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DG7400 Dryer - Instructions

All Instructions for the DG7400
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Dryer would heat initially then cool down
The top of the dryer was easily removed by prying the front up with a screwdriver then tipping it back and off of the mounting brackets. Then the front of the dryer was removed by unscrewing a single screw on each side that held the front to the side panels then pulling the front away from the dryer. Once the front was off, the coils were easily accessible on the bottom left side. A metal bracket held the coils on and was somewhat tough to get the two screws removed on it as they were stuck, but once they were removed the coils easily came out and I was able to replace them in minutes. The whole job took 15-20 minutes and I now have a dryer that heats through the entire drying cycle.
Parts Used:
M Series Ignition Coil Kit
  • Brett from Monticello, MN
  • Difficulty Level:
    Easy
  • Total Repair Time:
    15 - 30 mins
  • Tools:
    Screw drivers
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Belt worn and blower wheel loose.
I noticed a rattling noise coming from the dryer. I disassembled the dryer to troubleshoot. I assumed the rollers were bad, but I discovered that the blower wheel was loose on the motor shaft. The rollers were fine. I also discovered the belt was worn.

I ordered a new blower wheel and belt. Replacement was as described elsewhere.

I couldn't get to the screws on the front panel because my screwdriver was too long. So I put a pressure treated 2x4 under the front dryer legs to elevate it. I used pressure treated lumber because that's what was in the garage. Untreated wood would also work.

After removing the front panel screws, the bottom of the front panel needs to be tilted away from the dryer. At about 20-30 degrees of tilt, the front panel will suddenly drop away from the top.

Rotate the front panel to your left so that the wires don't get stretched. It isn't necessary to unplug the wires. But after touching the wires and getting shocked, now is a good time to unplug the dryer. In fact, it would have been better to unplug the dryer before you start any work on it.

Remove the front bulkhead and lint filter housing as a unit. 4 screws hold it to the dryer.

Remove the screws holding the faceplate of the wheel assembly, and remove the faceplate.

Next remove the spring clip from the blower wheel shaft. Then remove the circlip using a circlip plier. The wheel will now slip off the motor shaft.

Put the new wheel on the shaft, making sure to align the flat part of the shaft with the flat part on the wheel. Install the circlip and spring clip.

Replace the faceplate, Note that the perimeter of the face plate goes inside a groove. Install the screws.

Replacing the belt has been covered before, so I'll leave it at that. Just make sure that the belt goes on the proper side of the belt guard.

Install the front bulkhead-lint filter housing. Make sure the lint filter housing lines up with the blower wheel housing and goes inside the felt.

Install the front panel. Make sure the felt doesn't get pinched by the drum.

The first time I disassembled the dryer, it took about 1.5 hours. The second time was only about 45 minutes. The third and subsequent times were even quicker. Practice makes perfect.
Parts Used:
Tumbler and Motor Belt Blower Wheel with Clamp
  • David from Germantown, TN
  • Difficulty Level:
    A Bit Difficult
  • Total Repair Time:
    1- 2 hours
  • Tools:
    Nutdriver, Pliers, Screw drivers, Socket set
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Alarming rattling/rumbling noise
I told my wife, "it's working fine. Let's just wait until it breaks, and I'll fix it." She said the noise is intolerable and if I didn't fix it, she'd "call someone to come and look at it."

The forums all suggested that noise during operation is due to worn out components that are involved with turning the tumbler. So I ordered a bunch of parts from Partselect.com and set to work. I replaced the belt, the belt idler wheel, and both of the tumbler support wheels.

I reinstalled the tumbler, plugged the dryer in, and started it up. Damn, the same noise as before. Wait! The tumbler isn't turning. In my haste to see if the noise was gone, I'd forgotten to rethread the belt. Analysis: noise unchanged but tumbler not rotating. Conclusion: the hateful noise has nothing to do with any of the components involved in turning the tumbler.

Looking and listening more closely, I determined that the noise was coming from the blower, the plastic squirrel-cage like assembly attached to the other end of the motor shaft. It seems to be rattling on the shaft, causing the noise. I remove it, clean off a couple decades of matted-on lint, and reinstall it. No change.

