Thor Motor Coach Class B+ Owner's Manual page 139

Winter Use and Storage
138
Curtains
Close all the drapes and curtains, and protect the curtains from
sun fading by placing foil or paper between the windows and the
& Blinds
curtains/blinds.
Close and lock. Inspect and reseal if necessary.
Windows
Holding Tanks
Drain and rinse. Close valves. Add a small amount of RV
antifreeze to keep valves and gaskets lubricated.
Pour a cup of RV antifreeze down all drains. Wipe all fixtures
Drain Traps
clean.
Clean. Leave both doors propped open. Cover exterior panels
Refrigerator
and roof vents. Leave an opened box of baking soda inside the
refrigerator to prevent any musty odors from accumulating.
Refer to your refrigerator owner's manual for proper winterization
Ice Maker
procedures.
Air Conditioner
Remove air filters and clean or replace. Cover shroud.
Roof
Must be kept clear of significant snow accumulation or damage
may occur. Inspect and reseal if necessary.
Vents
Check all furnace, refrigerator, range hood, A/C, etc. vents and
close securely. Cover or tape up to prevent mice or insects
from building nests that can disturb the air flow and keep the
appliances from functioning properly.
Sinks
Clean and then pour one cup of nontoxic RV antifreeze into the
& Showers
drains to prevent freezing. Wipe all fixtures clean.
Batteries
Add distilled water and recharge if necessary. If possible, remove
batteries and store them in a cool dry place (approximately 50
– 60° F). Check them periodically and recharge as needed. Be
sure that both the chassis and auxiliary (house) batteries have
the proper electrolyte level and that they are fully charged. A
discharged battery will freeze and may crack the case, causing
severe damage to the battery and surrounding area. In storage,
a battery will lose charge gradually over a 30 to 45 day period,
even when disconnected by the use of the Battery Disconnect
Switch. We recommend that the batteries be checked for charge
at least monthly. You may wish to remove the batteries from the
motorhome and store them in a heated area. However, even
when warm, the battery charge level must still be maintained. A
warm battery accepts charge much more readily than a cold one.
Fuel
Store with the tank full to prevent condensation buildup.
Dash
Run for a short period of time to assure the compressor seal is
lubricated.
Air Conditioner
Interior
Check the interior of the motorhome monthly while in storage
to make sure leaks have not developed, or condensation has
not formed that can cause damage to interior components.
Condensation can most readily be observed as moisture
accumulation on windows and mirrors. To reduce condensation,
make sure to air out the motorhome occasionally during storage.
Keep the battery vent caps in place during storage and
prohibit smoking, welding, and other work involving the
use of flames in the area.