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Mike G.
Mike G., Master Electrician
Category: Electrical
Satisfied Customers: 7244
Experience:  Proven Professional 48 years Experience
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I have a switch in our bathroom that controls an exhaust

Customer Question

I have a switch in our bathroom that controls an exhaust fan. I bought a timer switch so I could set the fan to run 1-5-10-15-30-45 minutes. The timer switch has 4 wires, marked ground-neutral-load-hot.... After turning off the power... The existing switch 2 wires... Hot and Neutral. I connected hot to hot. Neutral to Neutral. The switch lights came on, but the exhaust fan would not. I put the old on/off switch back in, and all works. I'd really like to have a timer on the fan, any suggestions?
JA: I'll do all I can to help. How long have you been dealing with this?
Customer: Well the timer is new and the original. Fan switch vintage 1965. This is a home improvement project.
JA: Do you plan on doing the work yourself?
Customer: Well, if I have to add wires etc,, probably not.
JA: Anything else we should know to help you best?
Customer: I don't believe so
Submitted: 4 months ago.
Category: Electrical
Expert:  Mike G. replied 4 months ago.

Hi, I'm Mike and I'll be assisting you. Please stand by while I review your question.

Expert:  Mike G. replied 4 months ago.

What color are the wires on the switch?

Customer: replied 4 months ago.
Both are black
Customer: replied 4 months ago.
House built in 1065
Customer: replied 4 months ago.
Sorry 1965
Expert:  Mike G. replied 4 months ago.

Try reversing the black wire connections on the timer.

Customer: replied 4 months ago.
Can you e-mail me your thoughts to***@******.*** on what needs to be done to make the new timer switch to work.
Expert:  Mike G. replied 4 months ago.

You connect it as follows.

  1. Black, hot wire to Line
  2. Black wire to fan on Load
  3. White neutral wire to neutral
  4. Ground wire to ground.

You may have had the black wires reversed when you wired it.