MDG7400AWW Maytag Dryer - Instructions

Unscrewed the two fasteners, rerouted one wire using a wire coat hanger, plugged in the new moisture sensor to the two wires and fastened the the sensor in place using the two existing screws.

The ignitor is easy to determine if it is defective. When you start the dryer and the ignitor does not glow , it is bad.
The replacement involves unpluging the dryer, opening the control access door ,the removal of one screw, unplug the bad ignitor, plug in the new ignitor, reinstall the one retaining screw, plug the dryer back in, check for proper opperation of the ignitor, and close the close the control access door.
Very easy

Piece of cake. Used flat screwdriver to pry out female part on cabinet side, same with the male part on door. Every new replacement part was tight and operated like new. Thanks Part Select, you'll be forever on my list of online parts buying.

When the timer was pulled out to start the dryer it would not consistently start up. I generally had to wiggle it around to get the dryer started.

I replaced the timer. To do this you need to pull off the front cover of the timer knob with a small screw driver I then used a needle nose plier to sqeeze together two pieces of plastic that hold the knob in place. The knob is then removed.
Next, there are three screws at the top of the dryer that need to be removed to take off the front cover to the instrument panel.
Removing the old timer is easy. Take off the wiring harness. In removing the harness, there is a small tab that needs to be pushed down.
To remove the old timer, there is a small tab on the instrument panel that holds the timer in place that needs to be pushed down. From there it is easy to slide out the old timer and replace it.

Getting to any of the parts in the Maytag dryer is easy. Tip the dryer back and slide a 4 x 4 block under the front edge. You remove the whole front panel after you remove two screws at the bottom corners of the front panel. You need to tip the dryer back to get a screwdriver on the screws. Swing the front panel up to release the top of the door panel from the top. Watch the short wires to the door switch. Unhook the door switch wires and move the front panel out of the way. The timer on the top is accessed by re-moving two screws along the top edge. There are four screws. Remove them all and tip the top of the front panel forward. You then see that two screws hold the panel and the other two screws just hold the trim.

The dryer started normal. The drum motor run when the start button was operated. The fluff cycle operated normal to indicate the timer motor was OK. On the dry cycles, the igniter heated up. The gas came on. The dryer run for some period of time and then the flame went off. The thought was that the low temp cycle thermostat sensed the dryer was hot and thus switched over to time the cycle to its end. However, the low temp cycle thermostat tested good with a meter when the sensor was removed from the dryer and heated with a light bulb. Burnt contacts in the sensor were a possible problem. I also though the radiant sensor may be bad and not recycling after it got hot. After time, the igniter would cycle on but the gas flame would not come on. I thought the radiant heater might not be tripping the secondary coil on the gas valve. The gas valve coils tested good. I was checking them cold after the dryer had cooled down. I ordered a number of parts.

I got lucky and did a test on the coils while the dryer was still hot. One of the coils in the dual booster holding coil was going open when hot. When cold it had enough continuity to let the gas valve cycle on once. After the coil got warm it went open and shut the gas valve off. When the coil did cool off, it again had continuity. I was about ready to trash the dryer when I finely found the problem. I am happy I persisted and worked the problem through to a solution. I purchased several extra sensors but saved money in the long-run. I rate this problem at the high end of complexity for the do-it your self home owner to solve. The problem was an easy fix once the real problem was found. Only 4 screws and 3 push on wire connectors (two were on the front panel for the door switch).

Checked four thermocouples all showed continuity with my multimeter so they were all good. I'd read that the coils commonly went out and that these were the symptoms. Hey, it's very simple in there. Not much else could be wrong. I had a Maytag repairman come out. At first he said the problem was a blocked vent. I knew he was wrong. Then he said one of the thermocouples went out. It was $80 for him to come out. It turned out that his second diagnosis was wrong too. To repair the dryer by Maytag would have cost me $240. I gave him $80 and bought the coils for $37. They are EXTREMELY easy to replace: two screws held a bracket that held two coils. With the bracket off, I took off the old coils and slid on the new ones.

I took out screws holding top to dryer & raised the top & proped it up to gain access to inside of the dryeeer drum. I then inatalled the new baffle & secured it with 2 screws. It would have been better if the part came with new screws.It was hard to determine which was the right screws for this application.

Removed one screw and took out old broken door strike, replaced with new door strke and put screw back in. Only took two three days to get the part. The dryer is as good as new!

First I removed the front panel on the dryer. While the dyer was running, I noticed the igniter did not turn its normal amber color and ignite the gas supply. I then disconnected the wire to the igniter and removed the screw holding the igniter in place. Next I replaced the igniter, tightened the screw and reconnected the wire. Finally, I replaced the front panel. This is a relatively simple repair.

Remove the timer control knob cap with a small flat head screw driver on either side of the cap, between the cap and the rubber ring (this took a while to figure out, but it's easy once you do) then remove the knob. Remove 3 T15 hex screws on top of control panel, tilt top of panel toward you and lift up. Remove the electrical connector (this was difficult, you have to release the lock and rock the connector at the same time). Push down on the locking tabs at the feet of the timer assembly and slide to remove. Reverse these directions to install new timer. Unfortunately this did not fix my problem because the timer still won't advance. I'm replacing the sensor assembly next. I'll let you know if that works.

Yanked the front panel, observed motor operation while my smoking hot wife started the unit. Our washer and dryer get beaten like rented mules with kid laundry. I tried this site, and decided to spend a little $$ on a replacement motor. I was impressed with the operator, she even asked what the symptoms were and helped to avoid wasting time and money.
The part arrived on time, and installed quickly. I am a hero in my wife's eyes, and that certainly carries weight.
Then again, I didn't have to dispose of the old dryer, pay for a new one, or haul the replacement upstairs.
Win-win!

Removed the dryer front, then detached the retainer ring holding the blower wheel in place. Set the new blower wheel, attached the new ring retainer and placed the dryer front back in place. Thank you for the low prices - I searched on-line at 3 sites and you were the best price available.

I replaced the sensor assembly (chime & dryness) in the dryer control panel. It just snapped out and the new one snapped in. That fixed the problem!

This was fairly easy, I have had the dryer front off before. Unplug dryer from electrical outlet. Pull dryer away from wall. Remove the dryer door, open dryer door there are 2 phillips screws on dryer door hing, remove these crews then lift gently and remove door, across from these screws, where dryer door closes into face cover of dryer remove 2 more phillips screws. From top of face cover, pull out front of face cover and lift to remove face cover of dryer. On each side of dryer on the front, after removing the front cover is a 5/16 bolt, remove these and pull off retaining bracket with a twisting motion. You now can lift the top of the dryer up. You can now see the barrel drum. Rotate barrel by hand so the broken baffle is on top. Remove two 5/16 bolts, and replace new baffle in place. Reassemble in reverse order of disassemble.

The old sensor came out by removing 2 screws. I unplugged the two wires from the back of the sensor and plugged them into the new sensor. I reinstalled the new sensor using the same two screws. Of course, I unplugged the dryer first.