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If you have already tried cleaning the vent then the problem is with the Thermal fuse. When the thermal fuse goes bad it cannot be reset and replacing it is recommended repair.It is located on the blower wheel housing inside the rear panel to the exhaust duct. Please get back to me if you have any other questions.
Kevin
First check to see that the exhaust venting line is clear (not full of
lint) as well as the path in the dryer to the line. This is the most
common cause of no heat.
For electric dryer:
Second set the knob to heat turn on dryer
with the lights off and the door open but the "open door" switch so that
it still rotates with the door open. Look at the back of the rotating
drum for a orange/red glow behind the drum (the heater coils). If there
is no glow the heater coils are probably broken.
As the dryers age,
the amount of thermal cycles the heater elements go through until the
point when the coil wire breaks. There usually two heater coils behind
the rotating drum (one hotter than the other and when combined the
hottest heat temperature setting. You will need to pop open the top
where you see the belt that turns the drum. Remove the front panels
(several screws and then it it slides up and out. The belt is removed
from the
spring loaded tensioner pulley at the base of the dryer. Then you can
lift the drum out to get to the heater coils. Since no heat, both should
be broken and will require replacement.
SOURCE: Dryer Won't heat
tested the thermal fuse inside back of dryer??? if so id check the heater and 2 other thermstats right there on back wall behind panel
SOURCE: Kenmore Elite dryer
If your dryer doesn't heat, check these:
Power from the house
Heating element
Thermal fuse
Wiring
Power from the house
Check to see whether there's power getting to the dryer. Is it plugged in? Check for blown fuses or tripped circuit breakers--your dryer uses two fuses or circuit breakers. The dryer could tumble but not heat if only one of the two fuses is blown. If you have circuit breakers, one of the two circuit breakers can trip, even if the two for the dryer are connected.
Heating element
Often a dryer heating element burns out, but doesn't trip the circuit breaker or blow a fuse. The heating element is simply a long coil of special wire. You can check it for continuity with an ohm meter. No continuity means the element is bad and you need to replace it--electric heating elements aren't repairable.
Thermal fuse
On many dryers, there's a thermal fuse mounted to the exhaust duct inside the back cover panel. The fuse--which is about an inch long--is usually embedded in black resin and mounted in a white plastic housing. If the fuse has blown, you need to replace it. (You can't re-set it.)
Wiring
A common problem is for the main wiring connection from the house, at the dryer, to burn and break its connection. Because the dryer can still tumble with partial power, the connection may be only partially defective. You may need to replace both the power cord to the dryer and the terminal block inside the dryer that the wire is attached to.
Hope this may help;
Rgards,
VOTIT
DON'T FORGET TO RATE;
SOURCE: where is circuit breaker in a LG DLE9577WM dryer
it could be the thermostat it could be a burned heat element if electric verify gas or electric
SOURCE: no heat from dryer
You have a bad heating element and or a bad high limit switch. Check them for continuity with a volt meter. No continuity, replace the part.
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Kevin
I checked all the thermostats (3) including the one on the blower housing and all had continuity. I had replaced the thermistor in the exhaust duct so I checked it and it had higher resistance than than the old thermistor which I cleaned and re- installed, I am now getting heat.
It wasn't quite the right solution but it led me to it
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