THERMISTOR
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The thermistor monitors the exhaust temper- ature. The changes in thermistor resistance signals the electronics control, which cycles the
1. Turn the dryer off but keep the electrical |
8.Hold a glass bulb thermometer capable of reading from 32°C to 82°C (90°F to 180°F) in the center of the exhaust outlet. Mea- sure the exhaust temperatures with the heater on and off. The correct exhaust tem- peratures for the various settings are shown in the following chart.
TEMPERATURE | HEAT TURNS | HEAT TURNS |
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SETTING | OFF | ON |
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| supply connected. |
2. | Make sure that the dryer is empty and that |
| the lint screen is clean. |
3. | Close the dryer door. |
4. | Select Heavy Duty, Timed Dry, + or |
| Cycle End Signal (Loud), and Start. |
5. | If error codes E1 or E2 flash on the dis- |
| play after 1 minute and the dryer turns off, |
| the thermistor, or the wire harness, is ei- |
HIGH | 68° C ±6° | |
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(155° F ±10°) | ||
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MEDIUM | 60° C ±6° | |
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(140° F ±10°) | ||
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LOW | 52° C ±6° | |
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(125° F ±10°) | ||
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EXTRA | 41° C ±3° | |
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LOW | (105° F ±5°) | |
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6 - 8°C
(10 - 15°F)
below the heat
turn off
temperature
| ther shorted or open. Check the wire con- |
| nections at the thermistor or the electronic |
| control board. If wiring checks okay, re- |
| place the thermistor. |
6. | If the dryer seems to operate normally, re- |
| move the exhaust vent and start the dryer. |
7. | Select the desired temperature cycle to be |
| tested, and select 20 minutes of Timed Dry |
| heat using the + or – pushbuttons. |
9.If the exhaust temperature is not within the specified limits, check the resistance of the thermistor, as shown in the following chart. If the resistance is okay, replace the elec- tronic control board.
THERMISTOR RESISTANCE
TEMP | RESISTANCE | TEMP | RESISTANCE |
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°C (°F) | (K ohms ) | °C (°F) | (K ohms ) |
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10° (50°) | 19.9 | 43° (110°) | 4.7 |
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16° (60°) | 15.3 | 49° (120°) | 3.7 |
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21° (70°) | 11.9 | 54° (130°) | 3.1 |
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27° (80°) | 9.2 | 60° (140°) | 2.5 |
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32° (90°) | 7.4 | 66° (150° ) | 2.1 |
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38°(100° ) | 5.7 | 71° (160° ) | 1.7 |
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