Humidistat extractor fan running constantly

[opps]

I fitted an Xpelair bathroom extractor fan for a client.

It was fine for a week and then after her morning shower it kept running. 6 hours later, I removed the humidistat and it turned off (after reaching the timer over run period).

I tested the humidistat but didn't get any continuity.

In the meantime she just used the light switch to control it.

A week later, with the humidistat still showing no continuity (and the bathroom not having been used for 24 hours), I put it back in to the extractor fan, as soon as I did the extractor turned on.

Should the absence of moisture result in a lack of continuity in the sensor?

 

[jj4091]

As far as I know they act like a switch but do it electronically so you can not read closed or open circuit. I would guess the stat. has gone faulty but Xpelair would probably tell you. Call or e-mail them with you model number.