Question about QMark Fan Forced Zonal Wall Heater - 208/;240v - 6824 Btu Wall Mounted Panel

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Replacement Cadet wall heaters=motor whine

My new replacements of Cadet forced-fan wall heaters have a high-pitched whine.  I believe it is the motor, not the fan where the noise originates.
An electrician installed these and claims they are correctly attached to studs, etc.  It does not seem to be vibration that is causing the problem.
One of the heaters (the 240 volt)  is one of three heaters in a large room, and they are controlled by one thermostat.  The thermostat is old, but the electrician says it is ok.
I don't remember the previous heater as having this problem.   
Is this an installation problem, or a problem with this brand of heater?  Or some problem with the router (?) or thermostat controlling the 3 heaters?  The original system, and the other 2 heaters, are 20 years old.
If it is in the design of the heater, what would be an alternative brand?  And if I put a different heater in the large room, would the other two in the same room need also to be replaced with the new brand?  Should the whole system be replaced---three total heaters, thermostat and router?  If I were to do that, how can I know beforehand how noisy they may be in operation?
Thank you for your help,  Helen

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  • mariahanne May 21, 2009

    Thank you, this is helping.  I'm sorry, I must have edited out the information that I did receive an exchange from the retailer, and installed a 2nd new Cadet heater with the same results.  Your answer suggests that this whine is a possible, but not probable, problem with new heaters.  So, since I have already received an exchange, and am unwilling to keep paying for installation until I find one that is ok---are you saying that this whine should disappear with use?  Any idea how long?   I think I have about a month's grace to return it again to the retailer.   (And I am used to the sound of the fan---it is pretty loud, but I am concerned about the whine that is above that and is sort of high-pitched and annoying---like nails on a blackboard kind of sound!


    And thank you for the other suggestions.  In the future, I will try for a store with a showroom.  This was purchased from Home Depot.  This store doesn't have a heater showroom, though their customer service is excellent.
    Thank you for your help, 

  • mariahanne May 21, 2009

    Yes. Now I know what is causing the noise, and I know my options. Thank you very much.

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Hello There

To start with your thermostat is not related to the noise. The noise in your new Cadet will most likely go away after some use, VERY occasionally cadets will make this whine when new but you should have it replaced if you bought it new. Cadets are generally quieter than an average refrigerator.

So in short get your new cadet replaced for another one and that will resolve your issue.

With regards to getting them all replaced, well you don't have if it's doing the job, however as they are 20 years old you will find that the newer ones are significantly more efficient and you are likely to save on your electricity bills each month.

One other thing to consider if you do decide to replace them is to look at wall heaters with built in thermostat, the advantage of this is it will measure the temperature of its location and come on and off depending on the temperature of the room it is located in. the disadvantage of having an integrated thermostat i.e one thermostat to control all heaters is it takes the measurement from where it is located and turn all the heater on and off making it less desirable and less efficient.

As for which ones you should replace them, well cadet is a very good make, but I would recommend that you go to a showroom and look around at all the different ones, they should all have efficiency rating and most will give you the noise levels too.

Hope This helps, Please don't forget to rate me.

many thanks

Posted on May 21, 2009

  • ILikeBMW
    ILikeBMW May 21, 2009

    Hello again



    Yes the whine noise you are hearing is basically bits of metal rubbing together. with some use the metals wear away and the noise disappears gradually. I would suggest if there isn't a significant improvement in the next 10 days or so, that you take it back and opt for a different model cadet.



    Best of luck, and please don't forget to rate me.



    Many Thanks

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