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Heating & Cooling

Wiring a hampton bay bathroom exhust fan and light combination.

I have installed several fans, none like this one.    Hampton bay-  Item # 249-872  , Model # VFB25ACLED1-5


I want to turn on the fan and light at the same time using one  switch.   I have 12-2 wire to the fan box. one black , one white and ground.   The fan box has seven (7) wires,  Black- ( L) , White- (N), Gr.- Ground,  Blue- Light,  Brown-Fan,

Red- n light,  and yellow- common.


The installation instructions are totally inadquate.  I had a electrian look at the wiring diagram, he said it was confusing.

I have tried several combinations, light works, but the fan does not,  one of the many combinations the fan worked for about 45 sec. then stopped.   breaker was not tripped.


How can this fan be wired to turn both fan and light on at the same time?  What is the yellow common wire for?


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Posted 2013-02-26T01:31:39+0000  by ezziegirl ezziegirl

I am having the same frustration with this unit as 911_in_SC and mmmmFoundation.  12-3 coming from two switches that controlled a pre-existing light and fan (not HB model) separately.  Now, I have 4 wires trying to feed this 7 wire unit.  We won't be using the night light either.  There has got to be a quick way to hook this up.  I have tried the combinations that seemed logical, but with ac/dc, what is the answer please?

Posted 2013-08-15T00:58:31+0000  by WesGRRR

DON'T BUY THIS PRODUCT TO REPLACE AN EXISTING UNIT!!!  I've never been so frustrated and disappointed with a Home Depot product.  First, the cut-out dimensions are wrong, resulting in a hole equal to the size of the mounting flanges rather than the housing w/o the flanges.  Second, nowhere on or in the box does it say that this unit requires a 120v power supply, but low voltage (DC) switching.  Even the wiring diagram fails to mention the low voltage switching, which likely explains why the things fail after someone connects this to 120v switching.  So, I've paid a premium price, spent 90 minutes in a hot attic, cut a hole too large, and can't use my existing wiring to complete the installation.  Returning the product is a less than satisfying solution.

Posted 2013-09-14T21:08:19+0000  by Brofish17


This is very helpful.  Can you tell me how to reuse the quick connectors for the wiring on this same unit?  The manual says they are reusable, but i tried the tabs and can't seem to get them to release.


Thanks, in adance.



Posted 2013-11-13T00:02:58+0000  by nukeit6
Right on the money! They could go a long way to help us out by including several real-world wiring examples for retrofit. Three hours into making this darn thing fit/work and now I get to take it out and find another. Likely on my dime!
Posted 2014-01-19T17:22:13+0000  by labdad
I have two of the Hampton Bay units described above (low voltage control) installed in my house.
One has failed and the help desk has not so far been able to resolve the issue.
The units have line voltage wired to the fan unit and a multi-conductor, #20 wire going to the switch box. Apparently, the units that I have aren’t being made now.
Is the a unit with the same physical dimensions, and using low voltage control that’s available?  Or, can I buy parts to repair my existing unit?
The alternative isn’t very appealing - opening up the ceiling and walls to install 12/2 cables between the fan and switch box.
Thanks in advance

Posted 2018-09-21T23:28:14+0000  by Dkc0225
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