Whirlpool GEW9250 Electric Dryer

TECH SHEET – DO NOT DISCARD

PAGE 1

WARNING

IMPORTANT Electrostatic Discharge (ESD) Sensitive Electronics

Electrical Shock Hazard Disconnect power before servicing. Replace all parts and panels before operating. Failure to do so can result in death or electrical shock.

ESD problems are present everywhere. ESD may damage or weaken the electronic control assembly. The new control assembly may appear to work well after repair is finished, but failure may occur at a later date due to ESD stress. ■ Use an anti-static wrist strap. Connect wrist strap to green ground connection point

or unpainted metal in the appliance -ORTouch your finger repeatedly to a green ground connection point or unpainted metal in the appliance. ■ Before removing the part from its package, touch the anti-static bag to a green

ground connection point or unpainted metal in the appliance. ■ Avoid touching electronic parts or terminal contacts; handle electronic control

DIAGNOSTIC GUIDE

assembly by edges only. ■ When repackaging failed electronic control assembly in anti-static bag, observe

Before servicing, check the following:

above instructions.

■ Make sure there is power at the wall outlet. ■ Has a household fuse blown or circuit breaker tripped? Time delay fuse? ■ Is dryer vent properly installed and clear of lint or obstructions? ■ All tests/checks should be made with a VOM (volt-ohm-milliammeter) or DVM (digital-voltmeter) having a sensitivity of 20,000 ohms per volt DC or greater.

If unsuccessful entry into diagnostic mode, actions can be taken for specific indications:

Indication 1: None of the indicators or display turns on. Action: Select any manual cycle. If indicators come on, then try to change the dryer time by pressing the More Time and Less Time buttons. If either button fails to change the time, something is faulty with one of those buttons, and it is not possible to enter the diagnostic mode. Remove the console electronics and housing. See Accessing & Removing the Electronic Assemblies, page 7.

■ Check all connections before replacing components. Look for broken or loose wires, failed terminals, or wires not pressed into connectors far enough. ■ A potential cause of a control not functioning is corrosion on connections. Observe connections and check for continuity with an ohmmeter. ■ Connectors: Look at top of connector. Check for broken or loose wires. Check for wires not pressed into connector far enough to engage metal barbs. ■ Resistance checks must be made with dryer unplugged or power disconnected.

DIAGNOSTIC TESTS These tests allow factory or service personnel to test and verify all inputs to the machine control electronics. One may want to do a quick and overall checkup of the dryer with these tests before going to specific troubleshooting tests.

If no indicators come on after selecting the manual cycle, go to TEST #1, page 3.

Indication 2: E1 or E2 flashes from the display. Action: Proceed to TEST #3a, page 4. Indication 3: E3 flashes from the display. Action: Check that the correct machine

numbers in the Service Parts List for this unit. See Accessing & Removing the Electronic Assemblies, page 7. Replace components if necessary.

Diagnostic: Console switches and indicators Pressing each button or turning the cycle selector to each cycle should cause a beep tone and control one or more LEDs as shown in figure 1, page 3. Pressing the Start button will also control the motor and heater, while the two-digit display will indicate a software project i.d. number.

Diagnostic: Moisture Sensor Locate two metal strips on the face of the lint screen housing. Bridge these strips with a wet cloth or a finger. If a beep is heard and a software revision number is displayed on the console, the sensor is OK. If not, or if a beep tone is heard before bridging the moisture strips, go to TEST #4, step 2, page 5.

Diagnostic: Door Switch

control electronics and console electronics and housing are installed. Do so by removing these components to view the part numbers and compare them to the part

Opening the door should cause a be