Countdown timer switch stopped working

[NeedHelp22]

I have a countdown timer switch hooked up to run my washroom fan. It stopped working all of a sudden.

I replaced it with a regular switch and the fan worked.

I took the old timer switch and hooked it up to another different washroom fan, and the old switch worked.

What am I missing?

 

[James]

A poor connection that you have fixed when switch was changed
Or a faulty switch brought back to life with the movement of replacement

 

[NeedHelp22]

A poor connection that you have fixed when switch was changed
Or a faulty switch brought back to life with the movement of replacement

Thank you.

I bought a brand new switch. That also did not work.

 

[James]

Time to get a professional in, I think.

 

[brianmoooore]

Is the new switch identical to the old? (Thinking new may require neutral and original didn't.)

 

[NeedHelp22]

Is the new switch identical to the old? (Thinking new may require neutral and original didn't.)

It’s the identical switch.

 

[brianmoooore]

Does it use the neutral?
......

 

[NeedHelp22]

Does it use the neutral?
......

The prior switch did not have neutral hooked to it. The switch does have a neutral pole though.

 

[brianmoooore]

What powers the timer mechanism? Pics and part numbers might help.

 

[NeedHelp22]

What powers the timer mechanism? Pics and part numbers might help.

 

[brianmoooore]

Mmmm! Your profile gives your location as Halifax, but I'm beginning to think you're nowhere near West Yorkshire. There must be another Halifax somewhere.
A quick Google search shows hat there are near identical versions of this, one requiring a neutral connection and one not, with the version requiring a neutral having MN tacked to the end of the part number.