Dyer is not heating up.it turns on and runs but it just does not heat up i took off hose and clean . also looked in back of dyer by taking off clover to look for fuse please help .

Remove exhaust hose. Clean out lint. Remove back of dryer. Clean lint out of air flow system including lint and heat unit(coils). Try dryer. Is heat element glowing red hot? If not, replace heat element. They burn out intermittently and need lots of air flow to have good life. Clogged lint traps shorten life cycles. Definitely a DIY project. See youtube for general process.

Take a look at some of these videos to help you diagnosis the no heat problem.
http://www.youtube.com/results?search_query=duet+dryer+no+heat&oq=duet+dryer&gs_l=youtube.1.0.0l4j0i5l6.2271.5049.0.7601.10.10.0.0.0.0.100.624.9j1.10.0...0.0...1ac.1.11.youtube.EGor8jRswXo

Could be bad heat element. Lift top of dyer, or look from back side with access panel removed, or look thru door if glass door while dryer is running on a heat cycle. You should be able to see red glow of heat element coming on. If not then you will need to open up dyer and remove drum. Inspect heat element for break in coil or coils touching each other or metal frame of dryer. You can also use an ohm meter and read the restence of the coil ...should be just a couple of ohms.
If it is a bad coil you should be able to replace fairly easy. If it is not coil than you will need to check themistor or cycle control switch. Hope this helps.

check for air flow on back of dyer, also check the heating element. could be a bad heating thermostat in dryer. good-day !

check for lint buid up in back hose

the fan is sopposed to cycle on and off its to keep the car cool your problem ti your heater core is plugged up and very restrictive. just pull the hoses off of it on the fire wall and hook up a garden hose to one side by cutting the end off and clamping the hose to the heater core, then turn the water on untill clean water with good flow comes out of the other hose bung, then switch sides and run the water the same way then hook everything back up and top off your coolant leval and check to c if all is well

you could have restricted airflow from the lint screen not being cleaned, a bad blower wheel, or a bad thermostat. take the vent hose off the back and check to see if the air flows out the dryer with good force, if so your vent is probably clogged or not open in the wall. the vent hose may also be picned off from puching the dryer back to far.

There is a little sensor that tells the dryer when to heat and when not to heat. that sensor is bad. If you take the back of the dryer off you will see it. It is about the size of a half dollar and has 2 wires that plug into it. While you have it apart make sure that the dryer vent on the back of the dryer is not plugged with lint. Major cause for fires in dryers.

the flame going out is normal. the heat cycles on and off as called for by the thermostat. If the heat doesn't come back on i would start by changing the gas coils.

If you're experiencing a dryer that requires a longer time to dry, you may want to view this link:

http://www.fixya.com/support/r630242-dryer_runs_but_not_heat

Pay particular attention to the first major paragraph. I know the link is for a no heat problem, however, if you have a dryer that is starved for air, the heating circuits will eventually fail. In most cases, a no heat, or longer dry time problem is directly associated to clogged ventilation, kinked dryer vent hoses, improperly installed vent ducting, a clogged blower fan assembly, or rodents. Yes...the last one isn't always fun, but I have found bird nests, mice nests and even snakes inside dryer vents, clogging the air flow. The symptims were all the same - a dryer that would not dry properly. Before you assume you have a component going bad, take a good look at the way your dyrer is installed and inspect it thoroughly for what might be a good cleaning. The outsiode dryer vent should be at least 12 inches off the ground and a louver is recommended to cover the end to prevent critters from getting inside. In addtion, the SHORTER nd STRAIGHTER the dryer exhaust vent is, the better. If you have an exhaust vent with excessive bends, or excessive run length, this can contribute to poor heating of the dryer. Especially exhaust vents that run thorugh an attic or under a crawl space. They typcially develop sags, which create choke points where lint can accumulate to the point where it clogs. I do not know what your situation may be, but provide this as some helpful guidance just in case. I hope you find this information helpful. If you inspect your dyer and still have problems, please post back and let me know.