Maytag Bravos MED6300TQ Technical Education page 97

• With the door properly closed, the ohm-
meter should indicate a closed circuit
(0–2 ohms).
• If not, replace the door switch assem-
bly. See Figure 12, and Removing the
Front Panel/Drum Assembly.
TEST #4 Heater
This test is performed when either of the fol-
lowing situations occur:
• Dryer does not heat
• Heat will not shut off
This test checks the components making up
the heating circuit. The following items are
part of this system:
• Harness/connection
• Heater relay
• Thermal cut-off
• Thermal fuse
• High limit thermostat
• Gas burner assembly
• Centrifugal switch
• Exhaust thermistor
• Machine control electronics
• Gas supply
Dryer does not heat:
Locate the components using Figure 1 and
Figure 10.
Drum
Light
Lint
Duct
Sensor
Harness
Wires
Connection
4 Duct
Screws
Thermal
Exhaust
Thermistor
Figure 10. Thermal components, viewed from rear.
High Limit
Thermostat
Thermal
Cut-Off (TCO)
Fuse
1. Unplug dryer or disconnect power.
2. Remove the back panel to access the
thermal components. See Removing the
Back Panel.
3. Perform TEST #4b. If the thermal fuse is
OK, go to step 4.
4. Perform TEST #4c. If the thermal cut-off
is OK, go to step 5.
5. Locate the high limit thermostat. See Fig-
ure 10. Measure the continuity through it
by connecting the meter probes on the
red wire and blue wire terminals.
• If there is an open circuit, replace the
high limit thermostat and thermal cut-
off.
• Otherwise, go to step 6.
6. Perform TEST #4d. If this is OK, replace
the machine control electronics.
Heat will not shut off:
1. Unplug dryer or disconnect power.
2. Access the machine control electronics,
remove the P14 connector, then measure
the resistance between P14-3 (red-white
wire) and P14-6 (red-white wire) at the
connector. See Figure 16, for connector
location; and Accessing & Removing the
Electronic Assemblies.
• If 5–15 kΩ are measured, replace the
machine control electronics.
• If the resistance is greater than 20 kΩ,
replace the exhaust thermistor.
TEST #4a Exhaust Thermistor
The machine control electronics monitors
the exhaust temperature using the exhaust
thermistor, 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. Start the Timed Dry cycle.
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