Amana B136CAL3 - Temperature Control Operation

February 1998 11 12074208
Electronic Functional Description
Temperature Control Operation
For any temperature setting, outputs will be turned
off/on based on cut-in/cut-out temperatures determined
by resistance levels of freezer and refrigerator
thermistors.
Refrigerator and Freezer Thermistor
Part # C8983701
Temp
°F (°C)
Resistance
Ohms
Temp
°F (°C)
Resistance
Ohms
-20 (-29) 495600 36 (2) 87510
-15 (-26) 418200 38 (3) 82740
-9 (-23) 354000 39 (4) 78300
-6 (-21) 300600 43 (6) 74100
-4 (-18) 256200 45 (7) 70170
5 (-15) 218850 46 (8) 66450
10 (-12) 187470 48 (9) 62970
16 (-9) 161040 50 (10) 59670
19 (-7) 138690 55 (13) 52290
25 (-4) 119760 61 (16) 45900
30 (-1) 103680 64 (18) 40410
32 (0) 97920 70 (21) 36540
34 (1) 92550 77 (25) 30000
As temperature decreases, resistance increases.
As temperature increases, resistance decreases.
Open thermistor or thermistor circuit will result in
failure of refrigerator to cool.
Shorted thermistor will cause refrigerator to run 100
percent of time except for defrost cycle.
• Freezer temperature setting and thermistor value
will determine if compressor/condenser fan and
evaporator fan switches are open or closed.
Compressor/condenser fan switch must be open for
6 minutes before switch can close again
(compressor dwell time).
• Refrigerator temperature setting and thermistor
value will determine if fresh food fan switch is open
or closed.
• Cut-out and cut-in temperature values must be
reached and maintained for 15 seconds before
output state will change (digital delay).
• Refrigerator and freezer control calibration can be
adjusted in Program Mode B.
Factory set freezer and refrigerator settings
Part # 120671001
Frozen
Food
Fresh
Food
Level
Cut-out
F° (C°) ±
1.5°
Cut-out
F° (C°) ±
1.5°
-10 (-23) 29 (-2) 9
-8 (-22) 31 (-0.6) 8
-6 (-21) 33 (-0.6) 7
-5 (-21) 34 (1) 6
-4 (-20) 35 (2) 5
-3 (-19) 36 (2) 4
-2 (-19) 37 (3) 3
0 (-18) 39 (4) 2
2 (-17) 41 (5) 1
-10 (-23) ---- Max Ref
---- 29 (-2) Max Frz