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Ice Formation Patterns
1. Normal Ice Formation
Ice forms across the entire evaporator surface.
At the beginning of the Freeze cycle, it may appear
that more ice is forming at the evaporator inlet, than on
the evaporator outlet. At the end of the Freeze cycle,
ice formation at the outlet will be close to, or just a bit
thinner than, ice formation at the inlet. The dimples in
the cubes at the outlet of the evaporator may be more
pronounced than those at the inlet. This is normal.
The ice thickness probe must be set to maintain the
ice bridge thickness at approximately 1/8 in. If ice
forms uniformly across the evaporator surface, but
does not reach 1/8 in. in the proper amount of time,
this is still considered normal.
2. Extremely Thin at Evaporator Outlet
There is no ice, or a considerable lack of ice formation,
at the evaporator outlet.
Examples: No ice at all at the evaporator outlet, but ice
forms on the rest of the evaporator. Or, the ice at the
evaporator outlet reaches 1/8 in. to initiate a harvest,
but the rest of the evaporator already has 1/2 in. to 1
in. of ice formation.
Possible cause: Water loss, low on refrigerant, starving
TXV, hot water supply, faulty water fill valve, etc.
3. Extremely Thin at Evaporator Inlet
There is no ice, or a considerable lack of ice formation
on the evaporator inlet. Examples: The ice at the
evaporator outlet reaches 1/8 in. to initiate a harvest,
but there is no ice formation at all on the evaporator
inlet.
Possible cause: Insufficient water flow, flooding TXV,
etc.
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