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-   -   Dryer Operating Thermostat Testing (http://forum.appliancepartspros.com/dryer-repair/66457-dryer-operating-thermostat-testing.html)

FeralReason 01-03-2010 06:51 PM

Dryer Operating Thermostat Testing
 
In the process of diagnosing why dryer is not heating. Testing continuity with a multimeter (my first time). Tested thermal fuse and the thermostats on the housing for the heating coils - all ok. However there is a 4-wire thermostat on the exhaust two purple wires (right and left terminals) and two red wires with white stripes (top and bottom terminals). Which pairs of terminals to I check for continuity ?

magician59 01-03-2010 09:41 PM

There should be continuity between the two large terminals (red wires), when cold. If this is your first time to check for continuity, you will want to make sure you disconnect at least one of the wires from the component you're checking, so that you won't read anything misleading rom the rest of the system. If any of the thermostats is open, we like to recommend you replace them all as a set, so you won't have to do the same too soon (much like replacing your car's headlamps).

FeralReason 01-03-2010 10:41 PM

Quote:

Originally Posted by magician59 (Post 163924)
There should be continuity between the two large terminals (red wires), when cold. If this is your first time to check for continuity, you will want to make sure you disconnect at least one of the wires from the component you're checking, so that you won't read anything misleading rom the rest of the system. If any of the thermostats is open, we like to recommend you replace them all as a set, so you won't have to do the same too soon (much like replacing your car's headlamps).

Thanx much, magician59 -- that's exactly what I needed to know !

UPDATE: Followed your advice of disconnecting at least one wire before testing and discovered that the thermofuse was the problem. Replaced that and drier is heating up fine.
Thanx much, Glenn.

magician59 01-09-2010 10:57 PM

Well done...You saved yourself a bunch of money by avoiding the pro!


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