Dryer runs but heating element not coming on
Hi,
A Nice article by an expert ;-
This advice is for all ELECTRIC Dryers that have a "No Heat" problem.
Symptom: Dryer turns on, drum spins, but you have no heat.
Any of the following components are more than likely suspect as being bad:
Heating Element
Thermal Cut-Out
Hi-Limit Thermostat
All
these components COMBINED, should cost less than $100. If you fix it
yourself, you will avoid the additional cost for labor.
If the dryer isn't blowing ANY air at all, but the drum still
turns, you may have a bad blower fan assembly inside the dryer. Or, the
blower fan assembly may be clogged.
If your dryer performance has been failing (i.e., clothes taking
longer to dry), it may be for a reason. You need to ask yourself when
the last time you cleaned the dryer ventilation. If you can't remember,
or if it has never been done, this can contribute to the dryer failing.
All dryers need proper air flow in order to dry properly. If the
ducting becomes clogged, the heating circuits will actually overheat
and eventually fail. This usually results in the Thermal Cut-Out (TCO)
blowing or the Heating Element failing or BOTH. When these components
fail, they must be replaced. Remove the dryer hose from the back of the
dryer and inspect it thoroughly from where it leaves the dryer to where
it exits your home. It should be clear with no kinks or clogs. If your
vent line runs under a crawl space make sure it is suspended above the
ground and has no sags where lint could collect. RULE OF THUMB: The
SHORTER and STRAIGHTER the vent duct, the BETTER. After you inspect the
vent ducting, turn the dryer on and make sure you have forceful air
flow coming form the dryer. This will prove that your blower fan is
working properly or not. Since you stated that your dryer is not
currently heating, the air will be cold, but you should still have some
force behind it. If the air flow is weak, you need to clean the duct
work INSIDE the dryer. It is important to keep a dryer checked
routinely. I recommend once per season (that's 4 times per year).
Dryers are the cause of many house fires. These fires are due to lint
accumulations inside the unit catching on fire. A little preventive
maintenance can prevent significant problems in the future.
Getting to the heating circuit to determine if the components are
good or bad is the next step. If your dryer has the lint screen on the
top of the unit, you will need to remove the back panel of the dryer to
expose the heating circuits. If the dryer has the lint screen in the
door, you will need to remove the lower kick panel under the door by
using a putty knife to release the retaining clips. They will be
located along the seam in the front about 2 inches in from each side.
If this is a Kenmore Elite or Whirlpool Duet, the lower lick panel
comes off by removing the screws under the bottom edge of the panel.
(HINT: placing a block of wood under the front feet of the dryer can
make access much easier). If your dryer has no lower kick
panel, you have to remove the entire front panel on these models. This
is accomplished by lifting the dryer top and removing the screws that
hold the front panel in place.
NOTE: The heating circuit should
be troubleshot with the dryer UNPLUGGED. Dangerous voltages are still
present with the dryer turned off. Resistance readings are as follows:
Heating
Element (located inside heater box) – remove the two leads from the
ceramic terminals on the heating element and take a reading across the
terminal points. It should read 9 - 13 ohms.
Thermal Cut-Out
(TCO) (mounted to the heater box.) - unplug wires and take reading
across connector tabs. Reading should be 0 ohms.
Hi-Limit
Thermostat (mounted to the heater box, closest to the heating element
leads) - unplug wires and take reading across connector tabs. Reading
should be 0 ohms.
If any of the above readings are abnormal,
replace the component. NOTE: If the TCO or Hi-Limit Thermostat is
defective it is highly recommended by most manufacturers to replace
BOTH components at the same time. They are often sold as a set. Without
doing so, these components can cause potentially fail again.
Note :- One item I failed to mention - Double check the input power for your
dryer FIRST. You should have 220VAC at the receptacle and terminal
block. The dryer will STILL tumble and the timer will still function
with a portion of the input power missing as these circuits only
require 110VAC. The heating circuits, however, require 220VAC to
function. If one leg of the receptacle voltage is missing the dryer may
exhibit "No Heat" like symptoms. This could also be an indication of a
burned or failed power cord. Continuity checks performed with the dryer
UNPLUGGED should indicate a short between the prong end of the cord and
the respective lugs at the terminal block.
Hope i helped.
DO RATE THE SOLUTION.
Thanks for using 'Fixya'.