Hi all I am needing help. Wires to fan box 1 white , 1 red, 1 black and 1 ground.
The new fan has
Pair – white & black
Pair – white & red
Pair – white & blue
1 ground [see pic)
Electrical – Bathroom exhaust fan wiring
bathroomelectricalexhaust-fan
Related Solutions
No way from here to know which wire fed the light or fan, but you have a continuous hot feed into the box that fed the receptacle, light and fan. The third wire, maybe it fed the fan or maybe something something else farther down the line, if the latter that needs to be tied in 100 percent to the hot feed. All whites still tied together, blacks to the dimmer from the light and hot. All grounds tied together set with a screw to the metal box. Securing the ground to the box is not needed if the box is plastic.
Before I got too wordy, here is a sketch
Still have to learn to format better
The sketch is a little rough, it should get the idea across I hope
Connect the black wire from the ceiling, to the black and blue wires from the fan/light.
Connect the white wire from the ceiling, to the white/black and white/blue wires from the fan/light unit.
Connect all bare/green grounding conductors.
Cap the red and white/red wires from the fan/light unit.
When you're done, the switch will turn on both the light and fan at the same time.
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Best Answer
Currently it appears you have 2 switches Providing power to the location and 3 loads, On the fan. Normally all the whites go to the white, the green and bare copper wires are connected ground there should be one or the other or a green ground screw to land the ground on.
Next try putting black with black red with red and leave blue disconnected to test.
Did the light come on with 1 switch and the fan with the other? Make note of what happened.
I usually connect the fan and light together on 1 switch if they are the ones that came on turn the power off again put them both on the same switch.
Now put blue on the other switch. Now when you are in the bath the light and fan will be on and only when you want heat turn the other switch on.
If this is a different setup possibly a timer or humidistat we might need to make more changes to the wiring but for a light, fan and heater this wiring would be normal with 2 switches.