Water seems to drip through extractor fan in shower

[AndyPandy78]

Hi my bathroom has no windows and relies on an extractor fan to expell the steam. About a month ago it started to slowly drip water through it. One drip every minute or so. I had thought it was condensation but the foil pipes appears to be dry.
Last night the fan tripped the lights. I've taken the motor out of the ceiling unit and the drip appears to come through the electrical connection on the inside of the plastic casing unit. It's an Airflow Loovent Mark One.
I can't work it out. I've been up to the loft there's no water pipes nearby and there's no leaks in the ceiling.
It's really bugging me now. Where could the drip be coming from? I would really appreciate your thoughts. Thank you.

[Clanad]

One clue is your statement that the foil "pipes" appear to be dry. My first suspicion is that the foil tubing is blocked somewhere along its run. The fan is working sufficiently to bring the steam into the area just beyond the fan body where it cools and condenses to water, dripping back into the fan mechanism and then into the room... I'd check the point where the foil tubing exits the house. Often times, insects or even critters will build nests there, especially in the colder winter days, blocking the escape of the vapor (Oh... ok, vapour, since I'm in the U.S.). Best of luck!

[malana-3]

By "foil pipes" do you mean the foil duct (about 4" diameter) which connects the extractor fan to the roof outlet? If yes, this should be fixed such that it has the equivilent of a "u-bend" in its length. This will retain any condisate and thus prevent it from running back to the extractor fan.