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I have an old GE DDE7500 electric dryer and I'm trying to replace the foil duct with a semi-rigid duct, but it seems too big for the dryer. I can't seem to lock it down, even with the screw-based fasteners the duct came with; just mangle it and rip holes. Is the original 3.5 in? Should I just go back to the foil and squeeze clamps that worked fine before?

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The dryer duct itself from the inside of the dryer connected to the blower housing has probably collapsed,they are no longer available,but you could make your own new one from elbows and straight pipe to replace the old one

Posted on Mar 22, 2011

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Posted on Jan 02, 2017

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Keep getting warning "check exhaust" on a new gas dryer. All exhaust is clear. What's going on?


The CHECK VENT duct blockage sensing system detects and alerts you to blockages in the duct work that reduce exhaust flow from the dryer. This light does not indicate any problems with your dryer. If this light blinks, it indicates that your home's exhaust system/duct work has a serious restriction

Every time the dryer is turned on, the CHECK FILTER LIGHT WILL BLINK, as a reminder to make sure the filter is clean. Always make sure the lint filter is clean before starting a new load; a clogged lint filter will increase drying times.

The Kenmore Elite dryer has a sensor that detects poor exhaust venting, and when it does, a light flashes on the control panel. This warning light does not include a mechanism to stop gas flow, but if it is allowed to flash for an extended period, poor venting may cause the dryer to overheat. As a result, a fuse might blow and disable the gas valve or ignitor. You can prevent this by diagnosing the reason for the flashing indicator light as soon as possible.

In many cases, LINT has built up somewhere in the exhaust pipes.

Check under the lint filter. Pull it out,look inside the slot it fits in, and clear all lint from this area.

Is it possible you have used the WRONG VENT MATERIAL?
Check your vent to make sure it is 4 inch rigid or semi-rigid metal ducting. If your venting is plastic or flexible foil, replace it before using the dryer.

Check your vent hood outside. You may have a restricted or damaged vent hood. It must be clean and free of lint buildup. Check the damper and make sure it opens fully and easily and is free of lint.

I know you said you have no elbows, but I have posted the pipe run lengths with and without elbows. Keep in mind this is with 4 inch rigid or semi rigid metal ducting.

Measure the length of your exhaust system and count the elbows. Use the chart below to see if your duct is too long. If it is too long, have the duct routed to another location that is within the venting guidelines.

0~90 degree elbows=65 ft of 4 inch rigid metal duct.
1~90 degree elbow=55 ft of 4 inch rigid metal duct.
2~90 degree elbows=47 ft """"""""
3~90 degree elbows=36 ft """"""""
4~90 degree elbows=28 ft """"""""

You should always use duct tape or metal tape on all joints, NEVER USE SCREWS, as screws capture lint inside the pipe.

One more note. Lots of people overlook the fact that fabric softeners can build up on the lint filter over time. This buildup can restrict the airflow through the filter reducing dryer efficiency and lengthening drying times. After removing lint, if the filter looks dark or dirty when held up to the light, follow these steps to clean:

Use hot soapy water and a stiff brush to clean
the filter.
Make sure the filter is completely dry before
reinstalling it and using the dryer.
NEVER operate the dryer with a wet lint filter.

Oct 29, 2014 | Kenmore Dryers

Tip

Dryer Ducting Installation Advice


Here's some useful guidance for installing dryer ducting. Improperly installed ducting can cause the following:

GAS DRYERS - Rapid burn cycling and improper drying results.
ELECTRIC DRYERS - Premature Heating Element failures.

IMPORTANT! NEVER terminate ducting in a chimney, under an enclosed crawl space or attic, and never common a dryer duct with a kitchen exhaust.

The total length of ducting and number of turns should be kept to a minimum. Semi-rigid metal type ducting is strongly recommended as it is more durable and resists collapsing.

If connecting sections of ducting, all joints should be tight to avoid leaks. The male end of each section must point AWAY from the dryer to prevent lint from accumulating at each junction. Ductwork should NOT be assembled with screws or fasteners that extend INTO the duct as this also will create points where lint will become snagged and accumulate. Wrap overlapping sections of ducting with duct tape.

A screen should NEVER be installed over the exhaust duct termination. The preferred termination is a dampered wall cap having a 4 inch opening. It must be installed a minimum of 12 inches above the ground.

Maximum Length of Metal Duct:

# of 90 degree elbows:

4" Semi-Rigid 4" Flexible
0 - 58 ft 28 ft
1 - 48 ft 23 ft
2 - 38 ft 19 ft
3 - 29 ft 17 ft
4 - 21 ft 15 ft

NOTE: It is recommended that you inspect your dryer ducting periodically to ensure you have no lint build up. Excessive lint can present a fire hazard.

on Dec 04, 2009 | Dryers

Tip

Dryer Ducting Installation Tips


Here’s some useful guidance for installing dryer ducting. Improperly installed ducting can cause the following:

GAS DRYERS – Rapid burn cycling and improper drying results.
ELECTRIC DRYERS – Premature Heating Element failures.

