Dryer Vent Cleaning
Dryer vent cleaning in Denver: lint removal, airflow tests and duct repair for wall, roof and condo vents. Same-day service, 90-day warranty on repairs.
Dryer vent cleaning in Denver: lint removal, airflow testing and vent repair for wall, roof and long condo vent runs. The Appliance Team cleans and inspects dryer vents across the Denver metro and 30 surrounding cities, and we repair the dryer itself when the vent is not the whole story. A clogged vent makes clothes take two cycles, overheats the dryer and is a real fire risk. You get a written quote before any work starts, the $99 service call is waived when you proceed, and every repair carries a 90-day warranty on parts and labor. Same-day service is available on most weekdays.
Why dryer vent cleaning matters
Lint is the fuel in most dryer fires. The U.S. Fire Administration’s report on residential dryer fires (2008–2010 data) counted about 2,900 dryer fires a year in homes, with about 5 deaths, 100 injuries and $35 million in property loss. “Failure to clean” was the leading factor at 34%, and dust, fiber and lint were the most common items first ignited. NFPA’s broader count for 2010–2014 put home fires involving dryers and washers at about 15,970 a year, with dryers involved in 92% of them, and again found failure to clean was the leading cause.
The U.S. Consumer Product Safety Commission says lint can block the flow of air, cause heat to build up and start a fire.
What we clean and inspect
| Vent setup | Common in | What we do |
|---|---|---|
| Short wall vent (straight out the back) | Single-family homes with an exterior laundry wall | Clean the duct and wall hood, check the damper flap, replace crushed transition duct |
| Long wall vent through joists or a basement | Ranch and split-level homes, finished basements | Rotary brush and vacuum the full run, check joints and elbows, measure airflow |
| Roof termination | Second-floor and interior laundry rooms | Clean from the dryer end and check the roof cap for lint packing; we tell you if roof access is needed |
| Condo and townhome vents | Multi-story buildings, stacked laundry closets | Clean the unit’s run, check the termination, flag shared or building-side issues for the HOA |
| Vents with a booster fan | Runs longer than the dryer is rated for | Clean the duct and fan, check the fan’s pressure switch and operation |
| Transition duct behind the dryer | Every vented dryer | Replace foil or vinyl with listed metal duct, fix kinks from the dryer being pushed back |
We service all major dryer brands, including Whirlpool, Maytag, LG, Samsung, GE, Electrolux, Bosch, Miele and Speed Queen, gas and electric. If the dryer has a failed thermal fuse, heating element, igniter or thermistor from running hot, our dryer repair techs fix that on the same visit.
Signs your dryer vent is restricted
| Symptom | Usual cause | Fix |
|---|---|---|
| Clothes need two cycles | Lint buildup in the duct or wall hood | Full vent cleaning and airflow test |
| Clothes still damp at the end of a timed cycle | Restricted exhaust, moisture cannot leave the drum | Clean the vent; check the transition duct for kinks |
| Dryer cabinet is very hot to the touch | Hot air trapped by a blocked vent | Clean the vent; test the high-limit thermostat and thermal fuse |
| Dryer stops heating | Thermal fuse blown after overheating | Clean the vent first, then replace the fuse; replacing the fuse alone will not last |
| Steam on the door glass or display | Humid air not exhausting | Clean the vent and check the termination |
| Water behind or under the dryer | Condensation in a restricted or sagging duct | Clean, re-support and reseal the duct |
| Very little lint on the lint screen | Lint going elsewhere: around the screen, into the cabinet or the duct | Clean the vent and the dryer chassis; check the screen housing |
| Wall flap does not open while the dryer runs | Lint packed in the hood, stuck damper, bird or rodent nest | Clear and repair or replace the hood; no screens allowed |
| Burning or hot smell | Lint near the heater or a packed duct | Stop using the dryer; clean the vent and the inside of the cabinet |
| Check Vent light, d80/d90 or Clg code | The dryer’s own airflow sensor detected restriction | Clean the vent and the duct; re-test with the dryer’s sensor |
Rigid vs. foil duct
The International Residential Code, section M1502.4.1, requires the concealed exhaust duct to be smooth-interior metal at least 0.0157 inch thick (about 28 gauge) and 4 inches in diameter. The only flexible piece allowed is the transition duct behind the dryer: one length, no longer than 8 feet, listed to UL 2158A and never hidden inside a wall or ceiling (M1502.4.3). Joints may not use screws that stick more than 1/8 inch into the duct, because screws catch lint. Whirlpool’s installation instructions say to use rigid or flexible metal duct and not plastic or foil. CPSC says flexible plastic or foil duct traps lint more easily and is prone to kinks and crushing.
