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TROUBLESHOOTING GUIDE
NuTone
Trouble
1. Loss or decrease of
vacuum occurs.
2. Power unit does
not start.
3. Power unit fails to
stop when the hose
is removed.
NUTONE MODEL CV-352 SHOWN.
YOUR ACTUAL UNIT MAY VARY IN APPEARANCE.
Inlet
switch
Exhaust
guard
Mounting
bracket
Exhaust and
exhaust
coupling
Intake and
intake
coupling
Polarized
3-pronged
plug
Gasket
Canister
latch
6-gallon
disposable
soil bag
Secondary
safety filter
Bag
adapter
Inlet
Read Before Calling Service Center
Possible Cause
1a. Disposable bag filled.
1b. Obstruction in the hose. A blockage
in the hose can be determined by
inserting the hose into any Wall Inlet
and, while Power Unit is running,
check each additional inlet for
normal suction by holding the palm
of your hand over the open inlet. If
normal suction is felt at all other
inlets, insert the hose into a second
inlet. If the blockage still exists it is
located in the hose. However, if the
blockage does not occur when the
hose is changed, the blockage is
probably located in the tubing
system leading to the original inlet.
1c. Obstruction in the tubing system
inside the walls.
1d. Wall Inlet cover not properly sealed.
2a. Defective inlet.
Check other Wall Inlets.
2b. Thermoprotector has been activated.
2c. Blown fuse or tripped circuit breaker.
3a. An electrical short has occurred
somewhere in the system.
Possible Remedy
1a. Remove disposable bag and install
replacement.
Note: Check secondary filter for possible dirt and
dust accumulation and wash to clean if necessary.
1b. Disconnect the hose from the wall Inlet and
insert a blunt instrument into the hose – slightly
smaller in diameter – such as a flexible garden
hose. Push the garden hose through the
cleaning system hose until the obstruction has
been cleared.
2b. Check the overload protector button located on
the front of the Power Unit.
(Push to reset system.
1c. Insert hose end into any inlet with Power Unit
running, place the palm of your hand over the
opposite end of the hose. When you can feel the
suction increase, hold your hand over the hose
end for a few seconds and then quickly remove
your hand. This procedure repeated several time
should clear the obstruction. If the blockage is
not cleared, service will be necessary.
3a. A complete check of all Wall Inlet and Power
Unit low voltage control lead connections
(external yellow leads). Turn system off by
removing fuse or tripping circuit breaker at
house fuse box.
1d. Check all Wall Inlet covers to be sure they are
closed and sealed tightly.
2a. Replace defective Wall Inlet.
2c. Replace fuse or reset circuit breaker.