Gas Dryer Spillage and a Customer Who Refuses Vent Repairs
An eight-year-old gas dryer takes two cycles to dry a normal load. The laundry room smells faintly of exhaust while the dryer runs. The vent is 4-inch flexible foil duct, about 6 m long with two 90° elbows, and it terminates under a deck through an insect screen. The lint filter is clean. A CO meter reads 0 ppm before start-up and 38 ppm at breathing height after 10 minutes of operation. A smoke test shows spillage at the dryer's draft hood. The customer says the dryer has worked this way for years and refuses to replace the vent because it still dries eventually. The dryer is in a basement with a gas furnace and water heater in the same room.
1. What are your immediate safety actions, and why can you not simply clean the vent and leave?
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Treat the CO reading and draft-hood spillage as an immediate safety hazard. Shut off the dryer's gas supply at the appliance valve, disconnect electrical power, and tag the appliance with a do-not-use notice. Open windows or doors and ventilate the room. Do not run the dryer again. Keep the customer and others out of the room until the CO reading returns to baseline. Because the room also contains a gas furnace and water heater, recommend that a qualified gas fitter inspect those appliances for spillage or backdrafting. If the CO level is rising or anyone has symptoms, evacuate and call emergency services. Cleaning the vent may improve airflow, but the vent configuration is non-compliant and the CO exposure must be corrected before the appliance is used.
2. Explain the hazard and the required repair in terms the customer can act on.
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Explain that 38 ppm CO at breathing height and spillage at the draft hood mean combustion products are entering the room instead of going outdoors. The 4-inch foil duct, 6 m length, two elbows, and insect screen are likely restricting airflow and causing spillage; foil duct also crushes easily and traps lint. The correct repair is to replace the vent with smooth rigid or semi-rigid metal duct, minimize length and elbows per the manufacturer's instructions, remove the screen, and terminate outdoors with a proper damper. The dryer must not be returned to service until the vent is corrected and CO is verified at 0 ppm with no spillage. The customer's belief that it still dries is not evidence of safe operation.
3. What will you document, and what will you do if the customer still refuses?
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Record the CO readings, smoke-test result, vent configuration, gas shutoff, tag, and customer statements. Give the customer a written notice that the appliance is unsafe and must not be used. Recommend a licensed gas fitter and venting contractor. If the customer refuses, do not restore gas or operation; document the refusal and advise the landlord or property manager if applicable. Schedule a follow-up to verify the repaired vent and CO level. The professional standard is to leave the hazard controlled and the customer fully informed, not to accept a verbal promise to fix it later.