I have a roper RES7646KQ3 and it has worked fine, and withing the last couple weeks it hasnt been drying the clothes as well and now it wont heat up at all?

You may want to do a thorough tuneup on your dryer. I worked on a couple and wrote a pictorial on it. ROPER DRYER TUNE-UP
My Home movie of a Roper dryer with a heat problem:




If you need further help, reach me via phone at https://www.6ya.com/expert/dan_73bbd84fe1d95b61

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

heatman101

Its probaly gone open circuit, however there is a thermistor that prevents it shorting out, you need to locate it and test it with an ammeter

I would check for a blown thermal fuse or faulty heating element. These components can be tested using a multimeter. Check for continuity. A lack of continuity indicates a faulty component. The thermal fuse is about one inch long and is located in the rear of the dryer, usually attached to the exhaust duct. Hope this helped and best wishes.

replace your t-fuse again but also chekc to see if the vent going outside is restricted. if hte vent is smashed or clogged the heat has nowhere to go. i would say that is your issue. clean your vent before you change he t-fuse.

Most common cause of this is a clogged venting going to the outside to test this remove the vent from the back of the dryer and run a load if it drys ok them you know you have a venting issue and will need to be cleaned out if not plz repost and we can look deeper into it

my washer works fine but the dryer wont heat up or dry the clothes it goes onto dry but all the clothes are still coming out wet and the drum is cold

it sounds to me like the heating element that heats up to dry the clothes has gone faulty or tripped out. Cant really tell from here.. when you open the drier is there a good level of heat ? If not, its the heating element section at fault.

Yes UNPLUG and open the back of the unit on the bottom right side you will see the element in a heat chute that model has what I call a half element it mounts on the bottom portion of the chute just remove the 1/4" screws and the high limit stat and you will see how the new one goes on

  If the timer is set for a auto dry cycle,  the timer won't advance if not heating.  You need to check for 220 volts at outlet.  It's possible to have only 1 110 volt circuit.  May be a bad breaker. or outlet.  If you have 220 volts at outlet,  you need to have an ohm meter to check continuity of the thermal fuses and the heater.   Access by removing rear panel.  UNPLUG FIRST!!!!!