How To Replace A Dryer Vent Hose

Posted on: 14 April 2016

If your dryer is taking longer than normal to dry clothes, replace the vent hose. The dryer vent hose serves as protection against fire by directing hot air outside your home, and it often malfunctions because of lint buildup or from getting crushed. You should be able to replace the dryer vent hose yourself. Here are some tips to replace the dryer vent hose. 

Prepare to Work

For this project, you need:

  • leather work gloves
  • safety glasses
  • voltage meter
  • screwdriver
  • pliers
  • utility knife
  • tin snips
  • metal dryer clamps
  • tube of caulk
  • spray foam insulation
  • jab saw
  • replacement dryer vent

Unplug the dryer's power cord, and for additional safety, turn off the breaker to the room from the breaker box. Run a voltage meter over the breaker box to ensure no current exists. The voltage tester beeps when it detects a current.

If the dryer is gas, turn off the gas supply valve, which is usually located on the dryer line. Rotate the valve right, using a wrench if needed.

Remove the Old Dryer Vent Hose

Move the dryer away from the wall far enough so you can access the vent flange. Dryer vent hoses are commonly secured by screws or duct tape. Remove the screws on the clamp with the screwdriver, or cut through duct tape with a utility knife.

Detach the screws that hold the plastic beauty ring (vent collar) on the wall, and set the ring and screws aside. If there's spray foam insulation, the vent may be harder to remove. Use the utility knife to remove caulking, and detach the screws on the clamps that connect the vent to the wall. Then set the screws aside.

Remove the vent hose from the wall. To remove the spray foam insulation, cut through it with a jab saw. If the saw won't cut through the insulation, cut the vent hose with tin snips. Pull on one side of the cut vent with pliers until it is out of the wall.

Install the New Dryer Vent Hose

If the dryer vent hose is intact, use it to help you buy a replacement -- or write down your dryer model number. Place the dryer vent hose in the hole, and then reattach the hood and clamps. Create an airtight seal by wrapping foil duct tape on the end of the hose where it attaches to the flange.

If it is flexible, flex the hose so it reaches the exterior vent, and trim access length with utility shears. Cut the tip of the caulking tube with utility shears, and spread layer of caulk around the vent hood to keep moisture out.

Allow the caulk to cure according to instructions, and then fill gaps with foam insulation. Spray foam can double in size, so avoid spraying too much. Reattach the beauty ring.

Move the dryer back in place, and test for proper operation. If it still isn't working, get help from an appliance repair service. For more information, speak to your appliance repair expert.