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Cleaning the Evaporator
Proper maintenance and cleaning of the supplied,
washable air fi lter should prevent the evaporator
from getting dirty. However, should the evaporator
become dirty, it must be cleaned to maintain
performance of the heat pump. Care should
be taken during cleaning not to damage the
evaporator fi ns. If the fi ns become bent, use a fi n
straightening tool (12-fi ns per inch) to re-align the
fi ns.
The most effective way to clean the evaporator
is to use a commercially available spray cleaner
intended for cleaning air conditioner evaporators.
Select a product that is compatible with plastics
such as ABS and high impact polystyrene and is
a no rinse product intended for indoor use. Follow
the procedure below for best results.
1. Shut off power to the unit at the breaker or
fuse box prior to servicing the unit.
2. Remove the air inlet and outlet grills.
Important: Do not spray cleaner on the fan
motor.
Figure 18
3. Loosen and remove the four (4) nuts that
mount the fan assembly to the fan shroud.
Lower the fan assembly and carefully rest it
in the area adjacent to the condensate pan.
Cover the fan assembly to protect the motor
from the evaporator cleaner.
Important: Do not damage the fan blades.
4. Cleaner should be applied to the inlet (left)
side of the evaporator only. Spray evaporator
cleaner on the evaporator working from the
top down. Do not over apply cleaner; use only
enough to clean the evaporator.
5. Clean the fan blades by carefully wiping each
one with a damp cloth.
6. Clean the condensate pan by wiping with a
damp cloth to remove any dirt that may be
present.
7. Re-install the fan assembly and both side
panels.