TM 10-8145-222-23
0020
TEST
Compressor Discharge Temperature Sensor
1. Remove CDT sensor (Figure 1, Item 2) per this WP.
2. Set multimeter to check for ohms.
3. Place sensor in bucket of ice water. Stir rapidly.
NOTE
Due to variations and inaccuracies in ohmmeters, thermometers or other test
equipment, a reading within 2% +/- variance of the chart value would indicate a good
sensor.
4. Measure ohms and convert to temperature using Table 1.
Ohms reading should read about 327,000 or 32F (0C). If not, replace CDT sensor per this WP.
If ohms reading is within allowable limits, continue to step 5.
Table 1. Resistance Chart (CDT).
Temperature
Temperature
F
C
OHMS
F
C
OHMS
-20
-28.9
1,653,000
100
37.8
58,000
-10
-23.3
1,178,000
125
51.7
34,690
0
-17.8
855,000
150
65.6
20,110
10
-12.2
624,000
175
79.4
12,970
20
-6.7
463,000
200
93.3
8,355
30
-1.1
345,000
225
107.2
5,605
32
0
327,000
212
100
7,000
40
4.4
262,000
250
121.1
3,793
50
10
199,000
275
135.6
2,650
60
15.6
153,000
300
149.4
1,895
70
21.1
119,000
325
163.3
1,358
80
26.7
93,000
350
177.8
1,202
90
32.2
73,000