No Heat, intermittent scrap noise

more than Likely a thermostat ,, here take a look on this link http://www.partselect.com/dryer+dryer-wont-heat+repair.htm

This is usually the dryer coils have failed. They tend to fail as they heat up. They are inexpensive and easy to replace. Here is a video on replacing the dryer coils.
You will also find videos of disassembling most style dryers at the same site.

to me it sounds like your venting going out side,if it doesn;t get a clear flow it will come on and off the thermastate inside sencing to much heat.try unpluging the vent then try it if it stays on then you know your answer

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If you are having problems with your gas dryer not heating the most common problem is that the ignitor goes bad. Even though it glows sometimes it is still not working properly.

if you dryer is gas check out this gas no heat tip....

If you have an electric dryer, you can have many different things that can go wrong causing the dryer not to heat.

check out this electric no heat tip...


heatman101

if it has heat the first 15 to 30 minutes and then no heat you have bad gas coils,they are located on the top of the gas valve,just remove the two phillips screws,remove the cover and change out the coils,

Hi,

If you are having problems with your gas dryer not heating the most common problem is that the ignitor goes bad. Even though it glows sometimes it is still not working properly.

if you dryer is gas check out this gas no heat tip....

If you have an electric dryer, you can have many different things that can go wrong causing the dryer not to heat.

check out this electric no heat tip...

heatman101
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There's a good chance you need to replace the igniter. Careful, they are brittle !!!

If this is a gas dryer, I'd suggest an inspection by the gas company or qualified technician. If the jets aren't firing correctly, you are wasting gas and possibly creating a hazard.

Check the lint tubing and also for lint underneath the dryer. There is a blockage somewhere for this to happen. This is a built in safety feature for gas dryers that others don't have.

We have a Neptune Gas dryer,my husband changed the belt cause it was making noise,now the heat hardly works,i put the dryer on for 40 minutes and usually it is dry,now i did that twice and clothes is still damp,would you know what the problem is please help