Thread: Why does the 115V-24V transformer keep blowing on my Trane XB80?
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Steve Turner[_3_] Steve Turner[_3_] is offline
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Default Why does the 115V-24V transformer keep blowing on my Trane XB80?
On 4/4/2011 2:57 PM, wrote:
On Mon, 04 Apr 2011 09:50:54 -0400, Jeff
wrote:

On 4/4/2011 9:19 AM, Stormin Mormon wrote:
It blows because something is drawing too much current.

Probably not. More likely it just gave up as it was designed too near
the margins.

Jeff
I think it imay be safe to say something drew too much power for THAT
transformer - however - a primary could fail open even if it NEVER had
a load on the secondary (in which case, for THAT transformer, even NO
load was too much.

Lots of REAL crappy electrical "goods" on the market today.

Just picked up a new White Rodgers model 90-T40F3 (input 120/208/240V, output
24V 40VA) from a local supplier that has a form factor very similar to the
original. White Rodgers also makes the control board into which the 24V feeds,
so hopefully bodes well for it being a proper replacement.

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