37
Diagnostics
Table 16: Temperature Sensor to Resistance Measurement Chart
Temp F° Ohms Temp F° Ohms Temp F° Ohms Temp F° Ohms
0 85,378 33 31,738 66 13,138 99 5,961
1 82,710 34 30,855 67 12,811 100 5,827
2 80,135 35 30,000 68 12,493 101 5,697
3 77, 64 9 36 29,171 69 12,18 4 102 5,570
4 75,249 37 28,376 70 11,883 103 5,446
5 72,931 38 27, 58 9 71 11,591 104 5,326
6 70,693 39 26,834 72 11,3 07 105 5,208
7 68,531 40 26,10 3 73 11,031 106 5,094
8 66,442 41 25,394 74 10,762 107 4,982
9 64,475 42 24,706 75 10,501 108 4,873
10 62,475 43 24,039 76 10,247 109 4,767
11 60,592 44 23,393 77 10,000 110 4,663
12 58,771 45 22,766 78 9,760 111 4,562
13 57,012 46 22,158 79 9,526 112 4,464
14 55,311 47 21,568 80 9,298 113 4,368
15 53,667 48 20,996 81 9,077 114 4,274
16 52,077 49 20,441 82 8,862 115 4,18 3
17 50,540 50 19,902 83 8,651 116 4,094
18 49,054 51 19,379 84 8,448 117 4,007
19 47,616 52 18,872 85 8,250 118 3,922
20 46,225 53 18,379 86 8,056 119 3,839
21 44,880 54 17,9 02 87 7,8 6 8 120 3,758
22 43,578 55 17, 4 3 8 88 7,6 85 121 3,679
23 42,318 56 16,987 89 7, 5 07 122 3,602
24 41,099 57 16,550 90 7,333 123 3,527
25 39,920 58 16 ,125 91 7,16 4 124 3,453
26 38,778 59 15,713 92 7,000 125 3,382
27 37,672 60 15,312 93 6,839 126 3,312
28 36,602 61 14,923 94 6,683 127 3,243
29 35,566 62 14,545 95 6,531 128 3,177
30 34,563 63 14,178 96 6,383 129 3,112
31 33,591 64 13,822 97 6,238 130 3,048
32 32,650 65 13,475 98 6,098
77ºF (25ºC). This means, a sensor exposed to 77ºF
will show a resistance of 10,000 Ohms +/- 1%. As
the temperature decreases, the resistance increases.
Alternatively, as the temperature increases, the
resistance decreases.
Measurements will be made with the sensor
disconnected from the control board. Again, comparing
the results must be done against a calibrated tester.
A glass of water, mixed completely with ice chips and
given several minutes to settle should measure 32 to
32.4ºF. [0 - 0.2 ºC]
Apply resistance measurements to Table 15 and
compare to the control.
32º will have a resistance +/- 1% of 32,650 Ohms.
In the event Celsius is being used, the Fahrenheit
temperature will need to be converted.
ºC = (ºF - 32) * 5 / 9
Example using 82ºF
ºC = (82 - 32) * 5 / 9
ºC = (50) * 5 / 9
ºC = 250 / 9
ºC = 27.8
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