testing a themosat

[triothreetrio]

Hi I've found an old themsat how can you tell if they still work with out fitting as don't want it ,but would like know if it any good
thanks frazer

 

[Grazy]

I think I’ve you put it in some hot water it should expand

But I’m not 100% sure

 

[thejinx]

Heat it with a heat gun it should expand. I know that works when fitted so should work on the bench

 

[gas1man]

If fitted to the bracket there should be about an inch between the top of the unit and the bracket.

J

 

[jonboylaw]

If it’s already closed then it’s likely to be good, they fail open. Gently heat with a heat gun as already stated and it should expand. Best do this in the bracket to stop it expanding too far out.


Sent from my iPhone using Tapatalk

 

[Elibomrod68]

Definitely leave on bracket, I removed my good unit to calibrate it by placing in a plastic bag in a pot of water with a temp gauge... It expanded so much it bowed, cracked and was left with a pile of junk.

 

[atafonso]

Definitely leave on bracket, I removed my good unit to calibrate it by placing in a plastic bag in a pot of water with a temp gauge... It expanded so much it bowed, cracked and was left with a pile of junk.

Great advice right there. Never test the thermostate out of the housing, or it will destroy it.
Abel