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Old 10-31-2010, 11:27 AM   #1
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Wiring for replacing a bathroom fan, heater, light and night light unit.


I am replacing my bathroom vent that has a fan, heater, light and night light with a new very quiet Broan unit that does the same things. The switch has 2 toggle switches. One for fan and heat neutral position in the middle. The other toggle controls the light and night light.
I removed the old unit which had 5 wires coming from the unit. The wires coming from the wall up into attic consists of to lines. Line one has a black, red and white wire along with a copper ground. The other line has a white and black and ground. I got to the point where light, night light, heater was working with there respective switches. Tried to add the fan into the mix and messed the thing up. All the diagrams that come with the unit show both lines have 3 wires each. The one that seems to be the problem is the missing red wire. Any ideas on what I'm doing wrong? Thanks.

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Old 10-31-2010, 01:46 PM   #2
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Wiring for replacing a bathroom fan, heater, light and night light unit.


Legally you cannot do it.

You need four colored (not green) wires, for fan, regular light, night light, and heater respectively. And one white wire for the neutral.

Now if the power comes to the light fixture first, you can connect the night light to the raw (unswitched) power and you have enough wires down to the switch box for the other three items. Not quite what you wanted because the night light is now on all the time.

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Last edited by AllanJ; 10-31-2010 at 01:56 PM.
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Old 10-31-2010, 01:56 PM   #3
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Wiring for replacing a bathroom fan, heater, light and night light unit.


The original wiring was what the electrician had when the house was build.
I did get it to work but then came up with another problem described below.

I turn each function on it it works individually.
With the light on and I turn on the Fan, it doesn't go on
If the Fan is on and I turn on the Light, the Fan goes off.

With the Heat on and then turn on the light, the Light doesn't turn on but Heater stays on.

What are your thoughts?

Tom
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Old 10-31-2010, 01:59 PM   #4
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Wiring for replacing a bathroom fan, heater, light and night light unit.


Allen, here is what I have connected

The wires are as follows for the unit:
Blue- Light
Red-Fan
Yellow-Night Light
Red-Heat
White
White w/red stripe

I have the following connections
Line 1: Black to yellow
White to White

Line 2: Black to Red
Red to Blue and Black
White w/ red stripe to White
Both ground wires grounded

Can you tell me what I did wrong?
Thanks,
Tom

Last edited by tgallopbs; 10-31-2010 at 02:03 PM.
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Old 10-31-2010, 02:05 PM   #5
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Wiring for replacing a bathroom fan, heater, light and night light unit.


The original wiring was what the electrician had when the house was build.
I did get it to work but then came up with another problem described below.

I turn each function on it it works individually.
With the light on and I turn on the Fan, it doesn't go on
If the Fan is on and I turn on the Light, the Fan goes off.

With the Heat on and then turn on the light, the Light doesn't turn on but Heater stays on.


Allen, here is what I have connected

The wires are as follows for the unit:
Blue- Light
Red-Fan
Yellow-Night Light
Black-Heat
White
White w/red stripe

I have the following connections
Line 1: Black to yellow for the night light
White to White

Line 2: Black to Red for the Fan
Red to Blue and Black for the Light and Heat
White w/ red stripe to White
Both ground wires grounded

Can you tell me what I did wrong?
Thanks,
Tom

Last edited by tgallopbs; 10-31-2010 at 07:48 PM.
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Old 10-31-2010, 05:52 PM   #6
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Wiring for replacing a bathroom fan, heater, light and night light unit.


Quote:
Originally Posted by AllanJ View Post
Legally you cannot do it.

You need four colored (not green) wires, for fan, regular light, night light, and heater respectively. And one white wire for the neutral.
I don't know about law, but he has 5 colored wires, theoretically enough for the job.
I bet it could work, but need more info.
Tom, did you record which wire went to which color of the old unit?
Maybe you can share the manufacturers 6 wire instructions with us.
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Old 10-31-2010, 06:25 PM   #7
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Wiring for replacing a bathroom fan, heater, light and night light unit.


The switches are a mystery too. Is it possible to get a pic of the wires on the switches? Maybe some of the more experienced folks here have seen these 2 and 3 position toggle switches you describe, but I haven't. Searching...
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Old 10-31-2010, 07:21 PM   #8
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Wiring for replacing a bathroom fan, heater, light and night light unit.


Can you post us the model numbers ?? then we will go from there and is this cables is NM or BX or MC or Greenfeild { flexiable metal conduit }??

And where the power source and by the way with heater verison it have to be on it own circuit due the wattage rating. { typically required 20 amp circuit }

Merci.
Marc
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Old 10-31-2010, 07:28 PM   #9
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Wiring for replacing a bathroom fan, heater, light and night light unit.


Here is a picture of the switch that came with the original bathroom unit 10 yrs ago. See my previous posts to see the wiring descriptions.
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Wiring for replacing a bathroom fan, heater, light and night light unit.-img_0707.jpg  
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Old 10-31-2010, 07:33 PM   #10
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Wiring for replacing a bathroom fan, heater, light and night light unit.


Can you unscrew the cover ?? but do NOT unhook the wires at all just leave them alone and we will figure it out from there.

Merci.
Marc
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Old 10-31-2010, 07:38 PM   #11
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Wiring for replacing a bathroom fan, heater, light and night light unit.


There were 5 wires going to the older unit. The new unit has 6 wires. Did you read my post on what wires I have and what I did? On the old unit there was only one White wire. This unit has 2. One plain white and one white with a red stripe. The older unit has a white to the yellow and the other white to white. Seems like that be something that could help but I don't know. I always connected white to white
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Old 10-31-2010, 07:41 PM   #12
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Wiring for replacing a bathroom fan, heater, light and night light unit.


I did read it that why i ask for the model number of the unit so I can able give you a straight answer how to hook up and what more is this heater is on own circuit or tied to the bathroom circuit ??

More info the better it will help your situation.

The key item due I can able look up the manufacter wiring diagram to show the proper connections so I can help you with it quicker.

Merci.
Marc

Last edited by frenchelectrican; 10-31-2010 at 07:43 PM. Reason: add a note
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Old 10-31-2010, 08:15 PM   #13
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Wiring for replacing a bathroom fan, heater, light and night light unit.


Here are the pictures on inside the switch plate.

The Fan is Red to Red Romex
The Neutral is Black To Black to other Neutral Black
The Heat is Blue To Black

The Light is Brown to Black
The Neutral is Black
The Yellow is Night Light to White

Then there is a White to White inside the box
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Wiring for replacing a bathroom fan, heater, light and night light unit.-img_0709.jpg   Wiring for replacing a bathroom fan, heater, light and night light unit.-img_0710.jpg  
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Old 10-31-2010, 08:22 PM   #14
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Wiring for replacing a bathroom fan, heater, light and night light unit.


Hi Marc:

The new unit is a Broan QTX110HL very quiet fan .9 Sones

The old unit was also a Broan or Nutone that had a fan, heater, light and night light.

The switch is from the old unit. Since it was doing the same functions, I thought it would work with the new unit.
Like I said, each function works individually as the switch implies.
It's when I add the other switch function is where I have problems.
Thanks for your help. Isn't this a challange!
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Old 10-31-2010, 09:04 PM   #15
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Wiring for replacing a bathroom fan, heater, light and night light unit.


Give me a minute I will come up the connection diagram { I have to change it from French to Engish in here }

Merci.
Marc

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