IMPORTANT! NEVER terminate ducting in a chimney, under an enclosed crawl space or attic, and never common a dryer duct with a kitchen exhaust.

The total length of ducting and number of turns should be kept to a minimum. Semi-rigid metal type ducting is strongly recommended as it is more durable and resists collapsing.

If connecting sections of ducting, all joints should be tight to avoid leaks. The male end of each section must point AWAY from the dryer to prevent lint from accumulating at each junction. Ductwork should NOT be assembled with screws or fasteners that extend INTO the duct as this also will create points where lint will become snagged and accumulate. Wrap overlapping sections of ducting with duct tape.

A screen should NEVER be installed over the exhaust duct termination. The preferred termination is a dampered wall cap having a 4 inch opening. It must be installed a minimum of 12 inches above the ground.

Maximum Length of Metal Duct:

# of 90 degree elbows 4” Semi-Rigid 4” Flexible
0 58 ft 28 ft
1 48 ft 23 ft
2 38 ft 19 ft
3 29 ft 17 ft
4 21 ft 15 ft

NOTE: It is recommended that you inspect your dryer ducting periodically to ensure you have no lint build up. Excessive lint can present a fire hazard.

on Feb 10, 2008 | Whirlpool GEW9250 Electric Dryer

2 Answers

Electrolux dryer won't heat


a gas dryer has a ignighter that may have burned out. a $40 part

May 12, 2014 | Electrolux Dryers

1 Answer

How to connect the exhaust hose to the exhaust pipe


Aluminium tape, not plastic duct tape.
Corrugated rigid aluminium ducting, don't use the foil stuff, its not suitable.
Clean duct and machine about every 500 cycles, ie if 2 a day then every 250 days. (adjust to actual linting)

Oct 18, 2013 | Miele Touchtronic T1303 Electric Dryer

2 Answers

My dryer wont start and says t5 on the display


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There can be many reasons why your dryer will not start or turn...

The most common causes are the belt breaking or jumping off, or the motor going bad...

Here are a couple of tips that I wrote will help you to figure out why your dryer will not run...

Dryer Repair - The Dryer is not Turning

Dryer Repair - The dryer will not start


heatman101

Aug 23, 2010 | Amana Dryers

1 Answer

I have a GE Hotpoint NVL333EYOWW electric dryer that gets very hot on top. Is that normal?


There was a long run of rigid ducting out to the vent. I stuck a leaf blower down the dryer-end of the duct and turned it on full blast. It blew a big chunk of lint out the vent and the dryer problem was resolved...

Sep 15, 2009 | GE Dryers

1 Answer

How hot is the Vent temp of my new Duet?


It's not the temperature of the air that is the problem. The air is seldom over 160 Deg F. If you have a vent fire the piping needs to last long enough without melting to starve the fire of oxygen in the hopes of extinguishing. Rigid aluminum piping is best suited for this, Rigid flexible is next. The tin foil and white plastic offer little resistance to melting if a fire should begin. The melting would allow the fire to replenish oxygen and support the burning process. The main caution here is to keep your dryer and vent clean...at least annually.

If the duct inside your wall is rigid metal all the way from the dryer to the house exit you need to do nothing to it . Replace the vent between the dryer and the wall with rigid metal 4" piping or hard flexible aluminum piping. If the duct inside your wall is either of the least effective types you need a new run of vent for the dryer to avoid a fire.

You can't use white plastic or flimsy flexible aluminum that feels like aluminum foil when you touch it.

Sep 10, 2009 | Whirlpool Dryers

1 Answer

How can I connect my dryer to the vent without crimping the hose? Whenever I connect the hose and push the dryer to the wall, the hose gets holes in it...


The dryer should not be pushed all the way against the wall. For the ventilation to properly work, you should leave about a one foot space between the back of the dryer and the wall. Using 90 degree elbows on the dryer and wall can also eliminate crimping. Also, it is strongly recommended that use use the semi-rigid metal type vent hose ducting. It is not that expensive and comes in adjustable lengths. The semi-rigid ducting is recommended by most builders and it resists crimping and rodent damage. If you continue to use a dryer with the exhaust vent clogged it will lead to eventual heating circuit failure due to overheating. If you have any questions, please post back and let me know. I hope this helps answer some of your questions.

NOTE: If you purchase semi-rigid ducting, make sure you purchased the hose clamps that go with it. This will prevent the hose from slipping off the connection points.

Jun 15, 2008 | Dryers

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