KitchenAid Pro Line KHEV01RSS Technical Education page 88

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 6-12. 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 7-1.
TEST #3c Heater Element
1. Unplug dryer or disconnect power.
2. Access the heater element by first re-
moving the toe panel. See Removing the
Toe Panel, page 6-14.
3. Use an ohmmeter to determine if the
heater element has failed. Remove har-
ness plugs. Measure resistance across
terminals.
• Readings should be between 7 ohms
and 15 ohms.
• If not, then replace the heater element.
IMPORTANT: Be sure all harness wires are
looped back through the strain relief after
checking or replacing the element.
TEST #4 Moisture Sensor
NOTE: This test is started with the machine
completely assembled.
This test is performed when an automatic cy-
cle stops too soon, or runs much longer than
expected.
NOTE: Dryer will shut down automatically af-
ter 2-1/2 hours.
The following items are part of this system:
• Metal sensor strips
• Machine control electronics
1. Enter the Diagnostic Test #1 mode. See
procedure on page 6-3.
2. If a continual beep tone is heard as soon
as the diagnostic mode is started, a short
circuit exists in the moisture sensor sys-
tem.
• If this doesn't happen, go to step 3.
• Otherwise, go to step 4.
NOTE: Over drying may be caused by a
short circuit in the sensor system.
3. Locate the two metal sensor strips on the
inside right wall of the door well. Bridge
these strips with a wet cloth or finger.
• If a continual beep tone is heard, the
sensor passes the test. Go to step 4.
• If a continual beep tone is not heard,
go to step 6.
4. Unplug dryer or disconnect power.
5. Access the machine control electronics.
Remove the connector P3 from the circuit
board. Measure the resistance across
terminals 9 and 10.
• If the ohmmeter does not indicate (in-
finity) open circuit, go to step 7.
• Otherwise, measure the resistance
across pins 9 and 10 of connector P3
on the machine control board. If a re-
sistance less than 1 MΩ is measured
(with analog or digital ohmmeter), in-
spect the control board for any debris
bridging these pins. If no debris, re-
place the machine control electronics.
6. Unplug dryer or disconnect power.
7. Access the moisture sensor by remov-
ing the 2 moisture sensor screws, then
disconnect the moisture sensor wire con-
nector.
6-10