This is a look at a few more potential causes of a tumble dryer not heating up any more. Part 1 is available here Tumble dryer not heating – part 1 although if you prefer to read this page first there’s a link to part 1 at the end of this article.
Faulty Heating element
Another cause for a dryer not heating is of course a faulty heating element. However, replacing an element in a dryer is often much more involved than most people would think as some dryers would need completely taking to pieces. Some simple vented dryers though have heating elements that are more easily accessible by removing the back panel, and can be tested for continuity or checked for obvious breakage.
Some can just have a small compact element inside a metal housing, which slots in and out of the back easily – but most others have large heating elements inside, which aren’t accessible without stripping the dryer down.
A faulty element could be obvious by being physically broken or damaged, but if not, the only way to test one is with a continuity test meter to check that there is a complete circuit all the way through it.
To see what tumble dryer elements look like, and the variety of different types fitted, look at this spare parts catalogue of dryer elements
Note: Tumble dryer heating elements are always protected by thermal fuses, which are usually simple devices with 2 wires connected. They can be tested for continuity with a test meter and are discussed at length in part one (link at bottom of article).
Micro switches and sensors
Condenser dryer float switches: If you have a condenser dryer it will be designed to cut off the heater via a float switch if the drawer or compartment holding the condensed water gets full. If the dryer stops heating check the compartment has been emptied of water – although most condenser dryers now should have some way of informing the user that the drawer needs emptying such as via a flashing light. It is possible for one of these float switches to go faulty, or stick, therefore triggering the warning when the chamber is empty preventing the heating element from switching on.
More on tumble dryer not heating
This article looks at just a few of the possible issues when a tumble dryer’s not heating up any more, for more help see part 1: Tumble dryer not heating