Mystery solved. I went to Lowes to pick up a new one and they sold the same
brand (Fahrenheat manufactured by Marley) and what appeared to be the same
unit. The box and the unit itself is clearly marked 240 Volts. So, I figured
I'd made a mistake or the old one was mismarked or was in fact, dual voltage.
So, I put the dual breaker back in and swapped units. With the old one out I
could clearly see the sticker that said "WARNING: RISK OF FIRE. USE 120 VOLTS
ONLY." The instructions that come with it tell you to double check the inside
label to be sure you have the correct voltage. I assume the builder specified
240, got 120 and the electrician didn't check and installed it anyway. I
would guess that running at double voltage somehow caused the buzzing. And,
the idiot also attached the ground wire to the box, but attached everything in
such a way that there was no connection between the unit and the box, hence no
ground. So much for not correcting professional's mistakes!
Now I have to worry about what else he did wrong!
> Date: Wed, 17 Dec 2008 20:10:17 -0500
> From: trevor@boicey.com
> To: doug@dougbraun.com
> CC: shop-talk@autox.team.net; jandkstone99@msn.com
> Subject: Re: [Shop-talk] Mysterious Stip Heater
>
> Doug Braun wrote:
> > If the heater was meant for 120V and it was connected to 220V, it
> > would burn out, blow the circuit breaker (or burn up) REAL fast!
>
> I wouldn't bet your house on this, but I know of at least one heater
> in my world that is 220v or 110v.
>
> The heater element in my hot tub is the same whether your tub is 110v
> or 220v. It is rated for 1500w at 110v or 6000w at 220v.
>
> So I wouldn't take this as ANY recommendation to let 'er rip at 220v
> unattended, but if it's just a plain resistance heater....
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_122008
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