So a couple days ago I notcided my dryer no longer making hot air... After downlaoding troubleshooting and specs here I manage to figure out I have an open circuit on the Thermal Cut-off. I see here that APP sells the Thermal cut and High Limit thermostat as a kit, so i will replace both. But my question is, given age (8 years) and the failure of this part is there any "logic" to replacing the haeting element now as well? It still measures right at 10 Ohms which is the spec. So it is "good" right now.

Taking the unit apart is not a huge deal to do it later but I will be paying for overnight shipping, so don't know if it makes sense.

Thoughts/opinions?
Thanks in advance

Chad

Here is the tech sheet
http://www.servicematters.com/docs/wiring/Tech%20Sheet%20-%203979300.pdf

[COLOR="Blue"]the failure of this part is there any "logic" to replacing the haeting element now as well? It still measures right at 10 Ohms which is the spec. So it is "good" right now.[/COLOR]
Did you check to see if the element was grounded?
As magician59 said, if it is OK then I would not replace it.

Note: that sometimes they do just blow on their own but changing it without checking other things is a gamble.

Check the heating coil.
Unplug the unit and both wires to the coil.
Check it with a meter, should be around 10 ohms.
Then check from each side of the coil to the case/frame, both should be infinite ohms (open). If not the coil may have sagged or broken and is touching the case. This can cause it to run on high and the thermostats cannot regulate it.

If the above is OK then you will also have to replace the hi-limit as it should have regulated the temperature so the fuse did not blow.

You still have to find out why it blew.
Check that the belt is OK.
Check the seals (drum etc) in the unit. The air is pulled over the heating coils, through the drum and pushed out the exhaust. So any large seal leak will pull in room air and the cycling thermostat on the blower will run the unit hot.
Check that the lint filter is not coated with fabric softener residue which greatly reduces air flow.
Check/clean your vent system.
Check/clean the blower wheel.

If all OK you may want to replace the cycling thermostat as it's contacts may not be opening (welded shut).