure, which could manifest itself as the motor blower running without the burner igniting. It’s best to consult a technician if you are experiencing problems with gas pressure.
Of course, make sure the outside cargo doors remain closed when the furnace is in operation to prevent potential damage to the paint or injury from burner heat.
During these winter months, it’s important to practice regular maintenance on your furnace so you’re not left out in the cold. However, if you do find yourself without heat, you can always contact Good Sam Roadside Assistance. Even if you don’t need a tow, Good Sam Roadside Assistance’s Platinum and Platinum+ programs offers access to an RV tech">Good Sam Roadside Assistance can dispatch a mobile mechanic for minor RV repairs.
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Photo: Bo Gordy-Stith