KitchenAid Pro Line KHEV01RSS Technical Education page 102

TEST #3a Temperature Sensor
The machine control electronics monitors the
exhaust temperature using the temperature
sensor, and cycles the heater relay on and off
to maintain the desired temperature.
Begin with an empty dryer and a clean lint
screen.
1. Plug in dryer or reconnect power.
2. Set the following configuration:
• Door must be firmly closed.
• Select Timed Dry cycle.
• Press Cycle End Tone and select
Loud.
• Press Start.
3. If after 60 seconds, E1 or E2 flashes in
the display and the dryer shuts off, the
temperature sensor or wire harness is ei-
ther shorted or open.
• Unplug dryer or disconnect power.
• Check wire connections at the machine
control electronics and temperature
sensor. See Accessing & Removing
the Electronic Assemblies, page 6-28,
and Figure 6 for temperature sensor
location.
• If wire connections are good, remove
the two wires from the temperature
sensor and replace the temperature
sensor. See Figure 6.
• Plug in dryer or reconnect power.
4. If E1 or E2 does not flash in the display,
the connections to the temperature sen-
sor are good. Therefore, check the tem-
perature sensor's resistance value at any
or all of the temperature levels in ques-
tion, using the Timed Dry cycle, and the
following process:
Hold a glass bulb thermometer capable of
reading from 32° to 82°C (90° to 180°F)
in the center of the exhaust outlet. The
correct exhaust temperatures are as fol-
lows:
EXHAUST TEMPERATURES
TEMP.
SETTING
Extra High
High
Medium
Low
Extra Low
* The measured overshoot using the glass
bulb thermometer in the exhaust outlet can
be 17°C (30°F) higher.
5. If the exhaust temperature is not within
specified limits, go to the Operational
Test to verify the temperature sensor is
functional.
TEST #3b Exhaust High Limit
Manual Reset
1. Unplug dryer or disconnect power.
2. Access the machine control electronics.
See Accessing & Removing the Electron-
ic Assemblies, page 6-28. Measure the
resistance across P3-3 and P3-4.
• If the resistance across P3-3 and P3-4
is 1–6 ohms, replace the machine con-
trol electronics.
• Otherwise, go to step 3.
3. Check the wiring and connectors in the path
between these measurement points by re-
ferring to the wiring diagram on page 7-2.
6-24
HEAT HEAT
TURNS OFF* TURNS ON
°C (°F) °C (°F)
73.9° ± 3°
(165° ± 5°)
71.1° ± 3°
6–8°
(160° ± 5°)
(10–15°)
65.6° ± 3°
below the
(150° ± 5°)
heat turn off
57.2° ± 3°
temperature
(135° ± 5°)
48.9° ± 3°
(120° ± 5°)