I do not have a replacement blower, so I remove the blower from the shaft, clean up the shaft with alcohol, then put a piece of plastic electrical tape part way around the shaft, effectively increasing its OD by a few thousandths of an inch. I reinstall the blower, put everything back together again, and start it up. No noise -- nothing but a low purring hum! Good enough for me, for as long as it lasts. When my improvised patch fails, I'll order a new blower and install that.

It's good that I was so stupid as to forget to reinstall the belt before I started the dryer the first time. Since the noise was still there, I was forced to re-examine my assumption that the noise was being caused by a worn-out tumbler-turning component. If i HAD installed the belt the first time, I'm sure I would have continued with the incorrect assumption that the noise problem was related to the tumbler.

My time and money weren't wasted, I don't think. The various wheels and the belt were over 16 years old and due for replacement anyhow.
Parts Used:
Idler Pulley Wheel Drum Support Roller Kit
  • Wayne from Minneapolis, MN
  • Difficulty Level:
    A Bit Difficult
  • Total Repair Time:
    1- 2 hours
  • Tools:
    Nutdriver, Pliers, Screw drivers
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Switch sticking in on position
FIRST unplug dryer from electrical source, CAUTION, the top of this dryer does not open with clips, do not pry on top to open! On the front of the dryer look under the lower panel, and find two screws, one on the left side, and one on the right, remove these screws, and pull slightly down on panel to remove. Behind this panel find two screws holding the door panel, one on the left, and one on the right, remove the left, and support the door panel while removing the right side. Gently pull the bottom of door panel outward, and the clips on top of door panel will unhinge from top, carefully rotate left side of door panel to floor, and note the wire connections on switch, and orientation of switch, then unplug wires, and move door panel to a comfortable working positon. Door must be open to remove switch, then depress the two plastic retaining keepers on each side of switch, and push switch through toward door. Replace with new switch, reconnect the wires, and reassymble in reverse order. Remember, door assymbly must be inserted in dryer top at an angle, and then bottom rotated downward, and bottom panel nylon guildes inserted into door panel bottom.
Parts Used:
Door Switch Kit
  • Don from Jacksonville, FL
  • Difficulty Level:
    Really Easy
  • Total Repair Time:
    15 - 30 mins
  • Tools:
    Nutdriver
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Dryer would only heat cycle once
I removed the two screws holding the front panel to expose the lower works and verified the heating cycle failure. After a check of the vent system, checking the sensors for continuity and coils for resistance, I retired to the 'net for support. Accepting the general consensus that the most frequent, common and likely failure to be the coils, I rechecked them with the meter and found the two pronged coil to have significantly more resistance than the three prong coil. That was enough evidence to point to the coils. While I waited for the part to arrive, I replace the vent ducting. When the parts arrived I removed the two Phillips screws holding the coils, removed the old ones, installed the new ones, replaced the bracket, put the front cover back on and in less then ten minutes clothes where drying.
Parts Used:
M Series New Style Coil Kit
  • Robert from Seattle, WA
  • Difficulty Level:
    Really Easy
  • Total Repair Time:
    Less than 15 mins
  • Tools:
    Nutdriver, Screw drivers
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Gas dryer would only occasionally heat up.
I noticed that the igniter would glow white hot for about 5 to 10 seconds, but would only ignite every once in a while. I decided that it was probably the gas valve that was bad. I removed the wires to the igniter and valve, and removed the two screws that secured the valve to the frame. I accidentally bumped the igniter as I removed the valve from the dryer - it broke! The igniter is extremely delicate, be careful not to touch it. When the new valve and igniter came in, I swapped some of the mounting hardware and installed the valve and igniter. I reattached the wires. The dryer fired up immediately - it was an easy fix.
Parts Used:
Gas Valve with Coils Flat Style Igniter
  • Daniel from East China, MI
  • Difficulty Level:
    Easy
  • Total Repair Time:
    15 - 30 mins
  • Tools:
    Screw drivers, Wrench (Adjustable)
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Loud rumbling at startup, periodic rumbling during drying, rumbling after motor stopped
After removing more bolts and screws than I needed to, here's how to replace the blower wheel on the stacked washer/dryer Maytag SG1000.

Turn off the power.

Remove the two screws on the access panel, which is the canted panel just below the dryer door, and remove the panel.

Remove the two screws at the top of the dryer door. These screws are on top of the dryer facing downward, and unless you're Yao Ming, you won't see them without a stepstool. You can then lift up the door and swing it out from the bottom.

