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Replacement parts for Roper RED4440VQ1 29"ELECTRIC DRYER | AppliancePartsPros.com
Check that the clothes are not too wet when putting them in the unit. Could be that it is a washer problem and not a dryer problem.
It is the amount of air flow that is important. It should be a strong flow.
Try the following to positively eliminate the vent system as the problem.
Unplug the unit and disconnect it from the vent system.
Now try a run.
If it now dries OK odds are the vent system needs checking/cleaning.
Be sure to check that the louvers on the outside of the house open correctly.
If you do not want any lint in the house.
Take a pair of pantyhose.
Put one leg into the other and then attach this to the dryer's vent.
Leave enough room so the pantyhose can balloon out like a windsock.
Both the above will let you check the temperature and the air flow.
Note: The above is not recommended for gas dryers due to carbon monoxide concerns.
If it still does not dry properly.
1. Check the lint filter. Sometimes they can get coated with fabric softener residue. Greatly reducing air flow.
2. Check/clean the blower wheel.
3. Check the holes at the back of the drum.
4. Check the internal seals in the unit's air flow path.
5. Check the exhaust air temperature on high heat. Should get up to around 155 degrees F. Your cycling thermostat opens at 155 degrees F and closes when the temperature drops to 130 degrees.