How long can a dryer vent be?
The IRC limit is 35 feet from the dryer connection to the outlet, reduced for every fitting (M1502.4.5.1). A 4-inch mitered 90° elbow counts as 5 feet and a mitered 45° counts as 2.5 feet. But the code also says the dryer manufacturer’s length rules govern when they are provided (M1502.4.5.2), and those are often longer. If the equivalent length goes over 35 feet, the code calls for a permanent label within 6 feet of the dryer connection stating the length.
| Dryer (4-inch rigid metal) | 0 elbows | 1 | 2 | 3 | 4 |
|---|---|---|---|---|---|
| Whirlpool electric, box or louvered hood (RED4640Y instructions) | 64 ft | 54 ft | 44 ft | 35 ft | 27 ft |
| Whirlpool electric, angled hood | 58 ft | 48 ft | 38 ft | 29 ft | 21 ft |
| LG (4-inch wall cap) | 65 ft | 55 ft | 47 ft | 36 ft | 28 ft |
| GE 6.0–8.3 cu. ft. dryers (4-inch opening) | 90 ft | 60 ft | 45 ft | 35 ft | 25 ft |
| Samsung “Long Vent” models (e.g. DVE45T6020W) | Up to 120 ft | Reduced per elbow; see the spec sheet | |||
Limits vary by model, so the installation manual for your dryer is the final word. Whirlpool says to add one 90° turn for side or bottom exhaust. GE counts two 45° elbows as one 90°. LG says not to use more than four 90° elbows.
Roof and wall terminations, booster fans and condos
The vent must end outdoors, at least 3 feet from doors and windows unless the dryer maker says otherwise, with a backdraft damper and at least 12.5 square inches of open area. The code bans screens at the termination (M1502.3) because they catch lint. Whirlpool and GE both call for the hood at least 12 inches above the ground. GE says not to end the vent in a chimney, crawl space, attic, or a common duct with kitchen exhaust.
When a run is too long for the dryer, a booster fan (the code calls it a dryer exhaust duct power ventilator) must be listed to UL 705 and installed to its maker’s instructions (M1502.4.4). Booster fans need cleaning too, and a failed fan on a long run blocks the vent just like lint does. In condos and townhomes the run is often long, may go up through the roof, and part of it may belong to the HOA. IRC M1502.2 requires each dryer exhaust to be independent of other systems. We clean the unit’s run, report what we find at the termination, and give you a written summary you can send to the HOA or property manager.
Dryer vent warnings and codes by brand
Many newer dryers measure their own airflow and tell you when the vent is restricted. Code meanings vary by model and market, so check your manual if a code is not listed here. Write the code down before you call.
Whirlpool and Maytag-family dryers
| Code / light | Meaning | What usually fixes it |
|---|---|---|
| AF or Check Vent | Restricted airflow: clogged lint screen or vent, or a duct that is crushed, kinked or has too many turns. Shows during the sensing phase of automatic cycles; the dryer keeps running. | Clean the lint screen and the full vent run, fix kinks |
| Check Lint | Reminder to clean the lint screen | Clean the screen every load |
| F3 E1 | Whirlpool lists this fault under the exhaust thermistor | Breaker reset, then thermistor or control diagnosis |
| F# E# (other) | The control has detected a fault | Service call |
| L2 | Low or no line voltage; the heater will not come on | Check breakers and the power cord; electrician if needed |
| PF | Power failure interrupted the cycle | Restart the cycle |
Whirlpool’s own airflow test: run the dryer 5–10 minutes, then hold your hand under the outside hood. If the airflow is weaker than a hair dryer on high, the entire vent system and hood need cleaning.
