Whrlpool gas dryer lg7681xsn3 won't get hot, stays look warm. Alreadt changed cycling therm. and gas selenoids. Tem adjustment knob tests o.k.

You will need to replace the timer. Here is the part to order.

Duet sport dryer service manual

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Most likely the motor relay or the even heat board is bad.

you could have bad gas coils.if the timer doesn't advance in auto dry most likely you're having heat problems,when the dryer heats and then the heat shuts off then the timer will advance,when the heat comes back on the timer stops,it does this until the clothes are dry.gas coils when starting to fail will work normally until they get hot and then no heat until the coils cool down then they will work again,on time dry the timer just keeps counting down until the time runs out no matter what's happening to the dryer.i've seen the coils fail after the first 10 minutes and other times for 20 to 30 minutes but usually if the load is big and in time dry the clothes will feel warm and you'll need to dry them a second time to get them fully dry,also while you're in ther you should clean out the dryer at least once a year,clean out the duct that the lint filter slides into,vacuum out the cabinet where the motor is and blow out the vent line,if it's a long run i use a leaf blower to blow out the line,remove it from the back of the dryer,stick the leaf blower into the vent line and blow it out,i've blown out birds nest out of some lines, your clothes will dry on time,you won't go through so many parts and you won't have to worry about a dryer fire,the gas coils are on top of the gas valve,remove the two phillips screws,lift off the cover and change out the coils.next time you use the dryer keep an eye on it,after it runs for 20 minutws start checking it,you'll hear a click,then another click and the flame will lite,look into the gas tube and if the flame isn't liting then you have bad gas coils.

If the flame come on to start with, but then goes out and won't come back on I would suspect you have a bad coil on the gas valve.
If you see the flame cycle on and off, but the flame does come back on again this is normal. The flame needs to cycle on and off and not be on steady or the dryer would get to hot.
If the flame is cycling ok and the cloths just don't get dry then you need to check your dryer and vent for lint build up.

more than Likely,, the thermostats are discs ,, located along the vent tube inside the back of the machine, one of yours is weak and allowing the switch to turn off to soon

If any of your dryer's thermostats have become defective, they could be the reason that your dryer is not heating. Open up your dryer's cabinet and test each of your dryer's thermostats. If any are faulty, replace them, according to parts select try this Testing a thermostat

Note: Disconnect the power source to your dryer before you conduct this or any other test. Either unplug the unit from the wall outlet, remove the appropriate fuse from the fuse box, or flip the appropriate breaker in the circuit breaker panel.

Your dryer uses multiple thermostats to regulate its internal temperature. The cycle selected determines which thermostat is used. A cycling thermostat can be found somewhere in the path of air that is leaving the drum. It could be found on the blower wheel housing or inside the venting/exhaust system. Dryer thermostats are usually oval shaped and about an inch and a half in length. Also, there should be two wires leading to each thermostat. Label these wires before you remove them so that you are able to correctly reconnect them later.

The wires leading to the thermostat are connected using metal slip on connectors. Remove the wires by pulling on the connectors, and not the wires themselves. It may be a good idea to use a pair of needle nosed pliers to help you.

Set your multimeter to the R X 1 setting. Take each of your meter's probes and touch one to each terminal. You are testing for continuity, and you should receive a reading of either zero or infinity. At room temperature, testing the thermostat should produce a reading of zero. But if a thermostat is tested when it is heated to its limit, a reading of infinity should be produced.

disconnect the vent tube and run a load of clothes, then clear the vent tube of the restriction, Tim

Hi, If you have a gas dryer.
The most common problem with a gas and no heat is the ignitor going bad...

Here is a tip that I wrote about that problem...

Gas Dryer not Working Gas Dryer Not Heating
http://www.fixya.com/support/r4398592-gas_dryer_not_working_gas_dryer_not

If your dryer is electric..
There could be a number of different problems...
Check out this tip that I wrote about this problem...

Dryer Troubleshooting Electric Dryer won t Heat
http://www.fixya.com/support/r3866345-dryer_troubleshooting_electric_dryer_won

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