Midea MLTE45N4BWW Service Manual page 33

Service manual for Dryer Machine
The igniter does
8
not glow
Igniter glows – No
9
gas ignition
The gas is ignited
10 but the flame goes
out
Improper drying
clothes wrinkled
11
Rough texture
long dry time
Noisy and / Or
12
Vibration
-------------------------------------------------------------------------------------------------------------------------------------------------------
three symptoms.
If the igniter does not heat up, remove power and using an ohmmeter,
check the following:
● Open flame switch.
● Open igniter.
● Shorted booster coil.
● Open wiring.
● Bad motor switch (Neutral supply).
● No power from control (L1 supply).
If the igniter heats up but the main burner flame is not ignited, remove
power and using an ohmmeter, check the following:
● Open secondary coil.
● Open holding coil.
● Open wire harness.
● Stuck flame sensor (Stuck closed).
If a normal ignition takes place and after a short while the flame goes
out, check for the following:
● Flame sensor contacts opening prematurely.
● Weak gas valve coil may open when stressed by higher Temps.
● Weak Hi-Limit
● Poor venting
● Bad drum seals
● Lint filter is not clean.
● Restriction in exhaust.
● Outside exhaust hood damper door stuck closed.
● Exhaust too long, too many elbows, flex ductwork installed.
● Poor intake air available for the dryer.
● Incorrect tumbler speed. Tumbler belt slipping.
● Blower impeller bound; check for foreign material in blower area.
● Customer overloading dryer.
● Check clothing labels for fabric content and cycle selected.
● Clothes too wet due to insufficient spin out by washer.
● Thumping Check for loose tumbler baffle, rear tumbler roller(s) worn
or misaligned, out-or-round tumbler or high weld seam on tumbler.
● Ticking Check for loose wire harness or object caught in blower wheel
area.
● Scraping Check for front or rear bulkhead felt seal out of position or
worn tumbler front bearings.
● Roaring Check for blower wheel rubbing on blower housing or bad
motor bearings.
● Popping or squealing sound. Check for a sticky or frayed belt.
－ 33 －
Midea America Company