Lost schematic for ceiling fan wiring.

It is thermostatically controlled and has manual override.

Do I treat the thermo part of the control as one of two three way switches? Or is it something altogether different?

Any schematic for installation appreciated.

What is the brand and model number?
Is it a hanging ceiling fan or a vent fan?

Your post is too general to really help you yet. :confused:

Can't figure why brand and model matters.

Let's pretend I'm asking about a light that would have the same properties, a thermal switch, a manual override, the off/on light switch, are NOT PART of the light. They are separate from the light.

Does that help or not?

If you only have a single switch to turn on the fan then just remove the switch and install the thermal switch in its place. How many wires do you have on your thermal switch. If you have 2 wires. Connect incoming power to line wire and outgoing wire to load wire. If you have 3way switches turning on the fan then you will need to figure out which switch has the load wire going to the fan and install your thermo switch in line with the load wire going to the fan.

No, sorry.

Good luck with your project.

Jerro:

I don't have any three way switches. I have: a wall switch that I want to use to manually overide the thermal switch. The thermal switch is in the fan housing in its own box. I was just curious to know if the thermal switch should be treated as you would any 3-way switch to accomplish an installation.


The thermal switch has two wires.

The power to the fan comes from the wall switch box and then is routed up to the fan as a three wire (white, red, black) into the switch box in the fan housing.

The connections in the wall switch box and the thermal switch box are the schematics I'm trying to find.

Does that help?

THIS is why the brand and model matter.

If you can give the brand and model number then Stanfortyman can probably show you a schematic of the wiring.

It's not guaranteed, but this information is almost certainly online somewhere. If not at least we can see what it is we are dealing with.

Is this the logic you are looking for?

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@HK Stroud:

Exactly what I needed. Many thanks...

@HKStroud

I tried this connection but it did not work. Normally a three-way switch has three conductors and a ground. But the thermal switch has only two conductors.

The diagram shows three dots in the circle. What is the third one? I only have two wires
Coming off the fan, black and white. There are two connections on the thermal, (which I presume acts like a single pole switch).

What are the three dots in the circle representing the fan?

The circle represents the ceiling box for the fan. The dots represents wire nuts to indicate where wires are (or may be ) connected. The dots on the switch indicate screw connections.

Yes the thermal switch is a single pole switch.

Connect the fan white (neutral) to the house white (neutral).

Connect the fan black to one thermal terminal.
Make a pigtail (a short piece of wire). Connect it to the other thermal terminal.

Connect the fan black, the house black and the pigtail together with a wire nut.

Connect the house red to the other thermal terminal.

With the 3-way wall switch in one position there will be a connection between the hot common screw and the black wire which connected directly to the fan. The fan will operate.

When the switch is in the other position there will be a connection through the red wire to the thermal switch. When the thermal switch is "made" there will be a connection to the fan and the fan will operate. When the thermal switch in not made the fan will not operate.

I'm not sure how sensitive to temperature changes this thermal switch will be sense you indicated it will be inside the fan canopy.

Is this thermal switch something you are adding or did it come with the fan.

Thermal switch came with the fan and affixed to the struts that hold it in the housing.

In any case, if the thermal needs to be activated for the fan to operate, it would defeat my purpose of by-passing the thermal to install.

Thanks for your help.

Then you really need to obtain the operating instructions. They may say something like:

"To set to automatic turn switch on, then turn off and turn back on within 10 seconds."

"To set to manual mode turn switch off for 1 minute."

These are not the instructions, just something I made up. But if that were the operation instructions, the wiring instructions would be to just wire in a regular single pole switch with the black house wire to one terminal of the thermal and the fan black to the other.

After reading your last message I think your actually talking about an exhaust fan and not a celing fan. A lot of exhaust fans have thermal overloads attached to them in case the area around the fan get to hot it cuts the power off to the fan. I'm thinking your wire going to the fan with red,black,white,ground going to it is in case you had a light on it and wanted to turn each one on separately. If this is the case then use the black wire from the switch as your hot wire and connect it to one of the wires from the thermal unit, Connect the other wire from the thermal unit to the black wire from the fan motor and connect the whites from the motor and incoming wire together. Hope this helps

If jerro is correct we have a hole new ball game.
It had not occurred to me that a ceiling fan could be an exaust fan.

I asked this in my first reply. I never did get an answer and was told it didn't matter. :rolleyes:

Yes, what exactly type of fan is it?

And, brand and model? ;)

It is a Broan exhaust fan.

I have gone to the website for Broan and found the schematic for a similar fan, with a different model number. Apparently the model I had is no longer made.

But the logic is the same for my fan.

I have wired it as described and it works perfectly. I did the same wiring on a light fixture instead of the exhaust fan first and it worked as well. I did it with an electrical socket and it worked too.

The diagram works for ANY thermally switched/by-pass/manual fixture. If you want to see the diagram I will post the exact website. Let me know.

Thank you all for you help and sorry to waste your time.