There are two wires attached to the door which you should disconnect. You can set the door aside without disconnecting any other wires.

Next, remove the lint filter and the housing assembly it fits into. First, disconnect the ground wire connected to the upper-left corner of the housing, then remove 4 hex-screws accessed from inside the dryer tumbler.

You should take this opportunity to thoroughly remove lint from inside the housing.

The blower housing is now accessible. Remove the screws on the periphery of the blower housing cover (a.k.a. faceplate), and remove the cover.

The blower wheel is held in place by an external retaining ring and by a blower clamp. The replacement blower wheel came with a new blower clamp, and that clamp can be manipulated with a regular pair of pliers. I went out and bought a pair of snap ring pliers to deal with the retaining ring.

After removing the retaining ring and then taking off the blower clamp, I removed the old wheel. The new wheel was a little tough to put on, but after reading the story of the people who used a hammer to break their wheel, I just pushed on it until it popped on. I used my pliers to install the new clamp, then re-installed the retaining ring and the blower housing cover.

Reinstall the lint duct housing, making sure housing duct centers into the blower seal (looks like a felt circle). Reconnect the ground wire.

While you're inside the tumbler, at the front end of the tumbler just below the door there is a black plastic sensor with two metal bars on it called an automatic dry sensor. Fabric softener can coat the metal bars and cause the sensor to not function. Lightly sand the metal bars to remove any buildup.

Reconnect the wires to the dryer door. Reinstall the door by tilting the bottom in first, guiding the clips on the bottom of the door into the slots they fit in, then push the top of the door into position. Reinstall the screws at the top.

Reinstall the access door.

Turn the power back on! Done!
Parts Used:
Blower Wheel with Clamp
  • Ed from Long Beach, CA
  • Difficulty Level:
    Easy
  • Total Repair Time:
    1- 2 hours
  • Tools:
    Nutdriver, Pliers, Screw drivers
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The dryer heated up for a few minutes and then cooled down.
1 Unplug power.
2. Remove the front of the unit by removing the two screws at the bottom of the front panel. Front dryer panel will swing out from the bottom and then the clips will release the top of the panel, careful not to disconnect the dryer door switch. ( can be unplugged to remove the front panel out of the way.)
3. Looking inside the unit on the right side you will see the gas value. On top of the gas unit you will see two small coils the coil closest to the burner has two leads on it. Remove the two screws to get to the coils, remove the medal plate, remove the connector then lift off the secondary coil. Replace and test. You can test unit with the front panel off. (be careful). If no heat, check that the Flat Style igniter is glowing. (ohm out both coils) before ordering parts. Intermittent heat problems. I replaced the secondary coil, it did ohm out o:k but it had swollen and was very tight on the shaft.
Parts Used:
M Series New Style Coil Kit
  • James from Limington, ME
  • Difficulty Level:
    A Bit Difficult
  • Total Repair Time:
    Less than 15 mins
  • Tools:
    Screw drivers
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The dryer would start to heat then the heat would stop
I changed out the cycling thermostat and the high limit thermostat. Mainly because that was what my research indicated was the problem. I then found some more information online that indicated the gas solenoid valves were bad. I ordered them from you and replaced them. The problem was fixed.