LG dryers (Flow Sense)
| Code / display | Meaning | What usually fixes it |
|---|---|---|
| d75 / d80 / d90 / d95 | The exhaust duct is clogged, at about the percentage shown. On gas dryers, d80 may instead mean no gas supply. | Clean the duct, fix crushed or kinked sections; check the gas valve on gas models |
| Flow Sense, two or four bars | The exhaust system is severely restricted | Full vent cleaning |
| tE2 | Thermistor reading in cold conditions, often when the duct cools too fast | Check the vent for snow, ice or lint |
| tE1 / tE3 | Thermistor problem | Factory reset, then thermistor replacement |
| HS | Humidity sensor error; the dryer runs about 2.5 hours | Clean the sensor bars below the lint filter |
| nP | No current detected at the heater, usually home wiring | Breaker reset, electrician check of the outlet |
| PS | Improper voltage, possibly reversed wires at the terminal block | Correct the cord installation |
| F0 / INSERT FILTER | Lint filter not inserted properly | Reseat the filter |
Samsung dryers
| Code | Meaning | What usually fixes it |
|---|---|---|
| HC / hE / HC4 | The dryer is overheating, commonly from a clogged lint screen or vent | Clean the vent; check the heater circuit |
| tS / tC / tO / tE family | Temperature or temperature-sensor problem, often from a clogged screen or vent | Clean the vent; test the thermistor |
| Clg / Cg | Vent blockage test: the vent is clogged | Full vent cleaning |
| C80 / C8 | About 80% of the vent is clogged | Full vent cleaning |
| C90 / C9 | Over 90% of the vent is clogged | Full vent cleaning, check the termination |
| Ct | Test could not run: dryer below freezing or above 104°F | Let the dryer reach room temperature and re-test |
| Vent sensor light on or blinking | On at about 60% blockage; blinks for 3 hours after a cycle above 80% (Samsung Canada) | Clean the vent before other troubleshooting |
| 9C1 / 9E | Abnormal supply voltage | Dedicated circuit, no extension cord |
Some Samsung models run a built-in Vent Blockage test. On DVE/DVG50B and 45B models: with the drum empty and cool, press Power, hold Adjust Time and Dryness for 3 seconds until “InS” appears, then press Start. The test takes about 2 minutes, and “0” means the duct is normal. Other models use a different button pair.
How a dryer vent cleaning visit works
- Inspection. We pull the dryer out, check the transition duct, note the duct material, length and number of elbows, and look at the outside termination.
- Written quote. You get a written quote for the cleaning and any duct or termination repairs before we start. The $99 service call is waived if you proceed.
- Cleaning. We clean the full run with rotary brushes and vacuum, clear the wall or roof hood, and clean lint from behind and under the dryer.
- Test. We check airflow at the termination and, where the dryer has one, run its built-in vent test or confirm the warning has cleared.
- Repairs. If the dryer ran hot long enough to blow a thermal fuse or damage a sensor, we quote that repair too. Every repair has a 90-day warranty on parts and labor.
Before you call: safe checks
- Clean the lint screen before or after every load. CPSC and every major brand recommend it.
- Go outside while the dryer runs. You should feel strong, warm airflow and see the flap open. Whirlpool compares good airflow to a hair dryer on high.
- Look for a kinked or crushed transition duct behind the dryer, especially after the dryer was pushed back against the wall.
- Check the wall hood for a nest, a screen or packed lint. Do not climb onto the roof to check a roof cap.
- If your dryer has a vent test (Samsung) or flow display (LG), run it and write down the result.
- If you smell burning, stop using the dryer and call. On a gas dryer, do not disconnect the gas line yourself.
Denver notes for dryer vents
Dryer fires are more common in fall and winter, with January the peak month in the USFA data, which lines up with Denver’s heavy indoor laundry months. Cold weather can also affect the vent itself. LG’s tE2 code is tied to the duct cooling too quickly, and LG says to check the vent for snow, ice or lint. Samsung’s vent test will not run if the dryer is below freezing, which can happen in an unheated garage laundry. After a snowstorm, make sure a low wall hood is not buried: Whirlpool and GE want it at least 12 inches above the ground.
