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Bryan, Home Appliance Technician
Category: Appliance
Satisfied Customers: 12156
Experience:  15 yrs. experience as a certified appliance technician.
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Whirlpool Duet Gas Dryer Is Not Heating.

Resolved Question:

I have a Whirlpool Duet gas dryer which is not heating but running. The display comes on and the drum turns.

Model #: GGW9200LW0, S/N: MM3518408, TYPE: BADT-NAT-120600fi-EL22 .

Things I have tested so far:
Thermal fuse - Fine, both by meter and just connecting the wires.
ignitor - Test at 72 ohms of resistance.
Flame sensor - Zero ohms of resistance
High-temperature thermostat - Zero ohms
Thermistor - About 0.5 ohms

Things Replaced:
Gas Valve Solenoid Set

Submitted: 6 years ago.
Category: Appliance
Expert:  Bryan replied 6 years ago.

Welcome to JustAnswer

Are you saying you get continuity through the flame sensor and the high limit thermostat?

Does the igniter glow at all?

Did you test voltage to the igniter?

Customer: replied 6 years ago.

Yes, continuity on both flame sensor and the high limit thermostat are fine.

The igniter DOES NOT glow at all. I tested the igniter with the meter in Ohms mode (72 ohms reading).

Is the voltage test different? If yes, please explain how it is done?


Expert:  Bryan replied 6 years ago.

The voltage test is different.

You need to unplug the igniter and set you meter on voltage, put one probe in each of the two connectors on the igniter plug and start the dryer. You should get 120 volts to it.

If you do then the igniter is defective, if not there may be another problem.

Let me know what you find.

Customer: replied 6 years ago.
Tested the plug that connects to the igniter with dryer ON getting zero volts!
However, the igniter itself tests good and looks good, testing with 74 ohms of resistance(swithced back the ohms mode on the meter).
Did I miss something here?
Expert:  Bryan replied 6 years ago.

No you didn't miss anything. It sounds like the igniter is fine but you are just not getting power to it.

Are you absolutely sure you get continuity through the flame sensor? Are you testing these with the wires attached? It's important you unplug the dryer and test these components with at least one wire disconnected from each component such as the flame sensor or the thermostats because you can get residual feedback from another component saying there is continuity.

So I suggest possibly retesting these with at least one wire removed from each component.

Let me know if you have done that already.

Customer: replied 6 years ago.
Yesterday, I tested and retested the flame sensor, high-limit thermostat with both wire unplugged. I physical removed from the dryer the thermal fuse and thermistor, testing their continuity which again tested as stated initially.
Other ideals?
Expert:  Bryan replied 6 years ago.

Okay you did that right. There are two things that maybe an issue in this. One is the control board itself is not sending power to the igniter or two the motor centrifugal switch is not engaging sending power through to the igniter. These are difficult things to test however when the motor starts there is a centrifugal switch that kicks in and the sends power to the ignition system in the dryer. If this has failed then it's not connecting sending power to igniter, however this is not a real common issue with these. Most likely it is in the control board. There are relays on the board which send power to the parts of the dryer once you start it. There should be a wiring diagram in the dryer somewhere possibly up in the control panel or inside the dryer somewhere which tells you which wires go to where on the motor and the control board. Trace these and see if you can find if it's coming from the control board on the motor, that's the issue. These electronic machines can be challenging to diagnose. If you can't find the issue, you will need to call the technician.

The wiring diagram is under the top one on this diagram.

Whirlpool Duel gas dryer wiring diagram

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