UD-35 SERVICE UPDATE FIRST HALF—2009 - Whirlpool

Original Large Reservoir
Dispenser drip
KABIR UPDATE -2009
ICE AND WATER UPDATE
2327509
Verify the 2327509 tank is installed. This is the smaller baffle tank. See figure 1.
Verify the inlet and outlet is installed correctly from the reservoir tank. The correct
inlet and outlet connections are Critical to ensure dispenser dripping is minimized.
The 2314271 with 5/16” check valve has been helpful at both the door union (Tline
models) and tapped into the line right after the reservoir outlet connection.
Removing the ARD on the M line will help. Use regular ¼ tubing. You will need
a bracket at the top in the dispenser to hold the tube. The water reservoir tank,
2327509, has dramatically reduced our dispenser drip calls. Make sure the
technicians are using this smaller baffle tank as a service part, not the larger
baffle tank. The larger baffle tank does not improve dispenser drip as well as the
2327509 tank does.
39
Inlet
Figure 1
ICE CUBES STICKING TOGETHER
Infrequent Use
Outlet
Ice cubes will stick together over time. Customers that dispense ice infrequently
(more than a week or so between dispensing) will notice this because it is normal.
This is probably the most common cause of cube clumping complaints. Look for
cubes which otherwise appear fairly normal (although over long periods of time some
frost may build). Sublimation and melting occur at the molecular level even at temperatures
which remain well below freezing. The water molecules condense and
refreeze back on the cubes and this will cause cubes to freeze together at points of
contact.
The main points to take away from this are:
Neither warm temperatures nor airflow are necessary for ice cubes to stick together.
Over time, this will occur even at extremely cold temperatures. The cause is that
molecules of water (ice) on adjacent cubes of ice join into the same ice crystal at the
point of contact. The size and strength of the bonds grow with time. It begins happening
immediately, but is at first too weak to notice. Use of the dispenser drives an
auger motor which breaks up bonds, at least until they have grown too strong.