For new laundry rooms and remodels, Denver’s residential code is based on the 2021 IRC with local amendments, so section M1502 is the starting point and the Denver permit office has the final word.
Dryer vent maintenance schedule
| Task | How often | Why |
|---|---|---|
| Clean the lint screen | Every load | Lint on the screen cuts airflow and raises drum temperature |
| Clean the full vent and exhaust duct | At least every 2 years (Whirlpool); once or twice a year (Samsung); more often with long runs, roof vents or heavy use | Removes the lint that fuels most dryer fires |
| Check the outside hood and flap | Every few months and after snow | Confirms the damper opens and nothing is nesting in it |
| Clean behind and under the dryer | Every vent cleaning | CPSC notes lint builds up there |
| Clean lint inside the dryer cabinet | Periodically, by a qualified technician | CPSC recommends it; lint near the heater is a fire risk |
| Clean and test a booster fan | With every vent cleaning | A failed booster fan blocks a long run |
Clean the vent, repair the dryer or replace?
Cleaning the vent comes first. Many dryers diagnosed as “not heating” or “taking forever” just need a clear vent, and replacing a thermal fuse without fixing the vent means the new fuse will blow again. If the vent is too long for the dryer, or it is foil or vinyl inside a wall, a duct repair or a re-route is the real fix, and we will tell you.
If the dryer has been run hot for a long time, it may have a damaged heating element, igniter, thermostat or drum seal. Those are usually worth repairing on a dryer in good shape. When a dryer is older and needs several major parts, replacing it may make more sense, and we will say so honestly.
Dryer vent cleaning near you
We clean dryer vents in Denver, Aurora, Lakewood, Highlands Ranch, Centennial, Littleton, Arvada, Westminster, Parker and Castle Rock, plus the rest of the metro. Landlords and property managers can have quotes sent to both the owner or manager and the tenant.
Related services: dryer repair, washer repair and range hood repair. Brand pages: Whirlpool, GE and Miele.
Common Dryer Vent Cleaning Issues We Fix
Why Choose The Appliance Team?
Denver's trusted appliance repair company — professional service you can count on.
Same-Day Service
Same-day appliance repair in Denver — call early and we can often be there today. No waiting around for weeks.
90-Day Warranty
90-day warranty on parts and labor for every repair we perform.
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Our Denver appliance repair technicians are trained on all major brands and use genuine manufacturer parts.
Transparent Pricing
Service fee waived with repair. No hidden charges, no surprises.
Frequently Asked Questions
The price depends on the length of the run, the number of elbows and whether the vent ends on a wall or the roof, so we give a written quote after inspecting it. The Appliance Team's home service call is $99, waived when you proceed with the work. Any repair to the duct or dryer carries a 90-day warranty on parts and labor.
Whirlpool says to remove lint from the entire vent system at least every 2 years, and Samsung recommends cleaning the vent once or twice a year. Long runs, roof terminations, condo vents and heavy use need cleaning more often. Clean the lint screen every load.
LG says d75, d80, d90 and d95 mean the dryer's exhaust duct is clogged, at about the percentage shown. On LG gas dryers, d80 can instead mean the dryer is not getting gas. The fix is to clean the duct and correct any crushed or kinked sections.
The International Residential Code allows 35 feet of 4-inch metal duct, minus 5 feet for each mitered 90° elbow, unless the dryer manufacturer allows more. Whirlpool's instructions allow 64 feet with no elbows and a box hood, LG allows 65 feet, and Samsung Long Vent models allow up to 120 feet. Runs over 35 feet equivalent need a permanent length label near the dryer.
Not for the concealed run. IRC M1502.4.1 requires smooth-interior metal duct at least 0.0157 inch thick, and only a single listed transition duct up to 8 feet may be flexible, never hidden in a wall. CPSC recommends replacing plastic or foil accordion duct because it traps lint and crushes easily.
Book a dryer vent cleaning
Call 720-230-1229 or book online. Written quote before any work, $99 service call waived when you proceed, and a 90-day warranty on parts and labor for any repair.