In order to replace the valves you need to remove the top panel. Two screws at the top of the front door assembly hold it on. Remove the screws, lift up on the front panel door assembly and move it to the side. The drum will rest in place. In the lower left corner, under the drum, you will see the solenoids. Two screws attach a plate that holds down the solenoids. Take the hold down plate off, disconnect the control wires attached to the solenoids and lift out the solenoid/control valves. To assemble everything, work backwards to the start. Good Luck
Parts Used:
M Series New Style Coil Kit M Series New Style Coil Kit
  • Theodore from Riverside, CA
  • Difficulty Level:
    A Bit Difficult
  • Total Repair Time:
    30 - 60 mins
  • Tools:
    Nutdriver, Screw drivers, Wrench set
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dryer would get hot for a while, then quit heating
After reading about other people with this same problem I took a chance that this would be what was wrong with my dryer.I took off the front cover of the dryer by removing two screws. I located the faulty coils and simply plugged in the 2 new coils Tah-dah Probably coud have been done without even removing the front panel, but since it was off I vacuumed out the lint ( actually my husband did all of the above, but I tell a better tale than he does and I diagnosed the problem and ordered theparts)
Parts Used:
M Series New Style Coil Kit M Series New Style Coil Kit
  • Sharon from Houston, TX
  • Difficulty Level:
    Easy
  • Total Repair Time:
    15 - 30 mins
  • Tools:
    Screw drivers
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Door latch broken
I used my screw driver to pry the old female end of the latch from the dryer unit. I forced the new female part of the latch into the hole and bang...45 seconds later the door closed securely --like new!
Parts Used:
Door Latch Kit
  • thomas from appleton, WI
  • Difficulty Level:
    Easy
  • Total Repair Time:
    Less than 15 mins
  • Tools:
    Screw drivers
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Hummed when start button was pushed.
Safety first, so unplug the dryer. Next remove the two phillips head screws @ lower left and right front corners and take the front panel off. You will have to disconnect the door switch sensor wires which are yellow and white, marking the sensor so you can replace correctly. Next remove the front tumbler assembly with 4 screws, two on each side. Be sure to remove the automatic dry sensor wires. Then remove the belt by either reaching un under the tumbler and releasing the tension or taking the back access panel off w/ 4 screws and releasing the tension. Then once the belt is loose you can remove the tumbler. Then remove 2 screws and take the thermostat cover off. I removed the multi-temp thermostat w/ 2 screws rather than unhooking the wires and I did the same with the thermal fuse. Next remove 1 screw out of the blower housing cover and the 2 screws from the motor support. Once loose you can pull the motor out a little and unhook the wiring. Once out you will need to remove the pulley, blower housing and fan, and replace on new motor and put the new motor on the motor housing. Replace in reverse order and you should be done.
Parts Used:
Drive Motor - 60Hz 115V
  • Bob from Thayer, KS
  • Difficulty Level:
    Really Easy
  • Total Repair Time:
    30 - 60 mins
  • Tools:
    Screw drivers, Wrench set
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Dryer wouldn't heat
This was the first time I ever attempted such a repair on an appliance, but it was fairly easy once I figured out how to take the front of the dryer off! I was almost certain that the igniter was the problem was it didn't glow like it did before. On this particular LP Gas dryer from Maytag there is a little service door on the front near the floor. It is almost impossible to get your arm in there plus still have room to shine light in! I took off the two screws at an angle down near the floor and the whole front came off. I used a mini socket wrench to disconnect the igniter. I didn't have to remove the screw as the part slips on over the screw, then you just tighten the screw, connect the cable and it worked perfectly! Thanks PartSelect! As for the lint filter...the original has been broken for probably close to 10 years. It was just a matter of slipping the new one in.
Parts Used:
Lint Filter Flat Style Igniter
  • Daniel from Millmont, PA
  • Difficulty Level:
    Easy
  • Total Repair Time:
    30 - 60 mins
  • Tools:
    Socket set
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Intermittent or no gas ignition, HSI ignightor working
Removed front of gas dryer and cleaned all lint out. Checked HSI, and cleaned flame sensor. Split (3 terminal) gas coil terminals were intermittent. Read about 700 ohms across outer two terminals, but center terminal to either outer terminal was open (Infiniti on meter) 2 terminal coil measured about 550 ohms. 3 terminal coil should read about 700 ohms across outer terminals, and about 1.5K ohms center to outer terminals. Unscrewed index cover plate and replaced coil, 2 terminal coil was okay. Reassembled and finished 12 loads of laundry no problems at all.
Parts Used:
M Series New Style Coil Kit
  • Steven from Sauk Village, IL
  • Difficulty Level:
    Easy
  • Total Repair Time:
    30 - 60 mins
  • Tools:
    Nutdriver, Screw drivers
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Gas Flame Would Drop Out
First it was a process of alimination to find out why it was dropping out. After the problem was found it was just a matter of replacing the holding coil on the gas valve. Thank you fred kenney sr
Parts Used:
Dryer Radiant Flame Sensor
  • FRED from BRIELLE, NJ
  • Difficulty Level:
    A Bit Difficult
  • Total Repair Time:
    15 - 30 mins
  • Tools:
    Nutdriver, Screw drivers
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All Instructions for the DG7400
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