Sub Zero thermostat and

[bgc]

On a Sub Zero 532 - the fresh food side is not cooling.

The evaporator was wet and the compressor was seldom running. I bypassed the thermostat control to allow the compressor to run for 2 hours, the evaporator got slightly frosted and the inside temp was at 35-40 degrees F.

Does this indicate a problem in the thermostat control or could it be related to the compressor?

And, I'm not sure if the interior fan is spinning fast enough, it seems fast but, I do notice it slows and then comes to an abrupt stop when the door is opened.

Would the abrupt stop indicate a faulty fan?

[R12rules]

Sub Zero .... nice frige. Never worked on one. Would love to though .. just to be able to say that I have.

They are like the Rolls Royce of appliances. They say; "You have arrived!"

Tell me ... is the vent slide open between compartments? Or does this system use twin compressors?

[bgc]

> Tell me ... is the vent slide open between compartments? > Or does this system use twin compressors?


It has 2 compressors. 2 dryer/filters. 2 drain hoses. 1 condenser with fan

Any ideas relating to the original question re potential thermostst and/or compressor problem?

[edward301]

I repaired a Sub Zero 501 Frezer a few years back,
and the problem was two fold. The evaporator fan
motor was going bad, it would slow down at random
times. The second problem was the fan blade was
pushed on the shaft too far, and was not getting
a good air seal around the fan shroud, therefore
some of the pushed air, was getting sucked back
again, and again. Not enough new air getting
pushed through the coils.

The blower motor does stop each time the door is
opened.

[bgc]

Edward301 said:

".. the fan blade was pushed on the shaft too far, and was not getting a good air seal around the fan shroud..."

Sub Zero Corp told me the distance from the fan up to the base should be 1 1/4" I measured it and it was 1 1/8" They said that 1/8" can affect cooling by 15 degrees F.

Question: How do you adjust the fan that is on the shaft?

[edward301]

On the 501 Freezer you simply slid the fan up, or down
the motor shaft. It had a c clamp that simply kept
it from moving. Very simple.