Help library

LONG TIME DRYING – EXHAUST VENTING

ISSUE

Flow Sense WARNING! Error code: d80, d90, d95

 Symptom

When a dryer takes longer than usual to dry, there is generally a reason causing such inconvenience.

If the control panel shows any bar lit up in the Flow Sense warning indicator icon or displays either code:

d80, d90 or d95 – there is an issue with poor venting exhaust causing the dryer to shut down to prevent

it from overheating and becoming a fire hazard.

 Check List

Should no such indication appear in the display panel window, starting with the obvious, customer should

verify the following:

1. Has breaker tripped or fuse blown?
2. If new installation in new house, has contractor completed 220 volt AC connection?
3. If selecting Cotton/Normal cycle, has the Energy Saver mode been deactivated?
4. Could the load size be too small the dryer sensors cannot detect any moisture?
5. Is the lint filter cleaned before every new load?

(even though the dryer powers on, no heat could still be an electrical deficiency. Dryer heater operates

at 220 volts 30 amps while the motor, control panel, lights and electronics all work at 110 volts 15 amps).

 Flow Sense Overview

80% of residential household fires in the United Stated of America start in the dryer. The cause of

these fires is due to the exhaust venting duct being too long or so constricted and clogged with lint

and moisture they prevent proper hot air exhaust from the dryer.

Clothes dryer manufacturers have been mandated to feature safety devices to monitor heat surges

and shut down machine immediately if detected in order to prevent any fire hazard.

The Flow Sense warning on your dryer is designed to help avoid reduced performance caused by

restrictions from the household exhaust system and alerting of such problem in the system so that

it may get fixed. The fix generally involved replacing the venting duct, shortening it or cleaning the

inside as you would a chimney.

Moment sensors detect a sudden rise in temperature algorithms quickly establish the rate of exhaust

blockage and proceeds to corrective measures (shutting down).

Drying clothes for too long at high heat will scorch the clothing. Fine example of this scorching is the

lint collected in the filter trap. Despite catching the bulk of it, some lint will keep going following the

moisture out the exhaust venting duct winding clogging the inner surface like plaque in arteries.

Have you ever packed a car tailpipe with snow as a kid then observe the car get started, choke, stall

then stop running? Well a dryer whose venting exhaust pipe is clogged does exactly the same.

A customer, uninterested by maintenance of the exhaust duct, might suggest making the dryer blower

fan more powerful. We don’t want LG dryers to sound like some jet plane airliner in your basement.

 Troubleshooting