Is your hot-air tool not reaching the proper temperature or does it not get as hot as it once did. You may have a faulty heating element, says Industrial Heat Sources in its blog.

Damage of this type can be caused by a clogged nozzle, which limits the amount of air pushed through the element. When too little air escapes, pressure grows within the hot-air tool, causing the element to overheat and burn out.

Read more on IHS' blog.