Filter
Top Products
Manual 2100-455A
Page 21 of 25
CHECKING TEMPERATURE SENSOR
OUTSIDE UNIT CIRCUIT
1. Disconnect temperature sensor from board and from
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 then it should be replaced.
F R F R F R
-25.0
-24.0
-23.0
-22.0
-21.0
-20.0
-19.0
-18.0
-17.0
-16.0
-15.0
-14.0
-13.0
-12.0
-11.0
-10.0
-9.0
-8.0
-7.0
-6.0
-5.0
-4.0
-3.0
-2.0
-1.0
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
11.0
12.0
13.0
14.0
15.0
16.0
17.0
18.0
19.0
20.0
21.0
22.0
23.0
24.0
196871
190099
183585
177318
171289
165487
159904
154529
149355
144374
139576
134956
130506
126219
122089
118108
114272
110575
107010
103574
100260
97064
93981
91008
88139
85371
82699
80121
77632
75230
72910
70670
68507
66418
64399
62449
60565
58745
56985
55284
53640
52051
50514
49028
47590
46200
44855
43554
42295
41077
25.0
26.0
27.0
28.0
29.0
30.0
31.0
32.0
33.0
34.0
35.0
36.0
37.0
38.0
39.0
40.0
41.0
42.0
43.0
44.0
45.0
46.0
47.0
48.0
49.0
50.0
51.0
52.0
53.0
54.0
55.0
56.0
57.0
58.0
59.0
60.0
61.0
62.0
63.0
64.0
65.0
66.0
67.0
68.0
69.0
70.0
71.0
72.0
73.0
74.0
39898
38757
37652
36583
35548
34545
33574
32634
31723
30840
29986
29157
28355
27577
26823
26092
25383
24696
24030
23384
22758
22150
21561
20989
20435
19896
19374
18867
18375
17898
17434
16984
16547
16122
15710
15310
14921
14544
14177
13820
13474
13137
12810
12492
12183
11883
11591
11307
11031
10762
75.0
76.0
77.0
78.0
79.0
80.0
81.0
82.0
83.0
84.0
85.0
86.0
87.0
88.0
89.0
90.0
91.0
92.0
93.0
94.0
95.0
96.0
97.0
98.0
99.0
100.0
101.0
102.
0
103.0
104.0
105.0
106.0
107.0
108.0
109.0
110.0
111.0
112.0
113.0
114.0
115.0
116.0
117.0
118.0
119.0
120.0
121.0
122.0
123.0
124.0
10501
10247
10000
9760
9526
9299
9077
8862
8653
8449
8250
8057
7869
7686
7507
7334
7165
7000
6840
6683
6531
6383
6239
6098
5961
5827
5697
5570
5446
5326
5208
5094
4982
4873
4767
4663
4562
4464
4367
4274
4182
4093
4006
3921
3838
3757
3678
3601
3526
3452
TEMPERATURE F VS RESISTANCE R OF TEMPERATURE