Manual 2100-578L
Page
34 of 42
CHECKING TEMPERATURE SENSOR
1. Disconnect temperature sensor from board and
from right-hand outdoor coil.
2. Use an ohmmeter and measure the resistance of
the sensor. Also use ohmmeter to check for short
or open.
3. Check resistance reading to chart of resistance use
sensor ambient temperature. (Tolerance of part is
±10%.)
4. If sensor resistance reads very low, then sensor is
shorted and will not allow proper operation of the
heat pump control.
5. If sensor is out of tolerance, shorted, open or reads
very low ohms, it should be replaced.
TABLE 6
Temperature (F) vs. Resistance (R) of Temperature Sensor
F
R
F
R
F
R
F
R
-25
196871
13
56985
51
19374
89
7507
-24
190099
14
55284
52
18867
90
7334
-23
183585
15
53640
53
18375
91
7165
-22
177318
16
52051
54
17989
92
7000
-21
171289
17
50514
55
17434
93
6840
-20
165487
18
49028
56
16984
94
6683
-19
159904
19
47590
57
16547
95
6531
-18
154529
20
46200
58
16122
96
6383
-17
149355
21
44855
59
15710
97
6239
-16
144374
22
43554
60
15310
98
6098
-15
139576
23
42295
61
14921
99
5961
-14
134956
24
41077
62
14544
100
5827
-13
130506
25
39898
63
14177
101
5697
-12
126219
26
38757
64
13820
102
5570
-11
122089
27
37652
65
13474
103
5446
-10
118108
28
36583
66
13137
104
5326
-9
114272
29
35548
67
12810
105
5208
-8
110575
30
34545
68
12492
106
5094
-7
107010
31
33574
69
12183
107
4982
-6
103574
32
32634
70
11883
108
4873
-5
100260
33
31723
71
11591
109
4767
-4
97064
34
30840
72
11307
110
4663
-3
93981
35
29986
73
11031
111
4562
-2
91008
36
29157
74
10762
112
4464
-1
88139
37
28355
75
10501
113
4367
0
85371
38
27577
76
10247
114
4274
1
82699
39
26823
77
10000
115
4182
2
80121
40
26092
78
9760
116
4093
3
77632
41
25383
79
9526
117
4006
4
75230
42
24696
80
9299
118
3921
5
72910
43
24030
81
9077
119
3838
6
70670
44
23384
82
8862
120
3757
7
68507
45
22758
83
8653
121
3678
8
66418
46
22150
84
8449
122
3601
9
64399
47
21561
85
8250
123
3526
10
62449
48
20989
86
8057
124
3452
11
60565
49
20435
87
7869
12
58745
50
19896
88
7686